Control of Zaobuqu

Also known as jujube inchworm, Toxoplasma gondii, is the "number one enemy" endangering jujube trees. Larvae harm buds, young leaves, buds, and silk winding, hindering the extension of leaves, serious can eat all the leaves, but also a large number of harm to apples, pears, peaches, potatoes, peppers and other crops. The emergence of jujube buds began in the middle of March. When the jujube buds germinated, the larvae began to hatch and harm the jujube buds. Its main biological characteristics are:

1. Every year, the pupa is concentrated in the topsoil around the root neck of the jujube tree to overwinter.

two。 Adults are dioecious, wingless female moths crawl up trees, mate with winged males and lay eggs under coarse warped bark.

3. The aged larvae have a large food intake and strong drug resistance.

4. The wingless female moth cannot pass through the smooth substance, and the young larvae can pass through the smooth object, but it is easy to be stuck by the adhesive. According to the growth history of Zaobuqu, the five lines of defense set by Professor Li Lianchang can be adopted for prevention and control. The specific methods are: one tie, two piles, three digging, four sprinkling, five painting. The first three lines of defense will be completed from March 15 to 20.

Five lines of defense: one binding, two piles, three digging, four spreading, five painting and other five prevention measures are adopted on the ground around the base of the tree trunk. One binding: tie an 8-10 cm plastic sheet close to the base of the tree trunk from the ground, and the interface is glued with plastic glue or nailed with small shoes, so that the female moth can not climb the tree; the second pile: under the plastic bag, build a conical mound of soil, the surface of the pile should be firm and smooth, and the upper edge should be buried with 1.5 cm plastic sheet to make the plastic sheet more solid and seamless. Third dig: dig small ditches of 10 cm wide and 10 cm deep around the mound. The walls of the trenches are straight and smooth, so that the female moths that cannot climb fall into the trenches. The above three lines of defense are required to be completed before the sting.

The fourth and fifth lines of defense are carried out after the adults are unearthed, that is, after the Spring Equinox adults are unearthed, sprinkle 10% phosphos powder or 2.5% trichlorfon powder or 3% 1605 or 35% methyl thiocarbophos poisonous soil (the medicine-soil ratio is 1:10) on the ditches and soil mounds to kill the female moths in the ditches and on the soil piles Five besmear: a small number of eggs laid under the cracks in the earth and stone begin to hatch and do harm to the tree during the germination period of jujube buds. Before the larvae go up the tree, apply a circle of ointment to kill the larvae at the upper edge of the plastic sheet (10 portions of ointment with butter, 5 parts of engine oil, 1605 of 50% or other contact organophosphorus can be mixed for 40-50 days).

The jujube area that failed to use five lines of defense in time to control jujube buqu can sprout and spread leaves on jujube trees, and most of the larvae are sprayed with pesticides to kill the larvae when they enter the second instar. The commonly used agents are: 1000 times of phoxim, 1000 times of malathion, and 1.5-20000 times of deltamethrin or 20% of deltamethrin for aged larvae.