Plant Pathology Update – Tomato Spotted Wilt Virus

Dr. Albert Culbreath is a research plant pathologist and professor at the University of Georgia Tifton Campus. His work focuses primarily on leaf spot diseases and tomato spotted wilt virus. Culbreath said he has seen more tomato spotted wilt virus during the 2016 growing season than he has in previous years. One thing he is looking into is field resistance with new varieties coming out of the breeding program at UGA, as well as incorporation of thrips management and planting dates. When offering suggestions for growers battling tomato spotted wilt virus, Culbreath suggests planting later in the season and planting in a twin-row pattern to decrease the odds of feeling the effects of the virus. Also, he mentioned plant population and how making sure you have a good, evenly-emerged population (regardless of variety) will help. When looking at varieties, Georgia 06G has an excellent level of resistance to tomato spotted wilt; however, it is not completely resistance and can be overwhelmed. Georgia 12Y is the next best option for someone who has a heavy presence of tomato spotted wilt.  Georgia 13M does not have quite the resistance that Georgia 12Y does, but it seems to have more than Georgia 06G. Overall, if the optimum planting date is selected, the best resistance insecticide option is chosen and seeding rate is taken into consideration, the chance of keeping tomato spotted wilt out of fields is higher.

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