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龙虾(凯氏螯虾),是一种偏肉食性的杂食性虾类。大量吞食、伤害小鱼苗,给养鱼生产带来损失。现介绍几种简便易行的防除方法,供参考。(一)放养前清塘①生石灰清塘。干池清塘时,池中留水层7～10厘米,每亩用生石灰50～75公斤,用水化开后,泼洒全池;带水清塘,保持1米水深,每亩水面用生石灰125～150公斤,用法同上。②漂白粉清塘。塘中留水深1米,每亩水面用量13.5公斤;若排水清塘,留5～10厘米浅水层,每亩水面用药5～10公斤。(二)设网隔虾用0.5毫米的尼龙网过滤,防止龙虾进入鱼塘。
Lobster (Crayfish) is a carnivorous omnivorous shrimp. Swallow a lot, hurt the fish fry, bring losses to fish production. Now introduce several easy to control methods for reference. (A) stocking clear pond ① clear lime pond. When the ponds are cleaned up, the aquifer in the pond is 7-10 cm in diameter, with 50-75 kg of quicklime per mu. After watering, sprinkle the whole pond; ~ 150 kg, usage as above. ② bleach powder clear pond. The pond water depth of 1 meter, the amount of water per mu 13.5 kg; If the drainage of clear ponds, leaving 5 to 10 cm shallow layer of water per mu of medication 5 to 10 kg. (B) set net shrimp with 0.5 mm nylon mesh filter to prevent the lobster into the pond.