Abstract
The bodies of M. incognita larvae became shorter with irregularly waving postures after being immersed in 10, 100 and 1, 000ppm solution of aldoxycarb; most intense effect was induced by aldoxycarb at a concentration of 100ppm. Except for those treated with aldoxycarb at a concentration of 1, 000ppm for 5 days, the larvae resumed their motility after being rinsed with distilled water. Numbers and sites of galls induced by these nematodes were investigated on tomato plants which were provided with water and fertilizer through percolation from the bottom of the container. Almost half of the larvae without treatment formed galls on roots extending up to 7.2cm below the surface level. Nematodes rinsed with distilled water before inoculation produced a smaller number of galls on the upper parts of the roots with the increase in the dose of aldoxycarb. When nematodes were inoculated without being rinsed, those suspended in a solution of aldoxycarb (lOppm conc.) produced a few galls within a distance of 1.4cm below the surface level, while the nematodes in solutions with a concentration of 100 and 1, 000ppm did not induce the formation of galls.
