ISSUE 6 June 19, 2008
Southwest North Dakota NDAWN locations reported having received various amounts of precipitation over the past two weeks. Past two week totals ranged from 1.24 inches at Beach to 3.07 inches at Hettinger. Producers have reported rainfall amounts greater than and less than those at the NDAWN locations. Wind and rain limited times when herbicide and fungicide applications could be applied, but recently applicators are getting into fields.
All crops are exhibiting a wide range of development in the area as well as within some fields. Germination was very uneven particularly on tilled fields and/or where high disturbance drills were used to put the crop in. Some producers with low disturbance drills had difficulty planting into last year’s heavy residue but many experienced operators adjusted their planting pattern to accommodate for the residue and produced some excellent stands considering how dry it was earlier this year. Winter wheat that avoided severe winter injury has headed out in the area. However, winter wheat that was severely injured is in the boot to various stages of head emergence. Early seeded (late March to early April) spring wheat is in the boot or early stages of head emergence. Many alfalfa fields are in the bud to early bloom (less than 5%) stage and are ready for cutting. Sunflower and corn has benefitted from recent warm conditions. Sunflower seeded May 25 is in the V2 stage of development.
Several positive wheat streak mosaic virus (WSMV) and high plains virus (HPV) samples have been found in southwest North Dakota. The increase in WSMV and HPV samples indicate poor sanitation practices, early planting of winter wheat, and planting in close proximity to active "pools" (such as live field corn last fall) of mites and virus provided the green bridge needed by these pests to cause problems in this year’s crop. These viruses have also spelled over into the spring wheat crop too.
Area Extension Specialist/Cropping Systems
Dickinson Research Extension Center
(701) 483-2348 ext 106
During the past week (June 11 to 17), the region received rain ranging from 1.1 inches at Linton to 3 inches at Fingal, based on NDAWN (North Dakota Agricultural Weather Network). Additional rainfall will be welcome to replenish subsoil moisture. High wind, hail, and/or heavy rain injured crops in localized areas as reported from counties including Barnes, Eddy, Foster, Kidder, McIntosh, Sargent, and Stutsman.
Winter wheat is beginning to flower, and spring wheat and barley are in the jointing stages. Row crop development continues to be slow, especially corn. For example, corn planted on May 1 at Carrington and Oakes is behind about 100 growing degree day units compared to the 5-year average (as of June 17). Warm night temperatures would be useful to make-up the current deficiency in heat units.
Small grain injury due to POST application of herbicides is quite common but is expected to be temporary and not impact grain yield. Row crop POST herbicide application is in progress. Wheat tanspot levels continue to be low based on IPM crop scout reports, and leaf rust has not been found yet. Farmers should continue to monitor for cutworm presence in row crops.
Area Extension Specialist/Cropping Systems
NDSU Carrington Research Extension Center
During the past ten days or so (June 9 – June 17), the region again received much needed rainfall ranging from 1.08 inches in Sidney, MT to 2.24 inches near Bowbells based on NDAWN sites. Cool temperatures during this time have been a benefit to producers as crops continue to grow.
Winter wheat is heading out while many of the small grains are at the 6 leaf stage and above. Reports on stands indicate there are several different stages of that crop within a field because earlier dry conditions. Reports of tan spot and root rot diseases are starting to show up in small grain crops. Field pea leaf stages have been reported up the 7-9 node stage. Root rot diseases are also being reported for field peas. Warm season crops are getting a good start. This warmer weather will improve their conditions. Alfalfa harvest has started in the Yellowstone valley.
Cutworm infestations in small grains and legume crops have continued to be reported throughout the region. Small grain herbicide applications have been going for the past couple of weeks.
Area Extension Specialist
Williston Research Extension Center