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Volume 33, Issue 03 | June 25, 2020

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Download the pdf: Volume 33, Issue 03 | June 25th, 2020

 

GRASSHOPPER THRESHOLDS

There are reports of grasshopper nymphs in areas around the county. Reporting a small number of fields treated due to heavy infestation, with more reports of low nymph numbers in ditches or along field edges. See weekly NDSU IPM survey map of scouted areas across the state: https://www.ag.ndsu.edu/ndipm/grasshoppers

The action threshold for nymphs is:

  • 50-75 per square yard in field margins
  • 30-45 per square yard within the field

Regular scouting of field edges is important because populations vary year to year. Use a 15-inch sweep net to find small grasshopper nymphs in grassy ditches next to emerging field crops. Action thresholds are based on the number of grasshopper nymphs or adults per square yard. Since it is difficult to estimate the number of grasshoppers per square yard when population densities are high, use four 180-degree sweeps with a 15-inch sweep net to estimate the number of adult (or nymph) grasshoppers per square yard. Early detection of grasshopper nymphs is vital for effective pest        management.

Source: Grasshoppers Emerging (06/2019) Crop and Pest Report

SMALL GRAINS AND HOT TEMPERATURES

Wheat that was jointing during heat last week, may turn out to be a bit of a shorter crop this year. Stem elongation during hot weather tends to shorten the crop more than normal. Drought stress can also be a factor, though many areas have plenty of subsoil moisture. If your wheat crop is looking short, it may not necessarily mean a reduced yield. Small grains have a great ability to adjust to less than ideal growing conditions. 

Keep an eye out for high temps after flowering/during pollination, and hope for cool nights during grain fill, as this will contribute more to your seed set and yield than the heat right now.

Source: Heat Stress on Small Grains (6/24/2020) University of Minnesota Extension

CALENDAR OF EVENTS

VIRTUAL FIELD DAYS FOR NORTH DAKOTA RESEARCH EXTENSION CENTERS (REC’S)

July 13 - Agronomy Seed Farm, Casselton (5 p.m.)

July 14 - Carrington Research Extension Center

July 15 - North Central Research Extension Center, Minot (includes pulse crops and canola field day)

July 16 - Langdon Research Extension Center (9:00 a.m.)

July 28 - Central Grasslands Research Extension Center Streeter (10 a.m.)

Aug. 27 - Carrington Research Extension Center Row Crop Day

Full list of field days from around the state: https://www.ag.ndsu.edu/research/field-days

 

SUBSCRIBE TO THE WEEKLY CROP AND PEST REPORT

Subscribe to the weekly NDSU Crop and Pest report for timely, seasonal articles based on research and tailored to North Dakota.  You can view current and archived Crop and Pest Reports on their website, at https://www.ag.ndsu.edu/cpr/ or visit the Facebook page @ndsuextcpr.  Subscribe to the Crop and Pest report via the website to receive weekly pdf’s via your e-mail.

TIMELY ARTICLES IN THIS WEEK'S CROP AND PEST REPORT

  • Iron Deficiency Chlorosis
  • Evaluating Corn Stands
  • Scouting for Soybean Aphid, and Armyworms
  • Top Dressing/Side-Dressing N Timing—Follow-up article from last week

 

ANR EXCHANGE WEEKLY E-NEWSLETTER

Each week NDSU Extension's agriculture and natural resource  specialists and agents gather the latest crops, livestock, natural resource management, horticulture and ag economics information and send it to your email inbox. Subscribe today.

 

 

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