Due to the good water quality and sufficient bait in the main culture ponds of the shrimp, the snails grow fast and have strong fertility. They compete for water in the pond and compete for space, affecting the yield of the shrimp and thus affecting the efficiency of pond culture. How to control and control the snails in the pond is the key to the cultivation of shrimp in ponds.
Snail killing method
1. Low winter temperatures snail hiding in the soil, not moving, not feeding, winter shrimp pond dry pool, the use of drugs to remove the effect is not good, the best time to use the medicine after the spring flowers.
2. Snails like to feed at night, it's better to spit up the snail drug in the evening, and the effect is better.
3. Most of snails are located on the banks of the pond. Some of them may be above the water line. Before preparing sprinkling medicine to remove snails, it is best to add more than 20 water to the pond. Sprinkle the medicine immediately after water is stopped. The effect is better.
Clear time
At the end of April, ponds for breeding young shrimp can be mixed with clear pond drugs and clear snails to remove trash and snails in the pool. The “clean†3 mu/m water depth produced by Hubei Xingwang Pharmaceutical Co., Ltd. uses 1 bottle of “Zuoluling†produced by Wujin Dekang Pharmaceutical Co., Ltd., and the whole pool is splashed with sprinkling time in the evening. The full water level of the pond can remove more than 95% of the snails in the pond.
At the end of June, 10 days before the stocking of the main culture ponds and shrimps, the water was added to kill the snails and disinfection was performed at the same time. "Bulletin" 1 bag / acre + copper sulfate 0.35 kg / acre + trichlorfon 0.01 kg / acre, Quanchiposa.
From July to October, if there are many snails found in ponds of shrimps, because the trout has been put into the pond, only “bags first†of “Xiangluo†produced by Hubei Xingwang Pharmaceutical Co., Ltd. can be used for drug selection. It can effectively kill snails in the pool and does not affect the normal growth of fish and shrimp.
Spirulina drugs
Niclosamide is a general snail control drug. It has a high rate of molluscicidal treatment, a slow action, and a long residual effect of snails. It has a good effect at temperatures above 20°C. This product is harmless to humans, animals and plants. It is also harmless to shrimps and toxic to fish. However, it has only a short half-life in water. After using this type of fish killer, it can take only a few days to put new fish.
The main ingredient of the snail drug mentioned in the article is niclosamide. The formula and drug content are not the same, so the effect achieved is not exactly the same. The snails and fish in the pool of "destroyed screw" all died. The snails in the "qingluo first" pool died and the fish did not die.
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