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June is a key period for the prevention and treatment of kiwifruit's small salary and brown spot disease. This period is the early stage of kiwifruit pests and diseases, the amount of insects is small, the disease is light, the cost of prevention is low, and the effect is good. It is very important for the production of kiwifruit in the middle and late stages. Prevention and control can effectively control the disease and insects, minimize damage and loss, and have a significant impact on the annual production. The majority of fruit farmers should attach great importance to it and should not be ignored. Recently, rainfall is abundant, temperature is high, humidity is high, and meteorological conditions are very beneficial to the spread of pests and diseases. Kiwifruit's small salary and brown spot disease have been sporadically threatened. It is necessary to seize the opportunity and do a good job of prevention and control to ensure the safety of kiwifruit production. The main points of prevention are as follows:
1. Strengthen management and reasonable fertilizer. Implement the orchard standard management work, set the fixed fertilizer, reasonable load, ensure the tree grows vigorously, and improve the resistance. To avoid large fat and excessive load, it is easy to cause root damage, the tree is weak, and it provides favorable conditions for pests and diseases.
2. Reasonably regulate tree growth, balance tree potential, and improve stress resistance. For yellowing trees and small old trees, it is possible to regulate and promote growth and strong tree potential. For the growth of vegetative growth, PBO can be used to control and improve the physiological and metabolic balance of trees. Through scientific regulation of tree potential, enhance disease resistance and insect resistance.
3, chemical control of brown spot, small salary A.
(1) In the middle and late June (preventive protection): 80% of the Dasheng M45 wettable powder 800 times + 48% chlorpyrifos microemulsion 2000 times; or 250 g / liter of Amishida suspension 2000 times + 4.5% efficient Cypermethrin microemulsion 1500 times; or 70% propionate zinc wettable powder 1000 times + 2.5% high-efficiency flumethrin microemulsion 2000 times spray control.
(2) In early July (treatment and prevention): in the occurrence of the hazardous period, 60% Baitai water dispersible granules 1000 times + 48% chlorpyrifos EC 1500 times; or Tsui seedling 3000 times + 10% cypermethrin microemulsion 2000 times; or 10% benzene Ether methylcarbazole wettable powder 1500 times +4.5% beta-cypermethrin 1500 times spray control.
4, note:
(1) Avoid medication during high temperature period, before 11:00 am, after 4:00 pm, to avoid phytotoxicity.
(2) Use foliar spray fertilizer cautiously, use regular foliar spray fertilizer, conditioner, regulate the dosage, and choose or use it improperly to cause phytotoxicity.
(3) It is forbidden to use the remaining medicines opened in the next year to prevent the deterioration of the products, and to cause phytotoxicity to the young leaves and young fruits.
(4) Before and after medication, the application equipment should be cleaned, the herbicide equipment should be used exclusively, and the safety protection of the operators should be done at the same time.
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