Tomato Spotted Wilt virus (TSWV), a very serious disease of peanuts in 2001 and 2002 in the eastern North Carolina peanut growing region, is vectored by several species of thrips. Because this disease cannot be effectively managed by controlling the thrips, we evaluated methods to reduce the incidence of the virus in the Virginia-Carolina growing region. We evaluated cultural practices including plant populations, varieties of peanut, twin and single-row plantings, planting dates, and in-furrow insecticides. From June through September, symptomatic plants were flagged at ten locations to monitor disease incidence. Incidence of the virus in plants from four locations was later confirmed by AgDia's ImmunoStrip Test Kit (Elkhart, IN). Results indicate that peanuts planted in twin rows had a lower incidence of virus compared to single rows, NC V-11 and Gregory varieties showed less virus than Perry, and plants treated with phorate in-furrow had a lower incidence of virus than those treated with aldicarb in-furrow.
Keywords: cultural control, tomato spotted wilt virus
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