CaroVail Agronomy Update June 26, 2015

Looking Into Alfalfa

Looking at alfalfa stands sometimes deserves a closer look (Image 1). Recently, CaroVail AG Tech Service team member Kate Vail took a close look at alfalfa in the Hudson Valley. From a distance, things look good and second cutting will have good volume.

But looking closer (Image 2) and using a sweep net, we find the presence of the potato leaf hopper. At this stage of growth, the cutter bar will be the best control method. However, monitoring regrowth needs to be a priority to evaluate whether other treatments are necessary.

Insect damage can often be confused with other underlying conditions (Image 3). Insufficient supply of Potassium (K) and Boron may be masked by the discovery of the leafhopper, incorrectly attributing the symptoms to the leafhopper when nutrient deficiency is the actual cause. Tissue analysis evaluation of soil tests and harvest records will help determine if nutrient needs have been met.

With recent wet conditions, Nitrogen production by the legume may not be as efficient and the addition of Nitrogen (N) may deliver benefits to your crops. Sulfur (S), necessary for protein formation and availability, will also have been lessened with good crop growth and excess rainfall.

A closer look at all crops as they continue to grow gives incite to needs and opportunities to maximize investments and plan for future programs.