HADSS USER'S MANUAL
March, 2002
by
M.C. Sturgill, G.G. Wilkerson, A. J. Price, A.C. Bennett, and G.S. Buol
North Carolina State University
Department of Crop Science
North Carolina State University
Raleigh, NC 27695-7620
Crop Science Department Research Bulletin 198
HADSS™ has been developed through the cooperative efforts of researchers at North Carolina State University, USDA-ARS, and Universities throughout the Southeast. Recent funding for programming and field validation studies was provided by USDA/CSREES and ARS. Development of HADSS™ was supported in part by grants from USDA/CSREES, USDA/ARS, the American Soybean Association, United Soybean Board, Mississippi Soybean Promotion Board, Corn Growers Association of North Carolina, North Carolina Soybean Producers Association, North Carolina Center for IPM, Georgia Agricultural Commodity Commissions for Soybean and Peanut, Georgia Department of Agriculture, and Region IV U.S. EPA.
THE SOFTWARE AND INFORMATION IN THIS USER'S MANUAL ARE MADE AVAILABLE WITHOUT
WARRANTY OF ANY KIND EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND
FURTHER INCLUDING NO WARRANTY AS TO CONFORMITY WITH WHATEVER SOFTWARE MAY BE
DISTRIBUTED FROM TIME TO TIME.
COPYRIGHT NOTICE
Copyright © 1994-2002 by NC State University. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any other language or computer language in whole or in part, in any form or by any means, whether it be electronic, mechanical, magnetic, optical, manual or otherwise, without the prior written consent of NC State University.
TRADEMARK AND SERVICE MARK NOTICES
HADSSTM and PocketHERBTM are trademarks of North Carolina State University
Microsoft®, Windows 95®, Windows 98®, Windows 2000®, Windows ME®, Windows NT®, and Windows XP® are registered trademarks of Microsoft Corporation.
WHAT’S INCLUDED
Software: HADSS
Databases: Databases have been developed for specific crops and states. When you purchased your copy of HADSS™, you specified a specific state database. This will be the only database available in your copy of HADSS™. Currently available databases are listed below, but others may become available after publication of this user's manual.
Georgia–peanut (postemergence) and cotton (postemergence, postemergence directed); corn (preplant incorporated, preemergence, postemergence, postemergence-directed) and soybean (preplant incorporated, preemergence, postemergence).
Mississippi–soybean (postemergence).
North Carolina–peanut (postemergence) and cotton (postemergence, postemergence directed); corn (preplant incorporated, preemergence, postemergence, postemergence-directed) and soybean (preplant incorporated, preemergence, postemergence).
Ontario-corn (preplant incorporated, preemergence, postemergence, postemergence-directed) and soybean (preplant incorporated, preemergence, postemergence).
What does HADSS do?
I. New Features of HADSS 2002
II. Operating System and Hardware
Requirements
III. Installation Basics
IV. Starting HADSS
V. Running HADSS
VI. Creating a New Field
VII. Editing Field Information
VIII. Field Scouting for Weed
Populations
IX. Weed Size Determination
X. Determining Soil Moisture Status
XI. Factors Affecting PPI and PRE
Efficacy
XII. Using the
Recommendation and Alternatives
XIII. Herbicide Resistance Management
XIV. Exchange of Field Data Between HADSS and
Pocket HERB and Transfer of Herbicide Prices from HADSS to Pocket HERB
XV. Technical Support
HADSS, the Herbicide Application Decision Support System for field crops, is a program designed to help producers, extension agents, and consultants evaluate alternative weed management strategies. The program allows users to compare the efficacies and economic returns for preplant incorporated (PPI), preemergence (PRE), postemergence (POST), and postemergence directed (PDS) herbicides. Tank mixes are included when appropriate. HADSS makes recommendations for a wide range of weed species in soybean, corn, cotton, and peanut. Crops and applications type vary depending on the installed state database.
HADSS is intended to be used both as a preseason planning aid and as a within-season decision aid. When considering PPI and PRE treatments, the user will have to estimate weed population densities before the weeds have emerged. These estimates could be based on previous field history or scouting done during the previous season. Given the large amount of uncertainty about weed populations prior to emergence and uncertainty about future growing conditions which will affect weed growth and efficacy, results should be viewed with caution. Alter weed population densities to see how sensitive the recommendations are to these factors.
HADSS can also be used to make within-season POST herbicide decisions. Suggested scouting procedures are included in the section Field Scouting for Weed Populations. Also, scouting procedures need to take into account any planned cultivations.
Users are also cautioned to remember that the values entered for expected weed-free yield and crop-selling price have a direct effect on the recommendation. Many things can affect both yield and selling price between the time the herbicide decision is made and the end of the season. Try both optimistic and pessimistic yield and price values to determine the effect on recommendations.
It is hoped that HADSS will prove to be a valuable planning tool, providing an easy means of evaluating the effects of a mixed population of weeds on crop yield and of identifying those herbicides that will provide effective and economical control of those weeds. We have tried to supply sufficient information for the user to understand why a particular recommendation is made.
HADSS makes weed control recommendations, but the decision always resides with the decision maker. You should evaluate program recommendations in the light of your own experience and of advice and information received from other sources. Check product labels carefully prior to application of any chemical.
Crop technology has been moved from the field tab to its own tab and an entry field for technology fee has been added for use in pre-season planning.
Some limited on-line help has been added to the data input screen.
Databases for crops have been updated, new herbicides added where necessary, obsolete herbicides and treatments removed, and herbicide prices have been updated to best reflect costs for the upcoming growing season.
A data transfer interface has been included to allow the user to move data from Pocket HERB to HADSS and vice-versa. This will allow users to transfer data from hand-held computers to laptop and desktop computers running HADSS.
II.
Operating System and Hardware Requirements
HADSS is designed to run under Windows 95, 98, ME, NT, 2000, or XP. It will not run under Windows 3.1x or MS-DOS.
HADSS requires:
- 30 MB of hard disk space
- minimum 800 by 600 screen resolution
- at
least a Pentium 90 processor.
An installation program is included on the CD-ROM. Make sure all other programs are closed during installation. Once the CD-ROM has been inserted in the drive, installation will begin automatically and the installation window will appear. If you have HADSS Version 2001 installed on your computer, you will have to uninstall it prior to installing HADSS Version 2002. This will not remove the database of grower and field information that you created last year; it will still be available after installation of HADSS Version 2002. However, if you have an earlier version of HADSS installed on your computer, installing HADSS will result in the deletion of your previous database. Contact tech support for upgrade assistance.
If the installer does not start automatically:
1. click Start on the task bar
2. choose Settings
3. choose Control Panel
4. double-click Add/Remove Programs
5. click Install
You will be asked for a directory name. If you wish to change this from the default, you can do so. The installation program will create a program group called HADSS, and a program icon labeled HADSS. Refer to your operating system manual for instructions for creating a shortcut to HADSS on your desktop.
To uninstall and earlier version of HADSS:
1. click Start on the task bar
2. choose Settings
3. choose Control Panel
4. double-click Add/Remove Programs
5. choose HADSS
6. click Uninstall
Select "Programs" from the "Start" menu. Select HADSS from the next menu. Or, if you have created a shortcut to HADSS on your desktop, you can double click the icon to start HADSS.
After starting HADSS, an introductory screen will appear. After reading this screen, close the screen by clicking the <OK> button at the bottom of the screen.
The screen shown in Figure 1 will appear next. On the left side of the screen is a list of growers and
fields. A sample grower named Smith,
John J. has already been created.
A sample field named Erwin has also been created for this
grower. If you used HADSS 2001,
then the database of grower and field information you created last year should
still be available. The example
below will not necessarily be present, but program operation will be as described
below for all growers and fields.
Figure1. HADSS Field
Screen.
A number of index tabs are displayed on the right side of the screen. The tabs labeled Field, Weed Control, Weeds, Crop Technology, Herbicide Prices and History are active tabs, i.e., click any one of these tabs to view more information about grower Smith.
· Click the tab labeled Field. The data for the field named Erwin is displayed.
· Click the tab labeled Weed Control. The methods of weed control that have been specified for this field are displayed. In this case, POST has been specified.
· Click the tab labeled Weeds. The list of weed species present in this field is displayed along with the population per 100 square feet before treatment.
· Click the tab labeled Crop Technology. The crop technology choices for the selected crop are listed.
· Click the tab labeled Herbicide Prices. Approximate prices for herbicides for the currently selected crop are listed.
· Click the tab labeled History to view a record of herbicides applied to this field in previous years, with the group number indicating mode of action.
The tabs labeled Selected Treatment, Treatment Details and Warnings appear in a lighter shade of gray and do not become active until a treatment has been selected.
Notice that certain labels on this screen are underlined. If you click on an underlined word, a help box will pop up with relevant information. If you are editing information in the box next to an underlined label, press the <F1> key to bring up the help box.
To obtain a weed control recommendation for the field Erwin, click the Run option in the menu at the top of the screen. A Damage Estimate screen will appear, showing expected yield and dollar losses in the absence of weed control. Click the <OK> button at the bottom of the screen to proceed.
The Herbicide Recommendation screen (Figure 2) will appear. This screen displays treatments that are appropriate for the conditions and weed population specified for this field. By default, the treatments are ranked according to Net Return. A list of the treatments ranked according to any of the column headings can be obtained by clicking the column heading. For example, if you are interested in the treatment with the highest efficacy, i.e. lowest yield loss, click the column heading Yield Loss Remaining. The treatment that does the best job of controlling the weeds specified for this field (regardless of cost) will now appear at the top of the screen. The top treatment for net return and the top treatment for yield loss may or may not be the same. Sometimes NO HERBICIDE APPLIED is best economically.
Figure 2. HADSS Herbicide
Recommendation.
More information can be viewed about any treatment in this list by moving the highlight bar over the treatment (either by using the up and down arrow keys or by clicking the treatment with the mouse) and then clicking the <Control Details> button at the bottom of the screen. Click the <OK> button to return to the Herbicide Recommendation screen.
Click the <Compare> button at the bottom of the screen to view the number of weeds remaining after treatment for each weed species in the field. The herbicide recommendations can be sorted according to efficacy on a particular weed by clicking the appropriate column heading. These columns can be resized just as in a spreadsheet program. Move the cursor to the dividing line between two columns or rows and, when a line with arrows appears, shrink or expand the column or row.
Click <Show Label Information> to display label information via the CDMS website. (An active internet connection is required before clicking this button.)
Click <Treatment Warnings> to display any warnings regarding the particular herbicide treatment that has been highlighted.
“Apply” one of the treatments by clicking the <Select> button at the bottom of the screen. This will return you to the main screen with the <Selected Treatment> tab active. This tab contains a summary of information about the selected treatment. Click the tab labeled <Treatment Details> to view information on the amount of herbicide to buy for the size of the field specified.
Briefly, the MAIN MENU options include:
File: Use this option to add a new grower or field, save a new field with the same field information using the <Save As> option, exit the program using the <Exit> option, or print an individual treatment or a list of treatments using the <Print> option. Select <Print Setup> to change the Windows printer setup options (paper size, selected printer, etc.).
Edit: Use this option to rename or delete growers or fields.
Run: If a field is selected on the left side of the screen, then selecting this option starts the calculation and recommendation part of HADSS. The program will not run unless all required field information (e.g. weed-free yield, crop selling price, weed species) has been entered and saved.
Help: Limited on-line help has now been included in HADSS. Click on any underlined label to obtain help related to the item. Click Help and then select About HADSS to view general information about HADSS and to review the license agreement and copyright information. Information is also available regarding how to obtain technical support if you have any problems or questions with HADSS.
Add a Grower
To add a grower, select File from the menu bar at the top of the screen. Then select New, and then Grower. The <Grower> tab will be displayed, where the name, address, and phone number are entered. Click the <Application Costs> tab to enter the default application cost for the new grower. Application cost is the cost of applying the herbicide, NOT the cost of the herbicide or herbicides included in the treatment. Application costs typically range from $3 -$10/acre depending on geographic location and application method. To save this information, select File from the menu bar at the top of the screen, then select Save, or use the Save button at the bottom of the <Grower> tab.
Add a Field
To add a new field, select File from the main menu, then select New, and then Field. Enter a new field name and crop in the designated areas. The field name can be as short or as descriptive as you wish. When finished, click the <OK> button.
Weed Control Method
Click the <Weed Control> tab. There are four weed control methods currently available in HADSS. They are preplant incorporated (PPI), preemergence (PRE), postemergence (POST), and postemergence directed spray (PDS). You can select any one of these or a combination depending on the crops and application methods included in your state database.
Field and Crop Information
On the <Field> tab is information related to the current crop and field (Figure 3). All of this information is necessary for HADSS to run. The box labeled PPI and PRE Information will only appear if either PPI or PRE as a method of weed control has been selected for this field. The boxes labeled Post General Information and Post Directed Information will only appear if POST or PDS treatment has been selected.
Figure 3. HADSS Field Data
Entry.
When an arrow appears next to a box (“dropdown list box”), click the arrow to see the list of available options, or use the up and down arrow keys. You can move from data entry field to data entry field either by clicking the next field or by using the <Tab> key. You can use the up and down arrow keys to view the available entries in any of the list boxes, or use the mouse to click the arrow at the side of the box to bring up the whole list.
For Selling Price and Weed Free Yield you need to enter appropriate values based on your expectations for the field. HADSS is an economic model, in other words, it calculates the monetary benefit of applying a particular treatment based on how well it protects the yield potential (controls the weeds present), and the value of the crop yield that is protected. Please be realistic in the values you select. These values can greatly affect the economic calculations performed by HADSS. Try several different values for selling price and weed-free yield, within the range that you can reasonably expect. This will give you an idea of how sensitive the recommendations are to changes in these factors.
Entering Field Size allows HADSS to calculate the amount of herbicide needed to treat the field area.
Entering Crop Height (when applicable) affects which herbicides can be utilized in a given situation. For example, atrazine may be used over-the-top in corn until the crop reaches a certain height, but not after corn reaches that height. By entering a value for crop height, HADSS can add or remove treatments based on crop height.
Entering a Crop Leaf Number in cotton (defined as the number of true leaves present on the crop at the time of application) can affect which herbicides can be used, and what application method should be utilized. For example, glyphosate can be applied over-the-top of Roundup Readyâ cotton up to the 4-leaf stage, but must be post-directed thereafter.
Entering a Row Spacing and Bandwidth (when applicable) allow HADSS to calculate the appropriate amount of herbicide and the herbicide cost when herbicides are banded. Currently, this feature is active for corn and cotton.
See sections IX, and X of this manual for information concerning weed size determination and soil moisture status.
After entering all information, select File from the menu bar at the top of the screen, then select Save to store the field information.
Crop Technology
Click the <Crop Technology> tab. The list contains the herbicide tolerant or resistant varieties for the crop chosen on the <Field> tab. This allows HADSS to include treatments that utilize those herbicides, as well as conventional herbicides. A technology fee entry field is provided for pre-season planning. Technology fees can greatly affect the economic return for a particular herbicide system. By comparing herbicide tolerant or resistant systems vs. conventional systems based on the weed species you know you have in particular fields, HADSS can help you plan what herbicide system will provide you the highest economic return. It is important to not use the technology fee feature during within-season planning.
Weed Data
The <Weeds> tab is used for selecting weed species present in the field (Figure 4). To select a weed, click the check box beside the name of the weed species. A box will appear in which to enter the number of weeds of the specified species per 100 square foot. See the Section Field Scouting for Weed Populations for information on how best to obtain these numbers.
Figure 4. HADSS Weed
Selection.
The estimates of yield reduction and the data on herbicide efficacy that HADSS provides depend on the types of weeds present, and their population. Weeds differ greatly in how much they reduce yield, depending on the weed, and the crop they are competing with, so correct identification of weeds, and accurate estimation of their population is important to obtaining good recommendations. You can experiment with running individual weed species to see how species differ in their ability to reduce yield. You may also notice that when populations are high, adding additional weeds may not have much effect. This is due to the weeds beginning to compete with each other, in addition to competing with the crop. For extremely high populations, HADSS may actually recommend not to treat at all in some cases. This is because the weeds remaining after treatment may do almost as much damage as the original population. In this case, we recommend that you select a treatment to apply from the list and then reevaluate the situation after treatment. Another herbicide application may further reduce the weed population and economic loss.
A weed can be deleted from the list by clicking the check box next to it. The weed density can be changed by clicking the weed, then clicking the <Edit> button. All weed populations presently in the list can be removed by clicking the <Remove All> button. To quickly locate a weed in the list, enter the name in the Find Weed section of the screen. If the program finds a name in the list that matches, the highlight bar will be positioned over the first matching weed name. Or, click any weed in the list and begin typing the name of the weed to be located. The closest match will be highlighted.
After all information has been entered, select File from the menu bar at the top of the screen, then select Save to store the weed information.
VII. Editing
Field Information
Field Data
To update any of the field data, select the tab containing the information to be modified and make the appropriate changes. Select File from the menu bar at the top of the screen, and then select Save to store the changed data. Select Save As to store the changed data under a new field name and retain the original data under the original field name.
History
When a herbicide is selected on the recommendation form, it is stored as part of each field's history. This information can be modified on the <History> tab (Figure 5). Click the <History> tab to see the current field history. The functions for the History editor are accessed by a right mouse click in the "tree view" on the left side of the screen. The menu options are New application, Edit application and Did not apply. When entering information on past herbicide use, supply the date of application and select a herbicide from the drop-down list. The herbicide group number, indicating mode of action, will be added automatically.
Figure 5. HADSS History of
Herbicide Application.
Herbicide Prices
Click the Herbicide Prices tab. A list of the herbicides for the currently selected crop along with their approximate retail prices will appear. If a herbicide price does not reflect the actual price in your area, then click the herbicide and enter the actual price (Figure 6). Make sure these prices are realistic, since they are critical to the economic calculations performed by HADSS.
Figure 6. HADSS Herbicide
Prices.
Select File from the menu bar at the top of the screen, and then select Save to store the changed data. Select Save As to store the changed data under a new field name and retain the original data under the original field name. Once the changes have been saved, HADSS will use the changed prices in all future sessions. If you click <Reset Prices From Current State Database>, the price list will be updated with the prices from the current state database.
VIII.
Field Scouting for Weed Populations
When considering PPI and PRE control strategies, the weed population densities must be estimated from field histories or by scouting the previous fall. When using HADSS as a within-season decision aid for postemergence weed control, scout the field to determine weed species.
HADSS assumes the number of weeds of each species entered will be controlled by a herbicide and not by cultivation. If the field in question will be cultivated to control weeds between the rows, then only those weeds in the row that will not be removed with the cultivator should be counted. The following have proven to be the best ways to get weed population information for HADSS.
For crops grown in rows: Divide the row width (in feet) into 100 to get the length of row to count. For instance, 36 inch rows (3 feet) into 100 equals 33.3 feet of row to count. For 30 inch rows (2.5 feet), the length of row would be 40 feet. Table 1 lists sampling distances for commonly used row widths.
Absolute measurement of the distances shown in Table 1 is not necessary, but should be accurate to one foot. A measuring tape can be used, or if the scout can accurately measure his stride (usually 3 feet per step), the correct distance can be stepped off. If the field is to be cultivated, count only those weeds that will not be cultivated out. If the field will not be cultivated, count all weeds from row middle to row middle.
Table 1. Row distances to sample for various row
widths in order to obtain a 100 square feet sample.
|
Row Width |
Sampling Row Distance Feet |
|
|
Inches |
Feet |
|
|
10 |
0.83 |
120.5 |
|
12 |
1.0 |
100.0 |
|
16 |
1.33 |
75.2 |
|
18 |
1.5 |
66.7 |
|
20 |
1.67 |
59.9 |
|
24 |
2.0 |
50.0 |
|
30 |
2.5 |
40.0 |
|
36 |
3.0 |
33.3 |
|
38 |
3.16 |
31.6 |
For solid seeded and drilled soybeans: Measure off 100 square feet in any geometric shape convenient to count (we have found it easier to count weeds in a long, narrow rectangle approximately 4 feet by 25 feet). Since cultivation is not practiced in these planting patterns, count (or estimate) all weeds in the specified area
The decisions made by HADSS are based on weeds that emerge at about the same time as the crop. Weeds that emerge more than 2 weeks after the crop may not compete to any significant degree, and HADSS will overestimate the losses associated with these late-emerging weeds. We suggest that field scouting be done around 7 to 10 days after crop emergence with treatments to be applied within a day or two of the scouting procedure.
The number of samples to take in a field is not an easy decision to make. The more samples taken, the better the estimate of the weed population is likely to be. However, there is a point of diminished returns due to the time requirement for sampling. Generally, if fields are fairly uniform with respect to weed infestation, about 10-12 samples per field should suffice. Large fields or fields with non-uniform weed populations may be better served by subdividing those fields into smaller sub-fields with like weed populations.
HADSS gives the best information on those fields with low weed populations where there is a real question about the necessity of herbicide treatment. It can, however, help with recommendations on fields with high populations. Where weed populations are very high, it is impossible to get accurate counts of all weeds. On these fields, an estimate of number of weeds will suffice because as weed numbers increase, the effect per weed decreases to the point where more than 100 weeds per 100 square feet will not add appreciably to the crop loss due to weeds. If weed populations are extremely high, estimate the population as 100 and move on.
Weed size is a major factor determining the relative effectiveness of postemergence herbicides, with smaller weeds being easier to control than larger ones. The three categories of weed size used in HADSS (0-2, 2-4, and greater than 4 inches) relate to the size of the general population of weeds. If the 0-2 inch size is chosen, there should be very few weeds present that exceed 2 inches in height. By the same reasoning, if the 2-4 inch size is chosen, there should be very few weeds present that exceed 4 inches in height. It is obvious that greater than 4 inches is a very broad category. However, if a general weed population is allowed to exceed 4 inches in height, the field is approaching a salvage situation anyway and further size categories are not warranted in most cases. Once weeds are larger than 8 inches, efficacy values in HADSS may no longer be accurate.
When comparing PPI, PRE, POST, and PDS weed control strategies, try different weed sizes for POST and PDS applications in order to determine the effect on the herbicide recommendations. PDS applications will not be recommended if the weed size selected is large, since obtaining adequate coverage of large weeds with this application method is problematic.
X.
Determining Soil Moisture Status
The importance of soil moisture status in HADSS is to help define the activity level, and therefore the rate of application, of the individual herbicides. The postemergence herbicides listed in HADSS are generally more effective when weeds are actively growing. Soil moisture affects weed growth the same as it does crop growth, with most active growth in wet or normal soil moisture. Dry soils in particular slow weed growth and reduce the activity of postemergence herbicides, especially on larger weeds. The definition of soil moisture has been left general in HADSS, but the following guidelines may be used:
Adequate - soil moisture optimum for plant growth with rainfall occurring within the past four to seven days.
Dry - Soil dry enough that weed growth is slowed, usually no rain within the past 10 days.
XI. Factors Affecting PPI and PRE Efficacy
For PPI and PRE treatments, herbicide efficacy depends upon organic matter content and texture of the soil surface layer, in addition to weed species. Organic matter content is divided into four categories: less than 1%, 1 to 3%, 3 to 6%, and greater than 6%. Surface texture is divided into the twelve major textural classes, which can be viewed in the pull down list.
XII. Using the Recommendation and Alternatives
We have done our best to insure that the best economic decisions for a given situation will be presented by HADSS in response to the inputs provided. It should be recognized there are many situations in which several different decisions might provide essentially the same economic benefit to the grower. In our opinion, an alternative recommendation provided by HADSS that differs by not more than 10% from the best decision will be a suitable alternative. In practice, there may be times when an alternative treatment would be more practical than the best decision provided by HADSS. If a suitable alternative herbicide is already on hand, or in the case where several fields can be treated the same, an alternative choice may be the most practical.
Surfactants are included in corn treatments. However, this information is not
provided for soybean or peanut. You
should always check the label for any spray additives required, such as
surfactants, crop oil concentrates, ammonium sulfate, or any other
additives that may be required.
In
many cases, alternative products containing the same active ingredient are
available. Trade and brand names
are used only for information; the use of a trade or brand name DOES NOT
imply approval of any product to the exclusion of others that also may be
suitable.
HADSS does not evaluate the potential for crop injury due to herbicide application under sub-optimal weather conditions or inappropriate crop growth stages. You must evaluate program recommendations in light of your own experience and product label information.
HADSS is a decision aid, not a decision maker. Always consider the recommendations in
the light of your previous experience.
Many herbicide labels have specific warnings and requirements that are
impossible to include in HADSS for all circumstances, so always read
and follow the product label.
XIII.
Herbicide Resistance Management
Repeated use of herbicides with the same mode of action can lead to the selection of herbicide resistant weeds. It is a good management practice to keep field histories of herbicide usage and rotate herbicides in order to delay or prevent the development of resistance. HADSS allows the user to store field histories of herbicide application. It will flag possible resistance problems if the same mode of action has been used in a field for three or more consecutive years.
XIV.
Exchange of Field Data between HADSS and PocketHERB™ and Transfer of Herbicide Prices from HADSS to
PocketHERB
This function allows the user to transfer data to and from hand-held computers running PocketHERB to laptop and desktop computers running HADSS. The user must have Microsoft ActiveSync 3.5 installed prior to the transfer. To transfer field data between HADSS and PocketHERB, select the File menu. Select Exchange and Field Data if you want to transfer information to HADSS from PocketHERB or if you want to transfer field data from HADSS to PocketHERB. You will then need to make sure that your Pocket PC is connected and click yes when prompted. Then click on the grower or field information you wish to transfer in the HADSS section or PocketHERB section (Figure 7). Once the grower or field is selected, use the arrow buttons to complete the transfer. To transfer herbicide prices from HADSS to PocketHERB, select the File menu. Then select Transfer and Herbicide Prices. You will again need to make sure that your Pocket PC is connected and click yes when prompted. You will be prompted when the transfer is completed, then click ok.
Figure 7. Transfer of Field Data between HADSS and PocketHERB.
XV. Technical Support
If you encounter problems running HADSS™ or PocketHERB™ and cannot resolve them using the information provided by this manual, then contact:
AgRenaissance
Software LLC
PO Box 91235
Raleigh, NC 27675
tollfree: 877-518-8030
local: 919-518-8030
fax: 919-518-2166
email: support@hadss.com
If you have problems with weed identification, contact your local extension office. Contact your chemical dealer for information about herbicide availability, prices, label restrictions, and application details.