Scientific name Stilpnotia salicis (Linnaeus) Synonyms Leucoma candida Staudinger Lepidoptera. Alias ​​snow tussock moth. Distribution from the north of Heilongjiang, Inner Mongolia, Xinjiang, south to Zhejiang, Jiangxi, Hunan, Guizhou, Yunnan, the density of the northern Huaihe River.
Host cotton, tea tree, poplar, willow, eucalyptus, chestnut, cherry, pear, plum, apricot, peach and so on.
When damage occurs, cotton and tea leaves are damaged. The young larvae only eat the leaves and leave the epidermis. When they grow up, they bite the leaves into nicks or holes.
Morphological characteristics Adult body length of about 20mm, wingspan 40-50mm, all white, with a silky luster, the foot of the knot and attached to the knot with black and white ring pattern. Eggs are head-shaped, gray-white, clumped and covered with foamy white gum. The instar larvae have a body length of about 50 mm and a grayish-yellow back mixed with yellow; the top line is brown, with dark brown on both sides, and the body sections are knob-like, with clusters of yellow-white hairs. The dragonfly is 20mm long, dark brown, with pale yellow fine hair.
Life habits were born in 1 generation in Northeast China and 2 generations in North China. The 2nd instar larvae were used to make thin pupa over the winter in the bark. In the middle of April of the following year, Yang and Liu began to move in the leaf stage. In mid-May, the larvae were about 10 mm in length. During the day, they climbed into tree holes or crevices under buildings and hidden under various objects under the trees. Trees were damaged at night. In mid-June, the larvae matured and larvae matured. At the end of June, the adults emerged. Some eggs were laid on the branches. The first generation larvae invaded the cotton tussock moth and began to hatch in early July. In the end of September, the second-generation larvae survived the winter. The first and second generation eggs are about 10 days old, the first generation larvae are 35 days, the second generation is 240 days, and the winter is the first day of the 8 days, and the first generation is 10 days.
Prevention methods (1) Combine prevention and control of other pests. (2) If necessary, spray 5% linacin or 20% cypermethrin 3,000 times.
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