Since the salmon that are stocked in paddy fields have small yields and are susceptible to predators, the yield is reduced. Therefore, it is very important to prevent predators.
First, a month before the release of water bream, Mushi Shicha 60 kg can kill leeches. If leeches are found during the stocking period, the squid and otters can be fished into a cage and sprinkled with the appropriate amount of kerosene so that the leeches can suffocate after reaching the kerosene.
Second, the tiger frog in the first half of the month before the release of fry, Mushi lime 20 kg, can kill all the tiger frog frog, over 3 days to 5 days, and then every 5 kg of fresh pig blood plus 2 kg of flour made of granular , Into the rice field to kill tiger frogs 2 times, the effect is excellent.
Third, water snakes may be trapped with snake traps or bamboo cages, or during the hot nights, the snakes in the shallow waters will be caught and killed manually when they catch cold.
4. The grasshopper put loofah containing coagulated pig's blood in the pores in the field ditch in the evening, put 8 to 10 mu, and collect loofahs in the morning to kill the grasshoppers that entered the network.
5. The lake algae This algae can't be digested because it has glial membranes. After the algae die, the sediments will produce toxic substances in the bottom of the trenches, which will cause the fish to die. Can be used in every cubic meter of paddy field water with 0.5 grams of copper sulfate dissolved in a suitable amount of water to the fish ditch to kill the lake.
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