Plant Disease (2001) 85, 767-772

P. Timper, N.A. Minton, A.W. Johnson, T.B. Brenneman, A.K. Culbreath, G.W. Burton, S.H. Baker and G.J. Gascho (2001)
Influence of cropping systems on stem rot (Sclerotium rolfsii), Meloidogyne arenaria, and the nematode antagonist Pasteuria penetrans in peanut
Plant Disease 85 (7), 767-772
Abstract: The effect of crop rotation (main plots) and pesticide treatment (subplots) on stem rot (Sclerotium rolfsii), Meloidogyne arenaria, and the nematode antagonist Pasteuria penetrans was determined in a field experiment. The field site was naturally infested with all three organisms. Peanut (P) was rotated with 2 years of either cotton (Ct), corn (C), or bahiagrass (B). The pesticide treatments for the peanut crop were aldicarb (31 g a.i. per 100-m row), flutolanil (1.7 kg a.i./ha), aldicarb + flutolanil, and a control without either pesticide. Populations of M. arenaria were lower in peanut in the Ct-Ct-P than in P-P-P, C-C-P, or B-B-P plots and tended to be lower in plots treated with aldicarb. Abundance of P. penetrans endospores was highest in the P-P-P plots, intermediate in the B-B-P rotations, lowest in all other rotations, and was unaffected by aldicarb. The high endospore densities in the P-P-P plots may have contributed to the uncharacteristically low nematode populations in the monoculture. Incidence of stem rot in peanut was lowest in treatments with flutolanil, intermediate in the control, and highest in treatments with aldicarb alone. The greater canopy cover in aldicarb-treated plots may have created a conducive environment for S. rolfsii infection.
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Database assignments for author(s): Albert K. Culbreath

Research topic(s) for pests/diseases/weeds:
environment - cropping system/rotation
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides
environment/habitat manipulation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Athelia rolfsii	Groundnut/peanut (Arachis hypogaea)	U.S.A. (SE)
	Meloidogyne arenaria	Groundnut/peanut (Arachis hypogaea)	U.S.A. (SE)
Pasteuria penetrans (antagonist)	Meloidogyne arenaria	Groundnut/peanut (Arachis hypogaea)	U.S.A. (SE)