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ARS Home » Southeast Area » Tifton, Georgia » Crop Protection and Management Research » Research » Publications at this Location » Publication #136044
Title: THE INFLUENCE OF CLASSIC ON TOMATO SPOTTED WILT VIRUS OF PEANUT

Author
item PROSTKO, E - UNIVERSITY OF GEORGIA
item KEMERAIT, R - UNIVERSITY OF GEORGIA
item Johnson, Wiley - Carroll
item BRECKE, B - UNIVERSITY OF FLORIDA
item BROWN, S - UNIVERSITY OF GEORGIA

Submitted to: American Peanut Research and Education Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/14/2002
Publication Date: 12/17/2002
Citation: Prostko, E.P., Kemerait, R.C., Johnson, W.C., Brecke, B.J., Brown, S.N. 2002. The influence of Classic on tomato spotted wilt virus of peanut [abstract]. American Peanut Research and Education Society Abstracts. 34:99.

Interpretive Summary:

Technical Abstract: Chlorimuron is registered for use on peanut for late-season control of Florida beggarweed (Desmodium tortuosum). It can be applied from 60 days after emergence (DAE) until 45 days before harvest. Over the past several years, observations suggest that chlorimuron might have influence on the severity of spotted wilt, caused by tomato spotted wilt tospovirus (TSWV). Field trials were conducted in 2000 and 2001 at four locations in Georgia and one location in Florida. Chlorimuron was applied at 0.009 kg ai/ha at various intervals ranging from 21 to 90 DAE. 'Georgia Green' and 'C-99R' peanut were used at all locations. The plot areas were maintained weed-free and spotted wilt ratings were made just prior to inverting. No herbicide treatment by variety interaction was observed at any location. At the Ty Ty, GA location in 2000, chlorimuron applied at 46, 63, and 80 DAE caused a significant increase in TSWV and reduced peanut yield. At this same location in 2001, only chlorimuron applied at 77 DAE caused a significant increase in spotted wilt incidence. However, yields were significantly reduced when chlorimuron was applied at 26, 33, and 48 DAE. At Attapulgus, GA in 2001, TSWV was increased when chlorimuron was applied at 45 and 90 DAE. Yields at this location were not reduced by any application of chlorimuron. At Sale City, GA in 2001, TSWV was increased when chlorimuron was applied at 58 and 72 DAE. Peanut yields at this location were not collected. At Jay, FL in 2001, spotted wilt incidence was not measured but peanut yields were significantly reduced when chlorimuron was applied at 45 and 75 DAE. Other herbicides evaluated, including imazapic, bentazon, paraquat, sulfentrazone, diclosulam, flumioxazin, and acifluorfen. None of the additional herbicides affected incidence of spotted wilt in peanut.