Ag Notes




WILL - Ag Notes - May 01, 2014

More Illinois Counties Confirmed Cry3Bb1 WCR Resistant

by Todd E. Gleason

The resistance is getting stronger in Illinois. It's been just over a decade since the introduction of Bt hybrids capable of fending off the western corn rootworm. University of Illinois Extension Entomologist Mike Gray says six counties in the state are affected, with more to come.

Categories: Agriculture

WILL - Ag Notes - April 30, 2014

Palmer Amaranth Untreatable 10 Days after Emergence

by Todd E. Gleason

University of Illinois Weed Scientist Aaron Hager is urging farmers to diligently control a new weed species in the state. Palmer amaranth plants reached a 4-inch height less than 10 days after emergence. Palmer is very hard to control after it is taller than four inches. You can read more from Aaron Hager on the weed in The Bulletin.

photo comparing the growth rate of waterhemp vs palmer amaranth
This greenhouse demonstration compares the growth rate of  palmer amaranth compared to waterhemp at 4 days post emergence and 16 days. Palmer becomes nearly untreatable after reaching a height of 4 inches, usually less than 10 days after emergence.
Categories: Agriculture





WILL - Ag Notes - April 24, 2014

Bt Resistance Rant

by Todd E. Gleason

April 3, 2014 Mike Gray posted a note into the University of Illinois IPM bulletin about the addition of three more counties to the Yieldgard resistant western corn rootworm saga. The Entomologist also reprimanded the industry for not taking academic recommendations on management of GMO products seriously a decade ago. You may the read the FULL ARTICLE here, and an excerpt below.

"While the greater implementation of best management practices is a step in the right direction — let’s be clear, these practices should have been in place when Bt corn rootworm hybrids were first used over 10 years ago. Accelerated reliance upon the pyramided Bt rootworm products with reduced seed blend refuges will not solve this resistance management challenge. Increased use of soil insecticides, along with Bt rootworm hybrids, will likely only exacerbate resistance development. As I have done in the past, I urge producers to implement a long-term integrated pest management approach for corn rootworms. This includes the use of multiple tactics (over time, not all in the same season), such as: use of a more diverse crop rotation system, use of a non-Bt hybrid in conjunction with a planting-time soil insecticide, rotation of pyramided Bt hybrids, and consideration of an adult suppression program in heavily infested fields."

Categories: Agriculture

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