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ARS Home » Southeast Area » Tifton, Georgia » Crop Protection and Management Research » Research » Publications at this Location » Publication #91837

Title: ROOT DISEASES AND NEMATODES IN BAHIAGRASS-VEGETABLE ROTATIONS.

Author
item SUMNER, D
item MINTON, N
item BRENNEMAN, T
item Burton, Glenn
item Johnson, Alva

Submitted to: Plant Disease
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 9/30/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary: Root diseases and nematodes are limiting factors in vegetable production in the southeastern United States and many other subtropical and tropical areas of the world. A double-crop of cucumber (C) - snapbean (SB) was grown continuously for 4 years and compared with rotations of 1, 2, or 3 years of bahiagrass (BG): BG-C-SB-C-SB-C-SB, BG-BG-C-SB-C-SB, and BG-BG-BG-C-SB. No nematicides or soil fungicides were applied. Root injury caused by soilborne fungi and root-knot nematodes was less following 2 or 3 years, but not 1 year, of bahiagrass than following continuous vegetables. The beneficial effect of C-SB rotation following bahiagrass lasted only 1 year. Then, root injury from soilborne pathogenic fungi and root-knot nematodes was similar to that in continuous vegetables. Plant populations and yield of vegetables were greater following 3 years of bahiagrass than following 1 year of bahiagrass or continuous vegetables.

Technical Abstract: A double-crop of cucumber (C) - snapbean (SB) was grown continuously for 4 years and compared with rotations of 1, 2, or 3 years of bahiagrass (BG): BG-C-SB-C-SB-C-SB, BG-BG-C-SB-C-SB, and BG-BG-BG-C-SB. No nematicides or soil fungicides were applied. Root injury from Rhizoctonia solani AG-4, Pythium spp., and Meloidogyne incognita was less following 2 or 3 years, but not 1 year, of bahiagrass than following continuous vegetables. The beneficial effect of C-SB rotation following bahiagrass lasted only 1 year. Then, root injury from soilborne pathogenic fungi and root-knot nematodes was similar to that in continuous vegetables. Plant populations and yield of vegetables were greater following 3 years of bahiagrass than following 1 year of bahiagrass or continuous vegetables.