Corn

Also see: Corn
Wheat stem maggot fly

Adult Emergence of Suspected Wheat Stem Maggot from Infested Corn Plants June 22, 2017

University researchers are studying why suspected wheat stem sawflies are being found again this year in Nebraska corn, previously thought to be a non-host. Major yield loss is not expected in corn from this pest.

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How Fast Do Corn Roots Grow? ISU is Taking a Look June 22, 2017

Have you ever wondered how fast corn roots grow? Colleagues at Iowa State University have a number: more than 2 ¾ inches per leaf stage. That's about one inch per day!  Soil cores were taken in the row and in the center between two rows. They used the cores to identify the presence of roots (depth and lateral growth).

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Differential grasshopper

They're Back ... Time to Scout Field Borders for Grasshoppers June 22, 2017

Populations of immature grasshoppers have been reported in areas bordering crop fields. If you're seeing one of the four species that harm cropland noted here, control may be warranted. Treatment is most effective when grasshoppers are small and still contained in field borders.

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Corn at the Roger's Memorial Farm near Lincoln

Nebraska Crop Conditions (NASS, 6/19/17) June 19, 2017

Nebraska corn condition rated 78% good to excellent, soybean rated 72% good to excellent, and wheat rated 51% good to excellent, according to the June 18 report from USDA NASS.

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center pivot irrigation

How Much Irrigation is Needed on Corn in the Vegetative Growth Stage? June 16, 2017

Strategies to time crop irrigation for maximum effectiveness suggest delaying irrigation until the critical reproductive growth stages will most benefit yield. This will also help reduce the potential for nitrate leaching.

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Bacterial leaf streak lesions of corn

Bacterial Leaf Streak Confirmed on V4 Corn in Nebraska June 15, 2017

Bacterial leaf streak disease has been confirmed on a sample submitted to the UNL Plant and Pest Diagnostic Clinic from Adams County. The corn was at the V4 growth stage and represents the earliest that the disease has been confirmed in a field.

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Western bean cutworm eggs and larva

Using Degree-Day Models to Predict Western Bean Cutworm Flights June 15, 2017

Learn how degree-days are calculated and used to predict insect development and specifically, what they indicate for the timing of western bean cutworm development in Nebraska this year.

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Corn field with severe weed population
Figure 1. A corn field in south central Nebraska without preemergence herbicide application. Applying a well-timed postemergence herbicide will be the only control option. (Photos by Amit Jhala).

Consider Corn Growth Stage When Applying Postemergence Herbicides June 14, 2017

When applying postemergence herbicides, consider corn growth stage, weed species present, and crop and weed heights. The article includes how to determine corn growth stage, recommendations to avoid problems, and a table of application restrictions for common postemergence herbicides.

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