Bayer Crop Science staff say corn production success for Ontario growers includes rotation out of corn, and rotating modes of action when fighting insect pests in the crop.
Tag Archives Pesticide resistance
Keep corn rootworm off balance
Hitting it with the same solution year-after-year will just create a new problem
Heads-up on preserving corn borer-resistant corn
Bt breakdown highlights the importance of following refuge protocols
The first case of European corn borer resistance to Bt corn underscores the need for Manitoba corn growers to take steps to protect the technology, says Manitoba Agriculture’s entomologist John Gavloski. That development was recently confirmed in Nova Scotia. “If corn growers are growing Bt (corn borer)-resistant corn they need to be taking the refuge
Ag in Motion: Managing herbicide resistance
Diversity is defined in the dictionary as “the condition of having or being composed of differing elements.” In weed control, diversity means using multiple strategies, or an integrated weed management approach. For herbicides, this means using all of the modes of action available to reduce the risk of weed resistance. This may be obvious, but
Palmer amaranth resistance more complex
Two new mechanisms for herbicide resistance have been found in Palmer amaranth
Scientists are continuing to discover just what a difficult foe the weed Palmer amaranth can be. It can cause yield losses as high as 80 per cent for soybean growers and has already developed resistance to six classes of herbicide since its discovery in North America 100 years ago. It’s recently been found in North
More corn rootworm found in Manitoba
It’s already a major pest in the U.S. Corn Belt, but it can still be easily controlled here
There’s another reason not to grow corn on corn in Manitoba: corn rootworm. The insect, which as its name implies, feeds on corn roots and is a major pest in the American Corn Belt, is showing up in greater numbers in Manitoba. But Manitoba Agriculture entomologist John Gavloski says there’s an easy fix: crop rotation.
Heading off Group 2-resistant weeds
It’s complicated, but picking the right rotation of crops and chemicals is key to avoiding multiple resistance
Many common crop rotations in Manitoba are selecting for Group 2 herbicide resistance, as well as pushing resistance to other herbicide groups, says a U.S. weed specialist. Jeff Stachler of Ohio State University’s Auglaize County Extension Office told the recent Manitoba Agronomists Conference that a good rotation, not just of crops, but also of herbicides
Genetically modified diamondback moth offers pest control hope
The modified moths can mate as well as any other but they only produce male offspring
Scientists in Britain say they have developed a way of genetically modifying and controlling an invasive species of moth that causes serious pest damage to cabbages, kale, canola and other similar crops worldwide. In what they said could be a pesticide-free and environmentally friendly way to control insect pests, the scientists, from the Oxford University
‘Pyramid’ approach to bug control may be too optimistic
Selection for resistance to one Bt toxin often causes cross-resistance to another
University of Arizona scientists say developers of transgenic insect-resistant crops may be a bit too optimistic about their success. Since 1996, more than a cumulative total of a billion acres worldwide have been planted with crops incorporating the Bacillus thuringiensis (Bt) toxin to control rootworm and other pests. Writing in the journal Nature Biotechnology, the
Old chemistry conscripted in battle with herbicide-resistant weeds
It’s an expensive fight in Europe that farmers here can expect to have if they don’t adjust first
Avadex and Fortress are old soil-applied, pre-emergence herbicides with a new purpose — helping delay the onset of herbicide-resistant weeds. And fall is the right time to apply both, herbicide retailers were told at a meeting here Sept. 22 held by Gowan Canada. Manitoba already has some herbicide-resistant weeds, including glyphosate- and Group 2-resistant kochia
Potato beetle resistance brewing in Manitoba fields
Farmers should be scouting early in the season and switching to alternative products if they suspect resistance
Andrew Ronald has spent a lot of time in recent months talking to Manitoba potato growers about a familiar pest problem that could soon be taking on a new prominence. The Keystone Potato Producers Association agronomist says there’s growing evidence that Colorado potato beetle — the most significant insect pest of potato crops in Manitoba
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