Soybean stem borer larva
Soybean stem borer larva

Soybean Stem Borers Feeding in South Central Nebraska August 16, 2016

We are starting to see dead leaves caused by feeding of soybean stem borer larvae in south central Nebraska soybeans. No control measures are appropriate at this time, but monitor your fields and be aware that high populations of soybean stem borers may predispose the field to lodging and make harvest difficult.

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Figure 1. Twospotted spider mites on a leaf and in a web. Often spider mites may be almost imperceptible on a leaf, but before more visible against their silk-like webs. (Photos by Jim Kalisch)
Figure 1. Twospotted spider mites. Almost microscopic in size, the spider mites may be imperceptible on a leaf, but become more visible against its silk-like webs. (Photos by Jim Kalisch)

Managing Spider Mites in Corn and Soybean August 11, 2016

Recommendations for managing spider mites in corn and soybean, including treatment thresholds, insecticides as well as discussions on the potential impact of beneficial insects, diseases, and insecticide applications.

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Spider mite damage to soybean leaves.
Spider mite damage to soybean leaves.

Identifying Spider Mite Damage and the Species Responsible August 10, 2016

Two species of spider mites, the Banks grass mite and the twospotted spider mite, commonly feed on Nebraska corn. Banks grass mites (BGM) feed almost exclusively on grasses, including corn, small grains, and sorghum. Twospotted spider mites (TSM) not only feed on many species of grasses, but also on soybeans, fruit trees, and a variety of vegetables and ornamental plants.

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Frogeye leaf spot in soybean
Frogeye leaf spot in soybean

Frogeye Leaf Spot Starting to Show Up in Soybean August 3, 2016

While the fungal disease frogeye leafspot (Cercospora sojina) is not common across Nebraska, it is becoming more widespread. Here's how to identify and manage it in soybeans.

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Participants and presenters at the 2015 Nebraska Soybean Management Field Day
Participants and presenters at the 2015 Nebraska Soybean Management Field Day

Soybean Management Field Days Aug. 9-12 July 29, 2016

Management is the key word for the 2016 Soybean Management Field Days which will address some of the big challenges that each farm must manage — water, weeds, fertility, pests and markets. The events will be Aug. 9 near Orchard, Aug. 10 near Chapman, Aug. 11 near Cordova, and Aug. 12 near Schuyler.

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Soybean Aphid
Soybean Aphid

Soybean Aphids Found in Northeast Nebraska; Scouting Warranted July 28, 2016

This week soybean aphids were found in several northeast Nebraska fields at low numbers. Although it has been too hot for soybean aphids to thrive, populations could quickly increase with cooler temperatures. Scouting is recommended at this time.

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Soybean aphid speed scouting app
Soybean aphid speed scouting app

Soybean Aphid Scouting and Management July 28, 2016

The current recommended economic threshold for late vegetative through R5 stage soybeans is 250 aphids per plant with 80% of the plants infested and populations increasing. Depending on economic conditions, this generally gives you about five to seven days to schedule treatment before populations reach economically damaging levels.

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White mold in soybean
White mold in soybean

Sclerotinia Stem Rot (White Mold) in Soybean: What to Look For July 28, 2016

This article explores how to identify Sclerotinia stem rot (white mold) in soybean fields and differentiate it from other diseases which also may be occurring at this time.

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