Control techniques of main pests in litchi and longan

1. More than 50 species of pests have been found in litchi and longan, of which the occurrence is common, and the more serious pests are litchi bug, litchi stem borer, litchi tip moth, longan Haimai moth and longan planthopper. Among them, the first four species damage both litchi and longan, and the horned wood lice only damage longan. Litchi bug and litchi stem borer are the most serious damage to litchi and longan in our province. 2. Control methods 1. Integrated control of main longan pests: longan orchard is generally applied 4 times a year, the first time after spring pruning, when the spring shoot is 5ml / 8cm in early March, 80% trichlorfon 800x liquid plus 25% insecticidal double 500x solution is sprayed to control litchi bugs and wood lice, and depending on the occurrence of Spodoptera litura and Hai Mai moth, 3000 times liquid is added if necessary. The second time was carried out at the early flowering stage in the first and middle of May, and the 3000-fold solution or 80% trichlorfon solution could be used to control litchi bugs and nymphs. The third time is from late June to early July, when the summer shoots are 8ml 10cm after flowering, and the 10% efficient solution of 2000 and 3000 times can be used to control the sharp fine moth, stem borer and Hai wheat moth, as well as wood lice and litchi bugs. 2. Integrated control of main pests in litchi: it is generally applied 4 times per year for 5 times. For the first time in the spring shoot and flower bud stage, the focus is on the control of litchi bug bugs, which can be sprayed with 3000-fold solution in the middle of March. The second time in the young fruit stage, focus on the control of stem borer, and control litchi bug bug, generally in the litchi flower 10 days after the use of high-efficiency Baike 3000-fold solution or 25% insecticidal Shuang 500-fold solution. The third time in the fruit development period, focus on the control of stem borer, during the rapid expansion of the fruit, the beginning of the fruit color conversion period and 20 days before fruit picking, the control effect is the best with 10% high-efficiency Miaobaike 2000 and 3000 times liquid, and can also kill eggs. Shachongshuang plus dichlorvos can also be used in combination. For the fourth time, in the autumn shoot leaf expansion period, the main control of leaf-eating pests, such as stem borer, sharp moth, leaf rollers, gall mites, etc., can choose 3000-fold solution with high efficiency, or isocarbophos, dichlorvos, etc., to spray when the autumn shoots are just sprouting. In many places, due to the inconsistency of the growing season, it is difficult for farmers to grasp the exact time of timely spraying, so it is suggested that in the young fruit stage and fruit development period, while using 10% high efficiency to kill Baike, adding 5% carotene 1500ly2000 times solution can significantly enhance the egg killing effect, prolong the prevention and control period, and have an excellent effect on the treatment of felt disease.