The tillage method a grower uses can make a big difference in peanut yields. There are many different methods to choose from, each with its own merits and disadvantages for a given situation. Unbiased tillage research is difficult to accomplish, but studies have consistently shown that peanuts grown in strip till systems have less thrips damage and slightly less spotted wilt. On-farm observations have confirmed these results, but more studies are needed to characterize the magnitude of the reduction. We do not suggest that growers should change their tillage method just to reduce spotted wilt, but we have included tillage in the risk index in an attempt to better identify total risks.
Many factors combine to influence the risk of losses to TSWV in a peanut crop.
Some factors are more important than others, but no single factor can be used as a reliable TSWV control measure. Research data and on-farm observations, however, indicate that, when combinations of several factors are considered, an individual field's risk of losses due to TSWV can be estimated. The University of Georgia Tomato Spotted Wilt Risk Index for Peanuts was developed as a tool for evaluation of risk associated with individual peanut production situations. Using preventive measures to reduce risk of TSWV losses is the only way to control the disease. After the crop is planted, there are no known control measures.