Basically, this small bug is harmful in the fish farming industry, mainly to very small fry, and crayfish have not heard of any harm, because crayfish eat everything, it is omnivorous. In addition to eating aquatic plants, adult shrimp will also prey on animal protein sources such as crustaceans, molluscs, and aquatic insects.
Pest control is mainly based on artificial fishing, using 8-wire round nets with a diameter of 30 cm. The mesh bag is made of 6080 mesh white cloth, 80 cm long, bottomless bag, one end sewn on a round line with a handle, and the bottom of the bag is fastened with cloth strips. 16 mesh slits on the metal wire mouth, with a long handle. Back and forth in the phishing pool.
Scratching bugs are tiny, making a very loud sound under the water, which can be clearly heard on the shore, and the scratch bugs are no more than 2 mm long, and compared to their tiny size, the scratch bugs are undoubtedly the largest animals on the earth.
According to the experience of local shrimp farmers, if this insect body is found in the crayfish pond, it is basically artificially salvaged, because it has not been found to have direct harm to the crayfish.
Also if the pool is clean and there is no food, they will leave without food. There are also flying insects that will fly out at night to find water, and if there is a light in the pool at night it may attract a lot of things, and then see you in the water during the day.