Old World bollworm may be worse than New World bollworm

In AgriLife Today

Texas A&M AgriLife entomologists are advising producers about the possible arrival of a potential major new pest of field crops and vegetables in the U.S. if its ominous track-record in other countries is any indication.

The pest is the Old World bollworm, Helicoverpa armigera, and was recently detected in Florida. This is the first record of it in the continental U.S. after being discovered in Brazil in 2013, said Dr. Charles Allen, Texas A&M AgriLife Extension Service state integrated pest management leader in San Angelo.

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Study shows Bt trait in corn having reduced effectiveness

By Matt Shipman, NC State University

A new study from North Carolina State University and Clemson University finds that the toxin in a widely used genetically modified (GM) crop is having little impact on the crop pest called corn earworm (Helicoverpa zea) – which is consistent with predictions made almost 20 years ago that had been largely ignored. The study may be a signal to pay closer attention to warning signs about the development of resistance in agricultural pests to GM crops.

At issue is genetically engineered corn that produces a Bacillus thuringiensis (Bt) protein which, in turn produces a toxin called Cry1Ab. This GM corn was originally designed to address a pest called the European corn borer (Ostrinia nubilalis) and went on the market in 1996.

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Mississippi researchers receive grant to research corn earworm

In Delta Farm Press

Jeff Gore, research entomologist at Mississippi State University’s Delta Research and Extension Center, is one of six scientists who have been selected to receive grants through Monsanto’s Insect Management Knowledge Program.

The program, which started in 2013 as the Corn Rootworm Knowledge Program, provides merit-based awards of up to $250,000 per award per year for up to three years for research that the company says “will not only enhance the collective understanding of insect management but help address significant challenges in agriculture.”

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How Do You Control Corn Earworm? Wake ‘Em Up!

A team of scientists in Ohio has discovered a new way to control Helicoverpa zea, or corn earworm. They have developed a chemical that interrupts the insect’s dormancy.

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Researchers Validate Resistance Management Practices for Bt-crops

Crops genetically engineered with the toxin Bacillus thuringiensis (Bt) have been grown in the United States since 1996. Since then, concerns about pest resistance have grown, mainly because of observed resistance of the cotton bollworm (Helicoverpa zea), a major pest of cotton. According to a 2009 published study in the Journal of Economic Entomology, insect resistance to Bt can be monitored and prevented.

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