COTTON HADSS (HERBICIDE APPLICATION DECISION SUPPORT SYSTEM) FOR GEORGIA

Authors: WEBSTER, THEODORE; CULPEPPER, A - UNIVERSITY OF GEORGIA; WILKERSON, G - NC STATE UNIVERSITY

Submitted to: Computer Model: Decision Support System
Publication Type: Abstract Only
Publication Acceptance Date: 5/1/2002
Publication Date: 10/1/2002
Citation: Webster, T.M., Culpepper, A.S., Wilkerson, G.G. 2002. Cotton HADSS (Herbicide Application Decision Support System) for Georgia [abstract]. Available: http://www.cropsci.ncsu.edu/webhadss/georgia.asp.

Interpretive Summary:

Technical Abstract: Many factors must be addressed when making weed control decisions, including information on weeds (e.g. species present, weed density, weed competitiveness, plant size) crop (e.g. potential yield, selling price), and herbicides (e.g. efficacy in controlling a particular weed species, cost of herbicide and application). Due to the complexity of these choices, a computer model is best suited to guide a grower in making an economically justified weed control decision. Such a model, Cotton HADSS, has been developed and validated for Georgia cotton. Growers will need to enter estimates of weed densities per 100 square feet for each of the major weed species in the field. The grower will also enter estimates of weed size, crop size, potential crop yield, estimated selling price, and soil moisture (adequate or dry). HADSS calculates the expected yield loss from these weeds if a weed control program is not implemented and provides weed control recommendations. These recommendations are based on weed control data from the southern U.S., but have been altered by the coauthors to reflect Georgia cropping systems. Through validation studies, we have demonstrated that this model makes weed control recommendations that are similar to those from Georgia Extension Specialists. The model is available at www.cropsci.ncsu.edu/webhadss/georgia.asp.