Bollworm pest shows signs of resistance to latest GMO Bt corn, cotton in southern US

H zea épi maïs bis
Image: CSIRO

Also known as the corn earworm, the cotton bollworm has spent the last decade steadily evolving resistance to most of the corn and cotton Bt proteins on the market that target it.

Now, entomologists across the South are reporting increased feeding and survival in Bt corn and cotton fields expressing the Vip3A protein, once believed to be the final Bt stronghold against this pest. Texas scientists are testing some of these suspect bollworm populations for resistance.

In the past few years, researchers have documented resistance in the bollworm/earworm to some of the older Bt Cry proteins found in three-gene cotton varieties (Bollgard 3, TwinLink Plus and Widestrike 3) and pyramided corn hybrids (Viptera, Leptra and Trecepta). That has put tremendous selection pressure on the Vip3A protein in these varieties and hybrids, entomologists told DTN.

Related article:  Viewpoint: International science communicator warns crop biotech proponents not to oversell its benefits to wary consumers

Read full, original article: Bollworm Battle Continues

Outbreak
Outbreak Daily Digest
Biotech Facts & Fallacies
Talking Biotech
Genetics Unzipped
Infographic: What are mRNA COVID-19 vaccines and how do they work?

Infographic: What are mRNA COVID-19 vaccines and how do they work?

As of 1 December 2020, thirteen vaccines have reached the final stage of testing: where they are being given to ...
favicon

Environmental Working Group: EWG challenges safety of GMOs, food pesticide residues

Known by some as the "Environmental Worrying Group," EWG lobbies ...
m hansen

Michael Hansen: Architect of Consumers Union ongoing anti-GMO campaign

Michael K. Hansen (born 1956) is thought by critics to be ...
News on human & agricultural genetics and biotechnology delivered to your inbox.
glp menu logo outlined

Newsletter Subscription

Optional. Mail on special occasions.
Send this to a friend