Effect of Sorghum-Sudangrass and Velvetbean Cover Crops on Plant-Parasitic Nematodes Associated with Potato Production in Florida

W. T. Crow

Abstract


In a 3-year field study, population densities of Belonolaimus longicaudatus and other plant-parasitic nematodes and crop yields were compared between potato (Solanum tuberosum) cropping systems where either sorghum-sudangrass (Sorghum bicolor × S. arundinaceum) or velvetbean (Mucuna pruriens) was grown as a summer cover crop. Population densities of B. longicaudatus, Paratrichodorus minor, Tylenchorhynchus sp., and Mesocriconema sp. increased on sorghum-sudangrass. Population densities of P. minor and Mesocriconema sp. increased on velvetbean. Sorghum-sudangrass increased population densities of B. longicaudatus and Mesocriconema sp. on a subsequent potato crop compared to velvetbean. Potato yields following velvetbean were not greater than following sorghum-sudangrass despite reductions in population densities of B. longicaudatus.

Keywords


belonolaimus longicaudatus; cover crop; cropping sequence; dolichodorus heterocephalus; hemicycliophora sp.; management; meloidogyne incognita; mesocriconema sp.; modeling; mucuna pruriens; nematode; paratrichodorus minor; population dynamics; potato; root-knot nematode; solanum tuberosum; sorghum bicolor × s. arundinaceum; sorghum-sudangrass; sting nematode; stubby root nematode; tylenchorhynchus sp.; velvetbean

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