Rice white-backed planthopper

Host rice, Yingbai, corn, barley, @ # @ 245 grass, sugarcane, sorghum, barnyard grass, Kentucky bluegrass, etc.

The damage characteristics are the same as those of brown planthopper.

Morphological characteristics the long-winged male is 3. 2-3.8mm long, light yellow with black and brown spots. Protrusion of the top of the head, forechest, middle chest dorsal plate lateral ridge external compound eye with 1 crescent dark brown spot, middle chest dorsal plate side area dark brown, middle yellow longitudinal band, front wing translucent, end brown halo spot; wing disease, face, chest, abdomen ventral dark brown. The long-winged female is 4-4.5mm long, yellowish-white and with light brown spots. The egg is crescent-shaped, 0.7-0.8mm long. The nymph is 5 years old, and the last instar nymph is gray-white and about 2.9mm.

Living habits * *, 1 Mel 2 generations in Ningxia, 3 MUE generations in Northeast China, 4 MUE generations in the south of Huaihe River, 7 generations in Yangtze River Basin, 10 generations in Lingnan, Hainan

11 generations in the south, belonging to migratory pests. At first, the source of the worm migrated from the south. The migration period has been postponed from south to north, and there is an overlap of generations. The long-winged adult has strong flying ability, about 85 eggs per female, and migrates when the population of each generation in the field increases by 4 times and the population density in the field is high.

Control methods (1) Ganzaogao 42 and other insect-resistant varieties resistant to white-backed planthopper were selected. (2) other methods see brown planthopper.