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Crop Management

All Crop Management Content

Canola leaves with small, irregular wholes present.

Flea Beetles Still Feeding in Canola

Flea beetle adults are still causing trouble in canola this week. In one field we scouted, populations were very large and were causing large amounts of defoliation on emerging late-planted canola. It is important to continue monitoring fields to ensure that populations have been successfully managed and defoliation isn’t occurring.

healthy rangeland with a diverse variety of grasses and plants throughout

SDSU Extension Hosts 2019 Forage Field Day in Beresford August 7

August 09, 2019

August 7, 2019 SDSU Extension will host a Forage Field Day for livestock producers, agronomists and industry clientele interested in producing and storing high quality forages.

Forage, Crop Management, Beef Cattle, Dairy Cattle, Corn, Wheat, Field Pea, Flax, Oats, Oilseed, Pulse Crops, Sorghum, Soybean, Sunflower

Color-coded map of the United States indicating predicted precipitation for July 2019. South Dakota is set to experience above normal precipitation.

July 2019 Climate Outlook: Challenges Continue

This year’s seasonal pattern of wetter than average conditions is projected to continue through July and the rest of the summer season. The latest climate outlook, released June 20, 2019, shows an increased chance of wetter than average conditions in the next one to three months for the state of South Dakota.

Symptoms of rust infection on wheat blades. Left: Stripe rust. Yellow pustules are arranged in a linear fashion on the wheat blade. Right: Leaf rust. Orange-brown pustules are randomly distributed on the leaf.

Stripe Rust and Leaf Rust Developing in Winter Wheat

Stripe rust and leaf rust were found in winter wheat plots at the SDSU research farm in Aurora. Observation of these two rusts indicates that we have inoculum in our area, therefore winter wheat fields should be scouted until wheat is done flowering.

Two, dark green aphids on a bright green leaf.

Aphid Populations Being Observed in Wheat

During the past couple of weeks, reports of aphid populations in wheat fields have slowly been increasing. Typically, the initial aphid populations are observed earlier in the season, but the 2019 spring may have delayed infestations.

Green soybean plant with holes on the leaves (indicated by red arrows) caused by bean leaf beetle feeding.

Scout Soybeans for Bean Leaf Beetle Feeding

We are receiving numerous reports and also observing very large bean leaf beetle populations this year. As a result, there is also a lot of concern about soybean defoliation due to the emergence and subsequent feeding by the overwintering adult population.

Small black and yellow beetle feeding on the green leaf of a canola plant.

Flea Beetles Defoliating Canola in South Dakota

This year flea beetle emergence is behind schedule, but so is a lot of the canola emergence. We are observing very large flea beetle populations on late-planted canola that is just emerging. As a result, much of this canola is being heavily defoliated and will likely require foliar insecticide management.

United States Environmental Protection Agency logo.

Cancellation of Several Neonicotinoids

On May 20, 2019, the United States Environmental Protection Agency announced the cancellation of registrations for 12 products that contain neonicotinoid insecticides. The cancellation of the product registrations was voluntarily requested by the companies that had registered the products.

A green pea leaf with white, powdery spots throughout.

Powdery Mildew: A Disease Concern in Field Peas

Producers of field peas may need to scout for powdery mildew this year. Powdery mildew is a late-season fungal disease that can impact peas if weather conditions are conducive. However, this disease can also occur in early planted fields in South Dakota under the right environmental conditions and when the crop canopy is heavy.