Posted: Aug 11, 2011 8:49 AM by Lauren Wilson & AP
BATON ROUGE, La. (AP) - The federal government has approved use of a new chemical to control stink bugs on up to 50,000 acres of rice in Louisiana for a study to see whether it works better than the pesticides now in use, the LSU AgCenter says.
Dinotefuran, sold by Mitsui as Tenchu, is being tested because some farmers are seeing signs that stink bugs are becoming resistant to pyrethroid insecticides, entomologist Natalie Hummel said Wednesday.
She said the pesticide is likely to be used most in north Louisiana. "Most of the crop in south Louisiana has passed the point where it would be susceptible to stink bug damage," she said.
In addition, Hummel said, the south reported little problems with stink bugs this year, but some north Louisiana farmers have reported severe damage.
A grant from the Southern Region Integrated Pest Management Center will pay for a milling analysis to compare rice treated with Tenchu to that treated with pyrethroids, Hummel said.
She said other states have found that Tenchu has a residual control of roughly 7 to 10 days. "We are conducting an evaluation to see if that's true in Louisiana."