The current apple trees have entered the flowering period. After the flowering period, as the temperature rises rapidly, leaf-feeding pests, branch pests, and fruit pests all enter the stage of rapid development, and the population of various pests will increase rapidly. About 10 days after flowering, it is the second critical period for the prevention and control of apple tree pests. Fruit farmers should pay close attention to the occurrence of major pests. Once the number of populations reaches the prevention and control targets, prevention and control measures must be taken in time. During this period (mid-April to early May), the damages of leaves, young shoots, young fruit and branches were mainly examined. Focus on red spiders, leaf roller moths, apple astragalus, apple cotton aphid, green aphid, cotton bollworm, and longhorned cattle. Look for spider mites on the inner leaf, whether there are aphids on shoots, and whether the tips of young shoots are green blind. For fleas, check for tender bollworm larvae on young leaves and young fruit. For seedlings and saplings, the focus was on the presence of leaf roller moth larvae on the tops of the shoots and on the leaves of the shoots. Whether there were white flocs (wounded by apple aphids) at the branches of the branches and at the saw cuts. Fresh sawdust-like feces. When the amount of insects is large, according to the type of insect pests, the symptomatic agent is sprayed and controlled. It is worth noting that young fruit is sensitive to pharmacological agents and is prone to phytotoxicity. Spraying of emulsifiable concentrates and poor quality pesticides should be avoided during this period. Specific prevention indicators and measures are as follows: When the number of red spiders reaches 2 per leaf, they can be sprayed with acaricides such as oxazole or spirooxamate to prevent and control them; when the shoot tip rate exceeds 60%, imidacloprid and fluocin can be sprayed. Aminonitril, beta-cypermethrin, spirotetramat or insecticides such as sulfobenzamide are used to control aphid pests, such as green-nosed locusts, apple millet worms, and scale insects. In the case of apple sponge, when the spot is generated in the garden, it can be wiped off by hand or brushed away. If the occurrence is widespread, besides spraying the above-mentioned agent on the whole branch, 10% imidacloprid wettable powder 1000 should be used at the same time. Irrigation times; if there are more cotton bollworms in the orchard, they can be sprayed with agents such as methotrexate and beta-cypermethrin, as well as lepidopteran pests such as pear borer and leaf roller moth; fresh defecation holes are found on the trunk, and they are immediately discharged with a syringe. Inject 50 to 100 times of dichlorvos, lesperm, or cypermethrin in the fecal hole, 1 to 2 ml, and seal the hole with mud. Be careful not to use the original drug injection to prevent phytotoxicity. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Illex Squid,argentine shortfin squid, southern shortfin squid, northern shortfin squid Zhoushan Boda Aquatic Products Co.,Ltd , https://www.baida-aquatic.com