Bug Scout 1979
Switch Insecticides with Moderation
(Tom Turpin, Entomologist, Purdue University)
Does this mean you'd rather fight than switch?
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February 17, 1979

Should you switch rootworm insecticides this year?  Recommendations throughout the Cornbelt vary.

First, consider the need for rootworm control.  Then if an insecticide is needed, how good was the performance of your insecticide last year?

If it was poorer than in previous years, a switch could be profitable.  Remember to switch between types of insecticides, such as organophosphates and carbamates.

Generally, switching insecticides from year to year is not a desirable long-term practice.  It usually means rootworms will become resistant to both products.  Then control will be even more difficult.  If you decide to switch, switching with moderation is sound advice.

by Tom Turpin, Entomologist, Purdue University

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