Crop & Pest Report
Early planted potatoes fields that have had preemergence acetamide herbicides (active ingredient of Dual and Outlook) applied prior to the cool and rainy conditions began a couple of weeks ago could potentially be damaged by the preemergence herbicide.
Question: Does Sharpen provide residual control? Short answer: Don’t depend on it exclusively unless you’re applying the corn rate (and even in corn you probably won’t always rely on it exclusively).
Question: I was reading pages 30 and 31 of ND Weed Control Guide and see there are combinations of burndown that include Verdict/Sharpen then followed later by PRE's that use Spartan containing products.
Some may have applied an acetamide herbicide (active ingredients of IntRRo, Dual, Surpass, Harness) prior to the beginning of this wet cycle. Most of these herbicides have safeners included in the formulation to provide high corn tolerance. Under good growing conditions of moist and warm soils corn emergence is rapid and the emerging corn seedling can metabolize the herbicide quickly.
Last week the following was printed about PRE herbicides for kochia: “Many PRE herbicides provide residual control of kochia, including Sharpen, Zidua, Valor (short residual), metribuzin, and Spartan/Authority products.
The dust/mud of planting season is just about over. Due to the astonishing amount of water (can we really call it rain?) that has fallen in many parts of the state, losses of N may have been high due to leaching in the west and denitrification in the east.
Many growers who planted potatoes a few weeks ago have yet to see potatoes emerging because of the cool soil temperatures. Not only does the weather slow down growth, but it favors bacterial seed decay and Rhizoctonia stem canker of the emerging sprouts.
Wet and cool weather is going to favor root rot development in the crops that are planted. Unfortunately, when the seed is in the ground there is nothing we can do to manage root rot development.
We often look to states to our south for cereal rust development and barley yellow dwarf virus (BYDV), as these diseases indicate a possible potential for us in the northern plains states.
Tan spot is beginning to be found in several areas of the state. Growing degree accumulations across the state indicate that wheat fields planted from May 1 to May 10 are in the 3 to 5 leaf stage now.
After a long cold winter and a slow snow melt that delayed corn planting in the state by at least two weeks, we are now dealing with below average temperatures coupled with lots of rain. This cooler than normal weather is beneficial for small grain development, particularly for those crops that have emerged and are beginning to tiller.
Soybeans are germinating slowly this year with the cool and wet growing conditions the second half of May. Early planted soybean seed may have been sitting in the damp, cool soil for a long time.
The first detections of sugarbeet root maggot (SBRM) flies by NDSU personnel occurred last week near Thompson and Reynolds, ND in the central portion of the Red River Valley (RRV).
Japanese beetle adults were found at several locations in North Dakota in 2012, including Fargo, West Fargo, Grand Forks, Bismarck, Minot, Oakes, Taylor and rural Foster County.
The brightly colored red velvet mites have been observed crawling around on the soil of fields. These mites belong to the mite family Trombidiidae.
Cool, wet weather is not favorable for grasshoppers and causes increased disease and mortality. Grasshopper hatch is usually underway by now, but the cool temperatures have delayed hatching. If you see the common lilac beginning to bloom, this is an indicator of when grasshopper emergence should be starting.
Cereal aphids have been detected in fields from Fergus Falls to Morris and in southwest Minnesota at low densities of 3-5 aphids per plant and <35% incidence (Sources: B. Potter, D. Holen and P. Glogoza, UMN).
Agriculture Commissioner Doug Goehring encourages farmers, ranchers, pesticide dealers and applicators, government agencies and homeowners to bring their unusable pesticides to any of the 12 Project Safe Send collections in July.
Maps detailing corn accumulated daily growing days, percent normal rainfall, departure from normal average air temperature, and accumulated wheat growing degree days.
Information from the Southwest region of North Dakota.