Pesticide application season is in full swing. Breezy and windy conditions are always a challenge for pesticide applicators in South Dakota, however, temperature inversions are just as important of a challenge.
Several plant parasitic nematodes infect corn leading to reduced plant vigor, stunted growth and yield loss. Plant parasitic nematodes are microscopic worm-like organisms that live in the soil.
May 2018 was a 180-degree turn from April. South Dakota had its second coldest April on record, to something close to the tenth warmest May on record. As we are in early June, it appears as if the heat will continue.
The blizzard of April 2018 was one of the most powerful low pressure systems in history for that month. Ironically, it started on Friday the 13th and didn’t wrap up until Sunday.
With hot temperatures occurring this past week, a lot of degree days have accumulated. However, common stalk borer activity likely remains limited to grass and weeds bordering fields.
Many southern area farmers are facing excess moisture again this spring, and some are considering changing varieties to accommodate for a later planting date. The Corn Growing Degree Day (GDD) Tool can help decide if a shorter day variety may be needed.
Throughout South Dakota, corn is beginning to emerge. In its early vegetative growth stages, corn is susceptible to feeding by the common stalk borer. For the most part, common stalk borer is considered to be only a minor or occasional pest.
Due to the late planting season in 2018, growers are becoming more and more worried about potential yield losses due to planting delays. Yield reductions may become significant after about May 20, especially for full season corn hybrids, and the risk of increased drying costs and crop losses due to an early fall frost also become a concern.
Given the relatively late arrival of spring in South Dakota, many farmers are planting corn as soon as they are able to get in the field in an attempt to capture as many growing degree days (GGDs) as possible.
The 2018 winter was cold—very cold. Throughout most of South Dakota, low temperatures were at or below 14F for 60-80 days with many areas experiencing 2-3 weeks with subzero temperatures.