| Abstract: In order to study the control effects of 10% fosthiazate, 0.5% avermectin and 1% emamectin benzoate on root-knot nematode disease of tomato, 'Hefen No.2' was used as experimental material and pot experiment was conducted. The results showed that, among the three pesticides, the decline rate of soil pest population was the highest for 10% fosthiazate on the 35th and 70th days after treatment whose insect population control effect reached 88.25% and 88.54% respectively, followed by 0.5% avermectin whose insect population control effect of those reached 83.94% and 82.75% respectively. 10% fosthiazate had the highest average height, the largest average stem diameter and the largest average single fruit weight, which were 102.21 cm, 8.81 mm and 125.5 g respectively. 1% emamectin benzoate treatment with above three indicators were the lowest. 10% fosthiazate had the lowest root-knot index (17.63) and the best rootknot control effect (71.34%), followed by 0.5% avermectin (58.63%) with significant difference from 10% fosthiazate. The root-knot index of tomato was significantly decreased and the decline rate of soil pest population was significantly increased. The plant height, stem diameter and fruit weight of tomato were increased, and the difference between them and CK (no pesticide) was significant. The order of insect population and root-knot control effect from high to low was 10% fosthiazate, 0.5% avermectin, 1% emamectin benzoate. In general, 10% fosthiazate was the best fosthiazate. |