Tomato Spotted Wilt Virus: TSWV of Peanut: Risk Index
TSWV of Peanut
TSWV Risk Assessment Index Exercises
The following are "Real World" situations that Peanut Farmers in the Southeastern U.S. face every spring. (The names have been changed to protect the innocent.) Using the Spotted Wilt Risk Assessment Index, can you help them make their decisions and combat spotted wilt?
Farmer White is planning to plant Georgia Green cultivar peanuts during the second week of May. She plans on planting enough high-quality seed to get 5 plants per foot of row. She is hoping to use both twin row patterns and strip tillage systems. In the past she has used phorate insecticide to suppress spotted wilt. If she uses phorate insecticide, however, she'll have to go back to using planters for standard single row patterns, and use conventional tillage. Based on the spotted wilt index totals, with which planting regime would she be better off.top
Farmer Meade planted all of his Georgia Green cultivar peanuts between April 22 and April 28 and got a good stand of 4.5 plants per foot of row. He planted all of his FL MDR-98 cultivar peanuts between May 5 and May 12, but alas, he got poor stands of only about 1.5 plants per foot of row. All other factors are the same for the two plantings. No at-plant insecticide was used in either cultivar, both are planted in single row patterns, and with conventional. In which planting should he be most at risk for losses to spotted wilt?
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Farmer Rodriguez plans to plant Georgia Green cultivar during May 5 - 15. He has high quality seed, and expects to get a stand of at least 4 plants per foot of row. He is set up such that he can use twin row patterns, but can use only conventional tillage. He has a history of moderate losses to spotted wilt. He has a problem with nematodes, which means he must use a nematicide, and cannot use phorate to help suppress spotted wilt. His question is can he refrain from using phorate and still get into the "Low Risk" category for spotted wilt?
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Farmers Jack and June Bailey have an attractive contract offer to plant SunOleic 97R peanut cultivar. This cultivar has excellent oil chemistry that makes it highly desirable for the candy industry, as well as for the health benefits to people who consume it. However, for them to get the contract, they must harvest the peanuts in early August, which means they must plant them by April 19. They expect to get a good stand of near 5 plants per foot of row. Can they accept this contract and still get into the "Low Risk" category for spotted wilt?
Good Luck!