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Issue No. 2/April 6, 2012

Black Cutworm Moths Abundant and on the Move
Producers should look for early signs of leaf-feeding injury that could signal potential cutting of corn plants by black cutworm. Don't be lulled into complacency if you planted a Bt hybrid; control may be inadequate if infestations are heavy.

Bt Use and Refuge Implementation: Expected Patterns for 2012
Despite low numbers of key insect pests in Illinois fields for several years, intense use of Bt hybrids is expected to continue. Many producers are also adopting refuge-in-a-bag strategies.

Growth Regulator Herbicides for Burndown Applications
Guidelines are provided on using growth regulator herbicides, including 2,4-D and dicamba, for burndown applications to control weed vegetation before planting corn or soybean.

Multiple vs. Effective Modes of Action
Just because a product has multiple modes of herbicide action doesn't mean each component will be effective against the target. Effectiveness is influenced by weed species, application timing, and herbicide resistance profile.

Stripe Rust of Wheat Moving Northward
With stripe rust of wheat having been reported in southeastern Missouri and in Arkansas this spring, producers should scout wheat fields for the disease.

Now Is It Time to Plant?
Though frost that would kill or damage emerged corn remains possible, the concern now diminishes each day; planting should accelerate quickly over the next week.