Enemy damage of farmed soil yuan and its prevention and control

The natural enemies of Trionyx sinensis (Tuyuan) are mainly mites, ants, mice, poultry, birds, rat women and so on.

The main results are as follows: 1. Mites (1) are mainly acaroid mites that harm soft-shelled turtle insects (soil yuan). They are a kind of mites growing in deteriorated feed or rotten soft-shelled turtle insects (soil yuan), which are easy to occur in the plum rain season with high temperature and humidity. The leftover feed and residue of Trionyx sinensis (Tuyuan) are very easy to breed mites in the environment of 20-25. The fecundity of mites is very strong, one generation every 14-16 days, each female mite can lay more than 200 eggs, which is easy to cause harm. The larvae and adults of acaroid mites live in the internodes of chest, abdomen and leg base of Trionyx sinensis, bite the body of Trionyx sinensis, and eat the nymphs and molting nymphs that have just hatched. If the mite damage is not eliminated in time, it will often cause a large number of deaths of Trionyx sinensis (Tuyuan). (2) ① control methods are often checked. If there are piles of white peristaltic mites on the surface of the culture soil, remove them immediately, take out all the culture soil and discard it, or put it in the hot sun to kill acaroid mites, and sift out all the soft-shelled turtles (soil element) and replace them with new breeders. Do not place cottonseed, straw and other crops near the ② culture pond, so as to prevent parasitic mites from climbing into the pond; do not feed too much each time, and remove the remaining feed residue, turtle carcass, egg sheath empty shell, etc. ③ traps acaroid mites. Cruller, meat and bone can be used as bait, put into the pool during the day, take out every 2 hours, and burn the attached mites to death with boiling water. The effect is better for many times in a row. The mites on the wall of the pond and on the surface of the breeding soil can also be burned to death by fire during the day. ④ drug prevention and treatment. 2000 times of dimethoate emulsion can be used to spray the west pool surface, once every 5-7 days, continuous spraying 3N4 has a certain effect (but the liquid can not be sprayed on the worm). ⑤ found that Trionyx sinensis (Tu Yuan) with mites can be processed into finished products. ⑥ improved the feeding method. Soak the bran and rice bran in boiling water or bake them in a pan and then feed them to avoid mites in the food. 2. The mouse woman (1) harmful to the mouse woman is a kind of crustacean, which often moves on the surface of the culture soil (surface) and around the pond wall, grabs the feed of the turtle worm (Tuyuan) and harms its young nymph. (2) ①, do not bring sundries such as rice straw and grass shavings into the culture pond to eliminate the breeding source of rat women. ② found that there was a mouse woman, which could be caught manually. If the rat woman is in the hole outside the pool, she can be forced to climb out by irrigation so that she can be caught. ③ can be sprayed around the culture pond with trichlorfon solution. 3. Ants can open trenches and inject water around the breeding pond to prevent ants from invading. If ants are found in the pool, meat bones and Youtiao can be used to trap and kill them outside the pool. In addition, for enemies such as chickens, ducks, cats, rats, geckos and spiders, in addition to covering pits and pools, gaps such as walls and door seams around pits and pools should be plugged in time; on hot days, lead wire woven yarn should be replaced above pits and pools to facilitate ventilation and heat dissipation; geckos and spiders can also be captured manually.