Control of diseases and insect pests of Oncomelania hupensis

Oncomelania hupensis is a mollusk of the family Oncomellidae, which is very similar to Oncomelania hupensis in appearance, with large size, wide diet, strong adaptability, fast growth and reproduction and high yield.

Morphological characteristics of Oncomelania hupensis

The individual is large, 100g to 150g each, and the largest individual can reach more than 250g. It is known as the giant longevity snail. Fushou snail shell is thin and meaty, and the edible part accounts for 48% of the snail's body weight, which is not only a delicacy, but also a high-protein feed. The snail is similar to the snail, but different in shape, color and size. The shell color of Fushu snail is lighter and yellowish brown than that of Fushu snail, while that of Fushu snail is bluish brown; the vertebral tail of Fushu snail is long and sharp, while the tail of Fushu snail is flat and short; the shape of Fushu snail is relatively round, while the cover of Fushu snail is flat.

Living habits Fushou Luoxi lives in fresh water with fresh water and sufficient bait, and lives in clusters in the shallow water near the pool, or adsorbs on the stems and leaves of aquatic plants, or floats on the water surface, and can leave the water for a short life. The most suitable water temperature for growth was 2532 ℃, and the growth rate decreased significantly when it was over 35 ℃. The highest critical water temperature for survival was 45 ℃, and the lowest critical water temperature was 5 ℃. In the vast area south of the Yangtze River, the snail can survive the winter naturally. So far, few diseases and insect pests of Oncomelania hupensis have been found, and few of them have been reported. However, some suggestions are put forward for reference: 1) the suitable temperature for life of Oncomelania hupensis is 10-40 ℃, the optimum temperature is 20-28 ℃, more than 40 ℃ will cause death, and if it is less than 10 ℃, it will go into hibernation. Attention should be paid to the prevention of high temperature in summer, because the water in the rice field is shallow, the water temperature may reach the upper lethal temperature in summer, and the content of organic matter in the bottom of the mud overwintering in winter should not be too high, otherwise it is easy to produce toxic substances and affect the overwintering of Oncomelania hupensis.

2) the snail is sensitive to the amount of dissolved oxygen in water. Normal life requires dissolved oxygen in water to be more than 4 milligrams per liter. When it falls to 3.5 milligrams, appetite will decline, and when it drops to 1.5 milligrams, it will cause death.

3) the breeding season of Oncomelania hupensis is from June to July (where there are conditions, there will be another egg in autumn). If you consider breeding yourself, it is best not to raise carp in the rice field where the snail is raised, otherwise the small snail will be eaten by the carp.

4) the use of pesticides in rice fields should not be used as much as possible; that is, low toxic pesticides should be used in combination, and should be used in sunny days; it should be used in half of rice fields.

5) Organic fertilizer can be used regularly in the growing season, the principle is a small amount of multiple times, should not be fertilized too much at one time.

6) in the process of breeding, it is best to have a certain micro-running water environment to ensure the dissolved oxygen in the water, but we must pay attention to the water source and do not use the water source with pesticides.

7) the economic benefit of mixed culture of Oncomelania hupensis with leeches, Loach and Monopterus Albus is better.