In May, as we enter the summer season, both the air and water temperatures experience significant increases. This period also marks the second molting phase for crayfish. So, what are the key management points that farmers should focus on? Let's find out.
Management Essentials for May Crayfish Farming
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Aquatic Plant Management: Various aquatic plants grow rapidly in May. When the aquatic plants become too dense, it is advisable to timely remove grass tunnels and paths to effectively promote water exchange and prevent the occurrence of lazy crayfish. Additionally, regular use of foliar carbon fertilizers promotes photosynthesis in aquatic plants, keeping the leaves clean, free from dirt, yellowing, and pests.
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Algae Control: During the rainy season in March and April, prolonged cloudy and rainy weather leads to poor water quality and the growth of algae. After the weather becomes clear in May, it is recommended to manually remove algae without blindly using chemicals. If necessary, reduce water transparency through fertilization or water adjustment to make the algae shrink and disappear.
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Water and Bottom Management: In May, it is recommended to use all-purpose bottom improvement tablets every 7-10 days to decompose organic matter at the bottom and improve the bottom environment. Additionally, every 10 days or so, use golden probiotic fermentation liquid to regulate the aquaculture water to maintain a fresh water quality.
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Feeding: While feeding with high-quality pellet feed, it is advisable to add some products that promote digestion and resistance to low oxygen levels, including vitamin C, complex vitamins, and a small amount of essential ionic nutrients. This aids in the molting and shell absorption process of crayfish.
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Pond Inspection: Regularly inspect the ponds and pay attention to the molting situation of crayfish. If abnormal molting situations such as molted crayfish on aquatic plants or a large number of crayfish molting at the pool edge are found, it may be due to insufficient dissolved oxygen in the water. It is crucial to strengthen aeration and auxiliary aeration work.
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Disease Prevention and Control: Mainly aimed at the prevention and control of bacterial diseases such as enteritis, shell rot, limb rot, gill rot, and black gills. These diseases are mainly caused by rapid bacterial reproduction due to dirty bottoms. Generally, disinfection and bottom improvement work can effectively prevent them. Pay attention to internal prevention as well. Recommended regimen: Dinococcus + Hepatobiliary Taylor + Golden Polysaccharide, which can protect the liver and gallbladder and strengthen the body.
In summary, in early May, crayfish will undergo the second molting phase. To ensure smooth molting, growth, and increased survival rate, farmers must diligently implement the above management essentials.
