UGA plant pathologist cautions Georgia grape growers against fungicide resistance to downy mildew

By Clint Thompson, University of Georgia

Fungicide resistance to downy mildew disease is a growing concern for Georgia grape producers. University of Georgia Extension Fruit Disease Specialist Phil Brannen advises growers to modify their fungicide applications to combat the increasing resistance.

“If producers properly rotate the chemical ingredients (used in the different fungicides) that treat for downy mildew, this will help our chemical classes be sustainable for years to come,” Brannen said. “We have already essentially lost one of our fungicides — the quinone outside inhibitors (Qol) — and we simply can’t afford to lose more classes if we are to manage this aggressive disease in the future.” Continue reading

Pesticide Resistance Needs Attention, Large-Scale Study

To slow the evolutionary progression of weeds and insect pests gaining resistance to herbicides and pesticides, policymakers should provide resources for large-scale, landscape-level studies of a number of promising but untested approaches for slowing pest evolution. Such landscape studies are now more feasible because of new genomic and technological innovations that could be used to compare the efficacy of strategies for preventing weed and insect resistance.

That’s the takeaway recommendation from a North Carolina State University review paper addressing pesticide resistance published today in the journal Science. Continue reading

Register for the 9th International IPM Symposium today

Pollinator protection, biopesticide technology, and resistance management will be featured at the 9th International Integrated Pest Management (IPM) Symposium, March 19-22, 2018 at the Renaissance Baltimore Harborplace Hotel in Baltimore, Maryland USA. The symposium is the premier global event for networking with leading scientists and learning the latest technologies for effectively managing pests. Those who register by February 19 will pay a reduced price. https://ipmsymposium.org/2018/registration.html  Continue reading

Pesticide resistant, crop threatening whiteflies found in Texas

by Adam Russell, Texas A&M AgriLife

A pesticide-resistant population of common plant-damaging whiteflies has been found in Texas, according to a Texas A&M AgriLife Extension Service specialist.

Whiteflies are sucking, insect pests similar to aphids, and damage ornamental and food plants, said Erfan Vafaie, AgriLife Extension program specialist in integrated pest management, Overton. Adults are winged while young whiteflies lie flat against leaves and can be difficult to see with the naked eye.  Continue reading

EPA Guidance on Managing Pesticide Resistance

EPA has released two Pesticide Registration Notices (PRNs) aimed at combating pesticide resistance.

  • PRN 2017-1, “Guidance for Pesticide Registrants on Pesticide Resistance Management Labeling” offers general guidance on resistance management labeling for all conventional agricultural insecticides, fungicides and herbicides.
  • PRN 2017-2, “Guidance for Herbicide Resistance Management Labeling, Education, Training, and Stewardship” focuses specifically on herbicides and provides guidance on labels, terms of registration, education, training and stewardship.

Continue reading

Why did my fungicide fail?

In Southeast Farm Press

Plant pathologist Bob Kemerait offers five reasons why fungicide programs fail.

It’s one of the most common questions I get during the back-half of the growing season: “Why didn’t my fungicide work?” Continue reading

Crop Protection Contributions toward Agricultural Productivity

The Council for Agricultural Science and Technology (CAST) is releasing an issue paper titled Crop Protection Contributions toward Agricultural Productivity–a paper in the series on The Need for Agricultural Innovation to Sustainably Feed the World by 2050. The presenter will be Dr. Susan Ratcliffe, task force chair of the project and director of the North Central IPM Center at the University of Illinois.

Pre-register here.

The authors of the paper examine the current plant protection revolution that is driven by the biological realities of pesticide resistance, various market forces, and real or perceived side effects of pesticides, while stressing the need for new technologies and an integrated cropping systems approach.

CAST Issue Paper 58 will be available April 5 as a free download from the CAST website, cast-science.org/publications. Continue reading