Yang Xiao Zhou moth, also known as Yang brown day club moth, small moth, is Lepidoptera moth family. The larvae feed on the leaves of poplars and willows. When the damage is severe, they can cause all the leaves of the entire forest to be eaten. Yang Xiaoxing moths occur in Jiangsu for 3-4 generations each year. The wintering of the beak and adult emergence in April of the following year are followed by mating. The first-generation larvae began to appear in mid-May; the second-generation larvae took place from mid-June to early July; the third-generation larvae took place from late July to early August; the fourth-generation larvae took place in the mid-to-late months of September; Wintering. Adults hide on the back of the leaves or under the cover during the day and copulate and spawn at night. The eggs are prolific in the leaves and they are massive, with 100-400 eggs per piece. Each female can lay about 500 eggs. The newly hatched larvae clustered on the leaf surface to feed on the epidermis, making the leaves look like a reticular. When the larva is slightly larger, the entire leaf is scattered and only leaf vein petioles are left. After the larvae matured, they spit silk and defoliate them. The last generation of mature larvae mostly climbed into the gaps between the bark, dead leaves, withered grasses, or under the surface soil. Its natural enemy larva stage has moths and bees, egg period has parasitized Trichogramma.
Control methods: (1) Manually remove larvae that feed on the leaves. (2) Spray with Bt emulsion at a concentration of 1:10 to poison the larvae. (3) spraying 80% of the enemy's milk emulsion 1000-1500 times, 10% broad-spectrum enemy killing emulsion 2500 times to kill the larvae, but also can be used Zhuyou urea No. 1 3000 times spraying the tree cap to kill the larvae.
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