The planting area of king lychee is not large, so the yield is not very high, and the market price is still on the expensive side. To grow high yield and high quality litchi king, you need to do a good job of pest and disease control. King Lychee has many pests and diseases. Please introduce several common and harmful control work as follows:

1. Downy mildew

When the King Lychee fruit enters the semi-mature or fully mature period, it is most likely to be infected with lychee downy mildew, which causes fruit disease from the fruit tip. With the growth of time, the scope of the disease spot will slowly expand until the lychee fruit is completely rotten and lose its edible value. Prevention and control methods are mainly in the lychee into maturity before the use of drugs to control lychee downy mildew, with commonly used agents such as 25% gray mold 800 times liquid or 77% wettable powder 800 times liquid spray crown control of lychee downy mildew.

2. Litchi stink bug

Litchi stink bugs will gather around the young leaves and stamens of litchi to feed and lay eggs. When the eaten young leaves and stamens lose their original nutrients, they rot and brown streaks appear. When a large amount of nutrition disappears, they will no longer bear lychee fruits, resulting in a sharp decline in lychee production. Preventive measures can be used 900 times trichlorfon or 20% pyrethroid, or feeding natural enemies that protect litchi stink bugs, such as wasps and praying mantis.

3. Litchi borer

Litchi borer eats litchi fruits. In the young fruit stage, the kernel is eaten, causing massive fruit drop. In the fruiting stage, the larvae feed between the stem and the kernel, leaving behind dark brown powdery feces, which seriously affects the yield and quality of litchi. Protect and utilize natural enemy resources. There are many types of natural enemies of the lychee moth, including spiders, ants and lacewings, which can also be controlled by chemicals. Use pyrethroids and pyrethroids to kill adults and eggs, spraying every 7 to 10 days.

4. Lychee geometrid

Lychee geometrid is extremely harmful in groups. In severe cases, it can gnaw on young lychee leaves and stamens and baldness. Preventive measures can be used chemical agents, such as BT preparation 800 times, 1.8% abamectin emulsion 1000 to 1500 times, on the newborn roundworm larvae sprayed 1 to 3 times, an interval of 7 days. In addition, natural enemies can be utilized for control. Lychee germination release red-eye wasp, 2000 ~ 3000/667m2, 1 ~ 3 times, every 2 ~ 3D.