LONG-TERM EFFECT OF SOIL SOLARIZATION ON CONTROLLING ROOT-KNOT NEMATODES IN SWEETPOTATO

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  • 1 Dept. Agri. Sci. Tuskege e University, Tuskegee, AL 36088
  • 2 Dept. Agri. Southeast Missouri State University, Cape Girardeau, M0 63701

A three year study involving solar heating of soil (soil solarization) with clear polyethylene mulch demonstrated for two years, control of root-knot nematodes (Meloidogyne incognita). The population of M. incognita was reduced >90% in the 0-30cm depth of solarized soil. The number of eggs per gram root recovered and the root gall index from `Georgia-Jet' sweetpotatoes were reduced (92-98%) by soil solarization. Growth and yield were enhanced in solarized soil. The beneficial effects of solarization was observed in the second year following two additional cropping cycles of collard greens and sweetpotatoes.

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