June 23, 2017

CropWatch June 23, 2017

Weed Management

Weed escapes in soybean after preemergence application
Figure 1. A soybean 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 Application Restrictions of Postemergence Herbicides Based on Soybean Growth Stage

It's important to consider soybean growth stage and preharvest interval when applying postemergence herbicides to avoid potential crop injury. This article describes how to determine crop growth stage and includes a table of application restrictions for common postemergence herbicides.
Palmer amaranth in corn
Figure 1. Glyphosate-resistant Palmer amaranth infesting corn field in south central Nebraska. (Photos by Amit Jhala)

Grower Q&A: Is this Herbicide-Resistant Palmer Amaranth?

This week growers facing challenges with Palmer amaranth questioned whether it was due to the product, the environment and lack of rain, or a resistant weed. Several factors could be at play, notes a UNL weed scientist, who recommends starting with preemergence herbicides with residual activity to get the best control.

Insect Management

Japanese Beetle

Japanese Beetles Emerging in Corn and Soybean

Corn and soybean growers should be scouting for Japanese beetles, which have started emerging in eastern Nebraska. First identified in counties along the state's eastern border several years ago, the beetles were found as far west as Lincoln County in 2016.
Differential grasshopper

They're Back ... Time to Scout Field Borders for Grasshoppers

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.
Wheat stem maggot fly

Adult Emergence of Suspected Wheat Stem Maggot from Infested Corn Plants

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.
Mosquito on skin
Figure 1. Manage mosquitoes to protect your health.

Manage Standing Water to Reduce Mosquito Disease Threat

Managing the potential for mosquito breeding and populations on your farm can help protect you and your family from a number of diseases, including West Nile Virus. An entomologist offers information on mosquitoes and recommendations for reducing your risk.

Research

On-farm research field

Field Studies: Setting Up a Trial

Reliable results from on-farm research often start with correct placement of randomized, replicated plots in your field. Soil type, topography, and other factors all need to be considered to ensure results are representative of the whole field.

Crop Reports & Market Journal

Corn at the Roger's Memorial Farm near Lincoln

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

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.
Market Journal

Market Journal Takes to the Air to Test Aerial Applications, Looks at Wheat Stem Maggot in Corn

This week's program includes segments on Project SAFE for aerial applicators, recent findings of wheat stem maggots in corn, grain market trends, harvesting grasses and the forecast for next week.

IANR & Extension

Chris Proctor presenting to farmers
Figure 1. Chris Proctor, Nebraska Extension weed science educator, presents considerations for interseeding cover crops in corn at one of the 2016 Crop Management Diagnostic Clinic. (Photos by Deloris Pittman)

4 Summer Clinics to Target Timely Crop Production Topics

Get hands-on training on soil health, precision agriculture, soybean production and corn production at this year's Nebraska Extension Crop Management and Diagnostic Clinics. The four all-day learning events will include field demos and training, research updates, and opportunities to discuss topics with key experts.

Research Updates

Alfalfa & Forage Production

Farm Management

More IANR & Extension Events