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2018 Field Plot Summaries for Corn: Fungicide Trials
This document contains results of corn field trials conducted during the 2018 growing season to evaluate foliar fungicides to manage various corn diseases.
Fungicide Resistance: Risk and Management
What is fungicide resistance?
Fungicide resistance can be defined as when a pathogen population is no longer sensitive or has reduced sensitivity to the fungicide that used to control the same pathogen.
Bacterial Leaf Streak of Corn: A New Corn Disease in South Dakota
Bacterial leaf streak, caused by Xanthomonas vasicola pv. vasculorum (Xvv), is a recently discovered disease of corn in South Dakota. The disease was first identified in Nebraska in 2016 but now has been found in the majority of the Corn Belt states. Under favorable weather conditions bacterial leaf streak can develop to reach yield reducing levels. Like any other bacterial disease, once symptoms develop there is little that can be done to control it in the field. However, it is important to correctly diagnose this as a bacterial disease because it can be confused with gray leaf spot which is a fungal disease.
Wheat Diseases Identification Pocket Guide
Accurate plant disease identification is the first step in designing effective and sustainable disease management programs. The purpose of this guide is to provide information on how to recognize wheat diseases and also to provide possible management options.
Tan Spot of Wheat
Tan spot is a devastating disease of wheat in South Dakota and the rest of the wheat producing regions world over. It causes an estimated yield loss of about 5 percent in South Dakota but this loss can go up to 30 percent in individual fields.
Growing Sweet Corn in South Dakota
Sweet corn is a delicious vegetable enjoyed by both kids and adults. It is popular in the mid-to-late summer and is often bought at stands on street corners and grocery stores throughout small towns in South Dakota. What many people don’t know, however, is that sweet corn is a remarkably easy vegetable to grow yourself. All you need are a few essential materials and some basic knowledge to grow your own delicious sweet corn.
Plant Disease Management Decisions to Make Before Planting
For most plant diseases, in-season management choices are very limited. In fact, there are no in-season management options available for diseases caused by nematodes, viruses, and bacteria.
Soybean Vein Necrosis Virus Detected in South Dakota Soybeans
A new soybean virus called Soybean vein necrosis virus (SVNV) was detected in South Dakota soybean fields in Davison and Union counties. Symptomatic plants were sporadic and found along the field borders. Infected plants showed mild to moderate severity.
Seeing Dead Soybean Plants in a Circular Pattern? Could Be Due to Lightning
While quite uncommon for lightning to damage row crops, it does happen. Thunderstorms can have lightning that can burn soybeans plants leading to their death.
White Mold Development: Is your soybean field at risk?
According to USDA-NASS crop progress report for the week of July 17, 49% of the soybeans in South Dakota are at flowering. The flowering growth stage is also the time when white mold infection is initiated. The white mold pathogen infects the soybeans through the flowers that are senescing after pollination.