Common diseases and insect pests of plum trees and their control

After the first coring of the plum tree, the new secondary shoot is 20 cm long and the developmental branch is 60-80 cm long. If there are many branches, you can remove some of them; if the branches are not too dense, try to reduce them and control them more. Weeds in the orchard should be removed by mid-July. First, bacterial perforation can be sprayed with fungicides such as carbendazim and carbendazim. When the perforation disease is serious, it will cause tree death, spraying general fungicides does not work, agricultural streptomycin can be sprayed for prevention and control, and if it can not be prevented, animal streptomycin can be sprayed for prevention and control. Second, white star beetles like to eat fruits with wounds, so we should pay special attention to the prevention and control of white star beetles. There are three methods to control the white star beetle: 1. The sunflower trapping method is planted separately with a single plant in the orchard, planting 8 to 10 sunflowers per mu, using the fragrance of sunflowers to attract them, and tapping the sunflower disk with a bag every morning to make the adults fall into the bag and then kill them centrally. 2. The trapping and killing method of fruit vinegar makes use of the characteristic that the white star beetle likes fruit vinegar. The preparation method of fruit vinegar was as follows: 1 part of ground fruit, 1 part of vinegar, 2 parts of sugar and 0.5 part of water. The ground fruit is chopped, mixed with vinegar, sugar and water, boiled into porridge, put into a jar (half a bottle can), then add half a bottle of dichlorvos 500 times liquid to mix well. During the peak period of adult occurrence of Baixing beetle, a bottle was hung every 20 to 30 meters in the orchard, with a height of 1.2 to 1.5 meters above the ground. The bottle should be close to the branches and get rid of the white star beetles and dead insects every morning. 3. In the orchard, according to the standard of hanging 6 to 8 beer bottles per mu, hang the beer bottles at a height of about 1.5 meters above the ground, and catch two or three live white star beetle adults into the beer bottles, which will lead other adults to fly into the bottles. Third, Li small heart borer, Li small heart borer, etc., can use 2.5% enemy killing 3000 times liquid, or 50% phoxim 800x solution + 40% omethoate 800x solution, or 20% fenvalerate 3000 times liquid. Fourth, the occurrence of gum disease is related to the wound, frost injury and the harm of green leafhopper, so the big wound should be reduced as much as possible in pruning, and the large cut should be treated with medicine. Attention should be paid to drug control during the occurrence of Daqing leafhopper. Trees that have suffered from gum disease can be cured by scraping off the glue and applying sulfur suspending agent. Fifth, the key for red spiders to control red spiders is to grasp the control period, and it must be eliminated before wheat harvest. It can be controlled with a mixture of imidacloprid and imidacarine or 1500-2000 times of triclofenac EC.