Submitted to: Weed Science Society of America Meeting Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: October 3, 2002
Publication Date: February 13, 2003
Citation: Collins, R.T. 2003. Development of current herbicide spray solution for the control of coca [abstract]. Weed Science Society of America Meeting Abstracts.
Between 1995 and 1997, extensive research was conducted to find the best surfactant system for glyphosate for control of coca (Erythroxylum coca var coca L). Two surfactant systems were found that increased the activity of glyphosate. Near the end of the project, the herbicide used was changed from original glyphosate formulation to the current most common glyphosate. Field verification (October 1997) of the effectiveness of the eradication program indicated that there was a major need for the addition of a surfactant to the herbicide solution. An extensive search of Colombian approved agrichemicals produced two surfactants, which appeared to have properties similar to the best surfactant from prior Hawaiian research. The selected surfactants (Cosmo-Flux 411F and Inex-A) underwent preliminary aerial application testing. The surfactants greatly increased the activity of glyphosate in controlling coca. The aerial application studies were followed by detailed concentration studies at our Hawaiian tropical research site. The Hawaiian studies verified the results from the aerial application studies.