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ISSUE 9   June 28, 2001


Northeast ND

Rainfall was generally Ĺ inch or less in the area last week. The effects of previous above normal rainfall is now evident with yellow crop and thousands of acres of drowned out crop. Recent warm weather is helping crops and normal color is returning. Weed control in all crops is behind schedule with advancing crop growth stages restricting herbicide choices. Leaf disease in small grains is not serious yet but wet conditions in the future will allow disease infections to progress rapidly. Powdery mildew is showing up in the lower canopy of barley. Insect problems are scattered with reports of flea beetle, cutworm and sunflower beetle damage still occurring. Female wheat midge emergence should be common by the end of the week but widespread problems are not anticipated. The earliest planted canola fields are beginning to bloom and there is widespread concern about the development of white mold as saturated soils have set the stage for a potential problem with this disease in canola. Row crops have good stands and are starting to grow well with warmer weather.

Terry Gregoire
Area Extension Specialist/Cropping Systems


South-Central ND

During the past week (June 20 to 26), rainfall recorded at NDAWN sites in south-central North Dakota ranged from no rain (Edgeley) to 0.56 inches (Robinson). Dry weather for at least a couple of weeks would be welcome in the region. Cool-season crop stands generally are excellent. Early-planted barley and wheat are near or at the heading stage. Most of the regionís canola is flowering. Recent warm air temperatures combined with abundant moisture have accelerated growth of all crops including corn, beans, and sunflower.

Tan spot is present in most wheat fields. Also, Septoria leaf blotch and leaf rust (one field in Emmons County) have been detected on June 25-26 by Jerry Schneider, NDSU Extension Service IPM crop scout. According to the NDSU small grain disease forecasting model, conditions favorable for tan spot infection were present 11 of 12 days during June 15-26 at Carrington. Conditions for leaf rust and Septoria blotch were present 4 of 12 days during the same period at Carrington. Forecasting models can be viewed at the following website: http://www.ag.ndsu.nodak.edu/cropdisease/cropdisease.htm

Net blotch is common in area barley fields while barley yellow dwarf virus is currently scarce. Fungicide application for control of leafspot diseases and scab in wheat and barley, and control of white mold in canola are strategies many growers are using or at least considering. The ND sclerotinia risk forecast map indicates south-central ND canola is at moderate to high risk of sclerotinia infection. Downy mildew levels appear low in sunflower. Wheat growers also should be aware that the orange wheat blossom midge should soon be emerging. Favorable weather conditions are needed to continue POST herbicide application in warm-season crops.

Gregory Endres
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center

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