What is a longevity snail? How to control Oncomelania hupensis?

What is a longevity snail? How to control Oncomelania hupensis? Also ask the netizens who know to help introduce the Fushou snail, also known as the big bottle snail, the apple snail, which is native to the Amazon River Basin in South America. Introduced into China as an edible snail in 1981, it has become a harmful alien invasive species because of its strong adaptability and rapid reproduction. Therefore, the farming network has sorted out the harm and control methods of Oncomelania hupensis, which are listed in detail below for netizens' reference. The harm of Oncomelania hupensis: because the snail eats a lot of food, and can eat very rough plants, but also scrape algae, its excrement can pollute the water. It is obvious that the loss to rice production greatly exceeds its value as a delicacy. In addition to threatening the invading aquatic shellfish, aquatic plants and destroying the food chain, the snail is also the intermediate host of Echinostoma spiralis and Angiostrongylus cantonensis. After hatching, the longevity snail begins to eat aquatic plants such as rice, especially the tender parts. The longevity snail is a new pest. The main damage period is from transplanting rice seedlings to before drying the field. It bites and cuts the main tillers and effective tillers of rice, resulting in a decrease in effective panicles and a reduction in yield. In addition, the shell of the snail is sharp, and it is easy to scratch the hands and feet of farmers, and the snail's food is miscellaneous and harms the lotus root. The young snail can gnaw the lotus leaf from the bottom of the leaf, causing the lotus leaf to be perforated or engraved, and in serious cases, the leaf is riddled with holes and difficult to pull out of the water. The prevention and control methods of Oncomelania hupensis are as follows: first, ducks can be raised to feed on snails, and the duck release time is from 7 to 10 days after rice transplanting to the late booting stage of rice. Every morning and five or six o'clock in the afternoon, ducks (30 ducks per mu) are released to rice fields and canals to peck at young snails, so as to reduce the number of snails and reduce harm. Method 2. During the peak spawning period in spring, the egg blocks in the fields and ditches were removed and taken away from the rice fields to feed ducks or crushed. When drying the field, the adult snails are mainly concentrated in the inlet and drainage and the seedling ditches, and the snails are picked up manually in the morning and afternoon. Artificial removal of egg blocks and picking up snails when combined with farming. When drying the field, the adult snail is mainly concentrated in the inlet and drainage and the seedling field ditch to collect the snail manually, which can also control the damage. Method 3. After the paddy field was flooded, 30cm high bamboo slices (wood strips and rape straw) were inserted into the paddy fields by artificial trapping method to induce Oncomelania hupensis to lay eggs on the bamboo slices (wood strips and straw). The egg blocks were removed and destroyed every 2 to 3 days. The quantity of 3080 bamboo slices (wood strips and straw) per mu should be planted near the edge of the field to facilitate the removal of egg blocks. Methods 4. Chemical control methods were adopted: 1. The dosage of 10% snail curl granule per mu was about 400 to 500 grams per mu in rice seedling field at the stage of 2 leaves and 1 heart, and it was evenly spread in the field or mixed with fine soil 5~10kg. 2. When transplanting rice, the dosage of 6% Mida molluscicidal granule is about 400g to 550g per mu, and it is evenly applied in the field or mixed with fine soil 5~10kg; if the snail damage is serious, the medicine can be applied again every 10 days. 3. 70% spirosemide ethanolamine salt wettable powder can also be sprayed with 60 grams of water and 20 kilograms of water per mu. Matters needing attention: the water layer in the field is 1cm to 3cm and the water is preserved for 7 days. If it rains heavily within 24 hours after application, it needs to be replenished once. Molluscicide is toxic to fish. 7 days after application, the field water should not be discharged into the fish pond, and the stocking of ducks is prohibited. How to make an armyworm board? what is a grub?