Citrus pest control tips

March 11, 2023

Citrus rust mites can reproduce for up to 3 generations in September, causing serious damage to citrus fruits. It stabs into the fruit epidermis, destroys the oil cells, forms small spots with red spots on the fruit surface, reticular cracks, presents corkification, the skin is rough and dull, the fruit is small and hard, and the skin is thick and sour. This is called "the victim's fruit." "Bronze" has no economic value; Citrus fruit is often referred to as "brass" or "red copper" when it is ripe.
Control methods: Pharmacy can be used 15% Dai Ling emulsion 1500 times, 1.8% avermectin EC 3000 times and 99% SK mineral oil 200 times, 73% Ketel EC 2000 times, 24%. Suspension agent 4000 times liquid, 80% of large wettable powder 600 times, these agents can also cure a variety of diseases. Spray once every 10 to 15 days, spray 2 to 3 times.
Citrus red spider has a close relationship with the temperature, 20 Â°C ~ 30 Â°C is the appropriate temperature for its development and reproduction. If the temperature exceeds 35 Â°C, it will affect its survival. When the temperature reaches 40 Â°C, the mortality rate is high. Therefore, citrus red spiders are lighter in the hot season and have less harmful effects. If you have grasped the prevention and treatment of the early stage, you do not need to use drugs to prevent and treat during the high temperature period. If there is no prevention or control of the early orange tree, or more current population of the orange tree, you must spray quick-acting agents, such as bufalin, triazolam, etc., to eliminate the source of insects, reduce the risk of the next generation of pests.
There are many types of citrus beetles and scale insects, which are very harmful. They are mainly shielded species, such as S. acuminatum, L. striata, S. acuminata and S. acuminata. If it is not controlled in time, after the age of the worm is large, the effect of the medication will be deteriorated. After the fruit of the cricket pests is on the fruit, it will cause freckles on the fruit surface, reduce the fruit quality, and reduce economic income. The high temperature season is the spawning and incubation period of quail eggs. We should do a good job in prevention and control. At present, it is necessary to catch the pups (before the second instar) and spray them. At this time, the pups have thin waxes on the body surface, and the liquids are likely to infiltrate into the insects, and the killing effect is good.
Control methods: Pharmacy can choose to use 40% chlorfenapyr EC 1000-1500 times, 25% fluocin WP 1000 times, or use 99% SK mineral oil 200 times and 1.8% avermectin emulsion 2000 times Liquid mixing, better control effect, but also can cure lice. During the pupal period, 40% of Leth Ben EC can be used to kill pupae.
Pay attention to the control of black spot, black spot disease, anthrax, macular disease and ulcer disease. During this period, various pathogens are easy to infect leaves and fruits, and when the fruit matures, lesions appear and the quality of the fruit is reduced. Practice has proved that despite the use of drugs to prevent scabs and ulcers in the early stages, it is necessary to exempt the disease from infection in the later stages and to prevent and treat it completely. The key is to prevent and treat this disease in September.
Control methods: spraying 80% of Taisheng WP 600 times, 43% of Halonic suspension 5000 times, 75% of chlorothalonil WP 800 times, copper preparation of 600 to 800 times liquid to control these diseases . When trunk flow occurs, the diseased tissue should be scraped off, and then bactericide such as 402 fungicide, 843 rehabilitant, and lime sulfur must be applied.

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