Scraping bark
Bark seams are a good place for wintering of pests such as persimmon. In December, the rough skin of the persimmon tree can be scraped (cannot scrape the white skin), and then the whitening agent can be applied on the scraping site. When the coating is applied, it should not be lost or dried, and it should not fall off. The proportion of whitening agent is: 10 parts of quicklime, 2 parts of lime sulfur, 1 to 2 parts of salt, 2 parts of clay and 36 to 40 parts of water. Add insecticide. Liquify the lime, filter out the gravel, pour the salt that has been removed, mix with lime sulfur and clay.
Wipe mud
The overwintering base number of the insect pests of the genus Shikita in the grafted rootstock (soft date) trunks is large. Because the soft jujube bark is hard to scrape, it can be applied to the tree trunk with a thin, thick, muddy mud. The old mature larvae are stuffed in the tree and let it suffocate.
Digging oocysts
The grass crickets spend winters in the soil around a 30 cm radius and 15 cm depth around the trunk. The eggs are in white oocysts and each oocyst has 40 to 120 eggs, which are easy to identify. After being taken out, it is burned in a centralized manner, or all the soil in this part is moved to the water and drowned, and then replaced with worm-free soil to fill in the cavity.
Tie cloth
According to the habits of grasshoppers, before the newly hatched larvae are placed on the tree, 20 cm wide plastic cloth is tied around the base of the trunk. Use clay on both the top and bottom of the plastic sheet to prevent pests from drilling down. Then mix with 1 part butter and 1 part of engine oil and apply on plastic cloth. The bugs can stick when they climb over.
Spray pesticide
After the pests came on the tree in February, they were clustered on the buds and shades of the dura. Before the persimmon tree sprouts, it is necessary to spray 75% phoxim emulsion 1000 times, rinsing or spraying, so as to kill pests. Http://Content/e23cb317-4b1b-45a9-a867-f3fc6ef0927d?cType=2
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