Identification and Control Methods for the White-backed Planthopper on Rice

Hosts include rice, wild rice, corn, barley, @#@245@#@, sugarcane, sorghum, barnyard grass, and Kentucky bluegrass.

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

Morphological features: The macropterous male is 3.2-3.8mm long, pale yellow, with dark brown spots. The top of the head protrudes forward; on the outer side of the lateral ridges of the pronotum and mesonotum, behind the compound eyes, there is a crescent-shaped dark brown spot; the lateral areas of the mesonotum are dark brown with a yellow longitudinal band in the middle; the forewings are semi-transparent with brownish halo spots at the tips; the wing veins, face, thorax, and ventral surface of the abdomen are dark brown. The macropterous female is 4-4.5mm long, mostly yellowish-white with light brown spots. Eggs are crescent-shaped, 0.7-0.8mm long. Nymphs have 5 instars; the final instar nymph is grayish-white, about 2.9mm long.

Life habits: **, in Ningxia there are 1-2 generations per year, 2-3 generations in the Northeast, 3-4 generations south of the Huai River, 4-7 generations in the Yangtze River basin, 7-10 generations in Lingnan, and in Hainan

southern part 11 generations; it is a migratory pest. The initial source of the insects migrates from the south. The migration period is delayed from south to north, with overlapping generations. The macropterous adults have strong flight ability; each female lays about 85 eggs; when the field population increases about 2-4 times per generation and the field insect density is high, they migrate and transfer.

Control methods: (1) Select insect-resistant varieties such as Gan Zao Xiu No. 42 that are resistant to the white-backed planthopper. (2) For other methods, refer to the brown planthopper.