Study on the Control Effect of the Soil Treatment on the Population of Striped Flea Beetle Plyllotreta striolata (F.)

By the soil treatment with tobacco in vegetable field, the larva number of striped flea beetle Plyllotreta striolata (F.) decreased remarkably. The deterrent effect on the adults was 79 81%. The index of population trend (I-value) reduced to 1 882. The interfenence index of population control (IIPC) was 0 124 3, and its protective effect on seeding and yield of vegetable were 86 91% and 77 13% respectively. The control mechanism of tobacco on the population of striped flea beetle was its deterrent effect significantly.