Pest control of fast-growing poplar

The bud pests of fast-growing poplar are mainly Mongolian weevil, big gray weevil, black velvet chafer, poplar scorpion moth, yang scorpion, white moth, etc., mainly for new planting seedlings.

The control method is as follows: in the germination stage of the seedling, 50% phoxim emulsion, lesburn, chlorpyrifos and other insecticides 1500 times liquid sprayed to kill the adult worm, or use the phorate mixed with poisonous soil to scatter around the seedling root To repel pests.

The main pests of the cockroach are Yang Ganxiang, Populus euphratica, Qingyang Tianniu and A. glabrata. Populus euphratica mainly affects 2 and 3 year old saplings. The control method is: middle and late April, brushing with 1% to 2% solution such as 40% dimethoate, 50% chlorpyrifos, 50% phoxim emulsion, etc. The brush height is about 2 cm. The white-winged moth is mainly caused by 1, 2 years old saplings. During the period from late June to early August, it is sprayed with 1500 to 2000 times of 40% dimethoate, 50% chlorpyrifos, 50% phoxim emulsion. 5 times, each time around 15 days, focus on the spray and the main shoot. Or use an aluminum phosphide tablet to block the wormhole and kill the dry larvae. Qingyang Tianniu mainly damages large trees of 4 years old or older. In the middle and late May, it sprays 80% trichlorfon, 50% dichlorvos, 40% dimethoate 1000 to 1500 times liquid to the branches 1 to 2 times. The A. glabrata is mainly harmful to trees of 5 or 6 years old. It can be controlled in the middle and late April. Drill holes in the dry foundation and reach the core. Each plant is injected with 3 to 5 ml of insecticide, and then the hole is sealed with mud.

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Unsaturated Polyester Resin

Unsaturated polyester resin


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