The almost invisible insect on the jujube tree - the jujube gall mosquito

Jujube gall mosquito, is a diptera, gall mosquitoes.Mainly distributed in jujube producing areas all over the country.The larvae of the 1st ~ 4th generation overwintered from June to August, respectively. The 5th generation appeared in the middle of August. When the new shoots of the date tree stopped growing in early September, the larvae began to go into the soil and overwintered as cocoons.With larva suck jujube or jujube tree bud and young leaf juice, and stimulate mesophyll tissue, make victimized leaf to leaf surface longitudinal roll is tube shape.The affected area changed from green to purple, hard and brittle, and soon turned black and withered. 
Farming operations, clearing trees, tree branches, leaves, fruit, and focus on burning, reduce the overwintering insect source.2 drug control, 10% cypermethrin cream 2000 ~ 3000 times solution or 20% thiamethide 1000 ~ 1500 times solution spraying on the leaf surface.Because the affected leaves were tubular to the leaf surface longitudinal roll, so the selection of the spray agent has better absorption and permeability.It is recommended to add yongtong additive which is not afraid of rain 3000 ~ 5000 times.Not fearing rain can make the effective components of the solution quickly penetrate through the epidermis layer of plants and directly enter the stomata on the surface of plants to reach the body of plants, and greatly improve the medicine effect, so as to achieve the killing effect of jujube gall mosquitoes.