Iowa: Corn Earworm Activity Picks Up Sep 24, 2019

🕔Sep 24, 2019Corn earworm  is common in Iowa corn. It is a migratory pest, migrating from the southern and southeastern U.S. every summer. There are two general fights to the Midwest every […]

Iowa Corn: Assessing Rootworm Activity Using Sticky Traps Jul 26, 2019

🕔Jul 26, 2019Western and northern corn rootworm are major corn pests in Iowa and surrounding states (Photos 1 and 2). Farmers have seen several management changes, including the release of four Bt-rootworm […]

Iowa Soybeans: Thistle Caterpillars on Their Way Out? Jul 24, 2019

🕔Jul 24, 2019Today for the first time this summer, I started to notice a few thistle caterpillars that didn’t look quite right. Some were very dark, some look deflated and some were […]

Soybeans: Keep Scouting for Insects – Especially This Year – DTN Jun 25, 2019

🕔Jun 25, 2019Only about half of the country’s soybeans have emerged, but some insect pests are already out and about, waiting for them. Entomologists and agronomists have reported sightings of soybean aphids, […]

Iowa: Corn Rootworm Egg Hatch Peaking in Southern Counties Jun 19, 2019

🕔Jun 19, 2019Corn rootworm egg hatch in Iowa typically occurs from late May to the middle of June, with an average peak hatching date of June 6 in central Iowa. In 2019, […]

Iowa Corn: Scout Fields for Stalk Borers Jun 19, 2019

🕔Jun 19, 2019Within the last week, I have heard about higher-than-normal stalk borer infestations along field margins compared to previous years. According to degree-day tracking of 2019, the caterpillars should be moving […]

Iowa Soybeans: Scouting Guidelines for Defoliators Jun 19, 2019

🕔Jun 19, 2019The most effective way to make treatments decisions for pests with chewing mouthparts (e.g., Japanese beetle, bean leaf beetle, caterpillars, and grasshoppers) is to estimate defoliation. I’m a “lumper” and […]

Iowa: Japanese Beetles Get a Slow Start to 2019 Jun 19, 2019

🕔Jun 19, 2019Several reports from ISU Field Agronomists have indicated Japanese beetles are emerging in southern Iowa. The emergence is about 7-10 days behind the last few years, due to slowly accumulating […]

Soybean Gall Midge Confirmed in Iowa and Nebraska Jun 17, 2019

🕔Jun 17, 2019Last year, the widespread outbreak of soybean gall midge took many farmers and entomologists by surprise. There was significant field edge injury and economic loss in at least 65 counties in Iowa, […]

Iowa: Black Cutworm Moth Counts Jump “Significantly” In Multiple Counties May 15, 2019

🕔May 15, 2019This week we begin Week 7 of moth trapping in Iowa. Significant captures of black cutworm (BCW) have occurred in several counties during weeks 3-6 of trapping (bold and * […]

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