Lagerstroemia speciosa also known as Lagerstroemia spinosus, is Homoptera, Acridoidea, Polygonaceae. Distribution of China's Beijing, Shanghai, Jiangsu, Zhejiang, Taiwan and other places. The host has not reported anything but Ziwei.
The hazards of crape myrtle occur year after year, often covering the opposite side of the young leaves, distorting the new shoots, curling the young leaves, uneven, affecting the formation of flower buds, and shortening the inflorescence, even without flowers, but also induce coal pollution , spread virus disease.
Morphological characteristics
The winged, female, female body has a yellow body with black markings and a wide triangular body measuring 2.1 mm long and 1.1 mm wide. The abdomen was light yellow, with 1 pair of raised black nodules in each section, of which the 1st pair in the second quarter was the largest and the base was connected. The back of the body has markings, and the tip of the antennae and the whip are black. The wingless females were yellow-green and had a body length of 1.5 mm. They were round in shape and had black spots on the cloth and orange-yellow belly.
The winged females are similar to the wingless females. The body is slightly longer, with dark brown markings on the back, and a black horizontal patch on the second section of the abdomen.
Life history and habits Lagerstroemia species in the region of Jiangsu, Zhejiang, and Shanghai can occur in more than 10 generations a year, and the eggs use buds, buds, branches, etc. to overwinter. In the late spring, when the young shoots of Lagerstroemia crassipes sprouted, the wingless oysters occurred and the larvae did not rise until June. As the temperature increased, winged owls continued to grow, and winged pelicans migrated again.
Control methods
1, horticultural control Pruning the germination branch and cleaning the limbs at the cracked cortex, clear burning, in order to reduce the wintering eggs.
2, chemical control can be sprayed with 50% of the saccharomycetes EC or 40% omethoate EC 1000-1500 times solution, and double pests and other insect pests.
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