Evaluation of the Protective and Therapeutic Properties of DBCP for Control of Root-Knot Nematode on Tomato
Abstract
Twelve soil drenches over a period of 30 days with DBCP concentrations of 40 [mu]g/ml did not completely prevent infection of tomato plants by root-knot nematode juveniles. Repeated DBCP drenches of 40 [mu]g/ml halted gall development during the drenches, but 10 days after drenching was discontinued galls were apparent. DBCP drenches at 200 [mu]g/ml prevented tomato root development, and 40 [mu]g/ml slowed it. Ten [mu]g/ml increased the height of root-knot-infected plants, but not their top weights. Treated plants were lanky. Protective drenches of 2.5 to 40 [mu]g/ml of DBCP decreased nematode populations and increased fruitfulness. DBCP as a therapeutant reduced the incidence of galling on new roots and halted increases in gall size on previously infected roots but did not improve fruitfulness or plant size significantly.Downloads
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