Role of Generic Pesticides in Managing Resistance: An updated perspective CPDA AIC Meeting May 2012 Expert Panel Discussion: Bryan Young, Ph.D. Philip Westra, Ph.D. Jake Brodsgaard Moderator: Gregory Lindner
Dec 16, 2015
Role of Generic Pesticides
in Managing Resistance:
An updated perspectiveCPDA AIC MeetingMay 2012
Expert Panel Discussion:Bryan Young, Ph.D.Philip Westra, Ph.D.
Jake Brodsgaard
Moderator: Gregory Lindner
Introduction
• Managing the emergence of resistance has been an important part of agriculture for decades
• The problem is not unique to any one pesticide type and has remained relevant to fungicides, insecticides, and herbicides
• So what is different now?
Combination of expanding GMO use with increased reliance on a narrower
range of pesticide actives is fostering emergence of new
resistant pests.
Focus: Fungicide Resistance
Fungicide Resistance Action Committee
Composition: Primarily basic research companies, CropLife
Focus: Insecticide Resistance
Insecticide Resistance Action Committee
Composition: Basic research companies, generics, others
Useful resources with special emphasis on managing resistance in Bt crops
WSSA - Weed Science Society of America
Excellent source for statistical data on resistant weeds
Significant links to sources, databases, and associated websites
Focus: Herbicide Resistance
Herbicide Resistance Action Committee
Composition: Basic research companies, generics
Links closely with WSSA site
International Survey of Resistant Weeds
Source: www.weedscience.org,
Ian Heap, March 2011
Global Distribution of Herbicide Resistance
Source: www.weedscience.org, Ian Heap, March
2011
This figure shows the number of herbicide-resistant biotypes around the world. Biotypes are unique cases of herbicide-resistance in weeds separated by geography. Because of this definition, the number reported by biotype will always be greater than the number reported by weed species.
[Click to close.]
Current Status of Resistance
ALS-inhibitors
Triazines
ACCase-inhibitors
Glycines
The legend identifies herbicides by both mechanism of action and class. Mechanism of action (MOA) is the biochemical site within a plant with which a herbicide directly interacts. Herbicide class refers to herbicide chemistry.
[Click to close.]
Source: www.weedscience.org, Ian Heap, March
2011
Glyphosate-Resistant Weeds
March 2012
Sites: Orchards, vineyards, canals, agronomic crops
Weeds: Annuals, perennials, grass, broadleaf Unlike previous herbicide-resistant weeds Potential for rapid spread once developed
Source:
www.weedscience.org, Ian
Heap, March 2011