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6 paź 2015 · The goal is to avoid planting before adult Hessian flies die, to prevent them from laying eggs in wheat fields. Below is the table of fly-free dates for Illinois counties.
Hessian fly adults emerge in late summer and early fall. The fly-free dates typically occur after peak emergence of the fly. By planting wheat after the fly-free date, the egg-laying females are not able to find a suitable host, so they die without laying a full complement of eggs.
The fly-free dates range from September 17-20 for counties along the Illinois-Wisconsin border to October 11-12 in far southern Illinois. To better understand the importance of the fly-free date, let's discuss some characteristics of the Hessian fly.
The fly-free date begins as early as September 17 in northern Illinois, and as late as October 12 in the southernmost counties of the state. The exact date for your location can be found in the Illinois Agronomy Handbook, available at any county U of I Extension office.
Planting dates for wheat cover crops will observe the Hessian Fly free dates shown in the current Illinois Agronomy Handbook. Conservation practice standards are reviewed periodically and updated if needed. To obtain the current version of this standard, contact your Natural Resources Conservation Service.
after the adults of the fly died was an effective management technique. There is now genetic resistance to this pest in some wheat varieties, but the “Hessian fly-free date” was found to be a good time to plant wheat from an agronomic standpoint as well. The best time to plant wheat is the one
9 wrz 2023 · Looking for a 1st attempt at planting winter wheat (Nu East Hard), winter rye (Common), and barley (Purple Karma) this fall. Wondering about the Hessian Fly Free Dates and any other tips about ideal planting times.
