According to the Chinese Pesticide Network , lychee has rickets, and lychee leaves, young shoots, spikes and fruits can be harmed. Timely treatment is the key.
Morphological characteristics of lychee mites: The corpus callosum is extremely small, generally invisible to the naked eye, and has a body length of about 0.2 mm. 2 pairs of light yellow to orange yellow feet, the abdomen is tapered, and there are 1 pair of long hairy pseudopods at the end. The egg is spherical, pale yellow, translucent and smooth. If the body is slightly smaller, the body color changes from grayish and translucent to light yellow.
The habits of Litchi lychee: In the Guangzhou area, Litchi can occur in 16 generations in 1 year, overlapping generations, and overwintering in the late autumn shoots or winter-top felts in the canopy. The main damage period is that the new shoots of litchi have just sprouted to the small compound leaves.
The characteristics of the pathogenesis of litchi mites: leaf damage, bulging and twisting; young shoots suffer, distortion and deformity; flower ear is damaged, flower rust is brown, often full panicle deformed dry shrink; fruit is damaged, fruit is small and sour.
Control method of litchi mites:
1) Ecological control orchard interplanting Huoxiangyu, do not weed before and during the shoot, can maintain the ecological balance of the orchard, promote the habitat of natural enemies, and achieve the purpose of controlling cockroaches.
2) Pesticide control In the case of high density of insects, before use, before the start of the shoot or before the development of the young leaves, 25% of the Lepa WP 1000-1500 times, 20% Apollo suspension 1500-2000 times, 73 % gram emulsifiable concentrate 1500-2000 times liquid.
3) Agricultural control combined with litchi after harvesting, remove the scorpion as a harmful branch and over-tight shade branches, weak branches, diseased branches, so that the crown can be properly ventilated and light-transmitted, which can significantly reduce the source of insects, and is not conducive to sputum. Controlling winter shoots is also an effective measure to reduce the source of insects. Especially important for young trees.
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