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ARS Home » Southeast Area » Tifton, Georgia » Crop Protection and Management Research » Research » Publications at this Location » Publication #110908
Title: WINTER FALLOW MANAGEMENT OF VOLUNTEER PEANUT (ARACHIS HYPOGAEA L.) AND CUTLEAF EVENINGPRIMROSE (OENOTHERA LACINIATA HILL).

Author
item Johnson, Wiley - Carroll
item BALDWIN, J - UNIVERSITY OF GEORGIA
item MULLINIX, JR., B - UNIVERSITY OF GEORGIA

Submitted to: Peanut Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 10/13/2000
Publication Date: 12/1/2000
Citation: Johnson, III, W.C., Baldwin, J.A., and Mullinix, Jr., B.G. 2000. Winter fallow management of volunteer peanut (Arachis hypogaea L.) and cutleaf eveningprimrose (Oenothera laciniata Hill). Peanut Science. 27:67-70.

Interpretive Summary: Volunteer peanut (Arachis hypogaea L.) is the result of excessive harvest losses the preceding growing season. Cutleaf eveningprimrose (Oenothera laciniata Hill) is a winter biennial weed endemic to the southeastern coastal plain. Both species are considered nuisances to rotation crops, with densities of either species rarely great enough to reduce crop yield through competition. However, volunteer peanut and cutleaf eveningprimrose are alternate hosts to tomato spotted wilt virus and there is increasing evidence that these weeds are important components of the epidemiology of spotted wilt in the southeastern coastal plain. Therefore, there is interest in controlling both species during the winter fallow season. Studies were conducted in the coastal plain region of Georgia on the timing and frequency of winter fallow harrowing, integrated with applications of glyphosate or tribenuron-methyl, ,for control of volunteer peanut and cutleaf eveningprimrose. Spring harrowing was generally more effective in controlling volunteer peanut than fall or winter harrowing. Conversely, cutleaf eveningprimrose was controlled by sequential harrowing in the fall, winter, and spring, with single harrowing less effective. In general, spring applications of glyphosate or tribenuron-methyl were equally effective in controlling volunteer peanut and cutleaf eveningprimrose in the absence of tillage. These results give growers in the region cost-effective options for controlling volunteer peanut and cutleaf eveningprimrose.

Technical Abstract: Volunteer peanut (Arachis hypogaea L.) and cutleaf eveningprimrose (Oenothera laciniata Hill) are part of the epidemiology of spotted wilt disease of peanut and other susceptible crops in the southeastern coastal plain. Studies were conducted on the timing and frequency of winter fallow harrowing, integrated with applications of glyphosate or tribenuron-methyl, ,for control of volunteer peanut and cutleaf eveningprimrose. Spring harrowing was generally more effective in controlling volunteer peanut than fall or winter harrowing. Conversely, cutleaf eveningprimrose was controlled by sequential harrowing in the fall, winter, and spring, with single harrowing generally less effective. In general, spring applications of glyphosate or tribenuron-methyl were equally effective in controlling volunteer peanut and cutleaf eveningprimrose in the absence of tillage.