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North Central ND (08/05/21)

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A dry pattern returned to the region over the last week. No rainfall was registered at any of the area NDAWN stations during the week of July 26th. Bare soil temperature at the NCREC is observed at 82 degrees F.

Grasshoppers continue to be observed, with localized spots of higher populations being noted. In some localized areas, adults are clipping the heads of small grain plants (figure 1). The upper left photo was submitted to Dr. Janet Knodel. It was taken between Sawyer and Raub, ND. Please keep in mind the importance of scouting during this time and reflect on the two different possible thresholds for grasshoppers in adults – border threshold (21-40 per square yard) and an in-field threshold (8-14 per square yard). If thresholds are met, control may be required in some circumstances. Some grasshopper nymphs are still observed in the area. Spider mite calls have begun to come in for horticultural related topics. Currently, no agricultural related spider mite calls have been received; however, drought conditions tend to allow populations to rise with crops, such as soybean, already under stress. Red Seed Sunflower Weevils are also being observed in the region. Please refer to Dr. Knodel’s article on red seed sunflower weevil in last week’s edition of the Crop & Pest report for information on thresholds and control.

Crop harvest of small grains and pulses is increasing in the region but reported crop yields are low compared to the long-term average. Several small grain fields are being harvested for hay and some calls came in related to harvesting drought affected corn as hay or silage. Corn in the field is showing signs of stress and producing two ears per plant. Some canola fields will be ready for swathing later this week; however, the uneven fields would impose complications to decide the best time to start swathing.

 

Figure 1. Wheat head affected by grasshoppers, grasshopper in the wheat head, yellow field peas, sunflower.png

 

TJ Prochaska

Extension Crop Protection Specialist

NDSU North Central Research Extension Center

Leo Bortolon

Extension Cropping Systems Specialist

NDSU North Central Research Extension Center