Rice field molluscicide can use snail amine
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June 26 10:59:15, 2025
Chen Kaijin, from Dongba Town in Gaochun County, reported on June 9 that many rice fields in the area are suffering from a severe snail infestation after transplanting rice seedlings. The snails are thin and elongated with delicate shells. He noticed that up to a dozen or even more rice plants per square meter were affected, with the seedlings wilting and the leaves turning pale and losing their green color. Chen is asking for advice on what kind of pesticides can be used to control this problem effectively.
Currently, there are several registered pesticides available for snail control in rice fields. These include chlorprobenolamine, chloricamine ethanolamine salt, triphenylacetic acid tin, and tetraacetaldehyde. Among these, tetraacetaldehyde is typically formulated into granules, which may help reduce damage to rice leaves caused by snails. On the other hand, the chloricamine ethanolamine salt and the talconic acid salt can be applied as granules or sprayed directly with water. For the described situation, spraying might be a more effective method.
Several products are suitable for spray application. For example, "Shiramid Amine" (70% WP) produced by Jiangsu Qiaoji Biochemical Co., Ltd. is effective against rice field snails, with a recommended dosage of 30–40 grams per acre. Another option is "Baixusha" (70% Chlorhexidine WP) from Bayer, and "Spirolacin" (25% Chlorsulfamethanolamine WP) made by Zhejiang Jiben Pesticide Chemical Co., Ltd., which is registered for controlling golden snails at a rate of 100–120 grams per mu. Additionally, "Snail" (50% Chlorhexidine Ethanolamine Salt WP) is also an option.
Chlorproguanil (also known as Bermospira, Chlorospiro, and Bezol) is a phenolic organic molluscicide with a half-life in soil ranging from 1.1 to 2.9 days. It becomes effective at concentrations of 0.3–1 mg/l in paddy fields. When using such chemicals, it's important to take safety precautions. Farmers should wear protective clothing, masks, goggles, and rubber gloves to avoid poisoning.
Another commonly used product is chlorpromazine ethanolamine salt (also called Spiro extinguishment or Niclosamide Ethanolamine Salt), which acts through stomach toxicity. It is highly effective against various mollusks like snails and has low toxicity to humans and animals. It’s easy to use and can be diluted with water. Both of these substances are effective against a wide range of harmful mollusks, including snails, slugs, and crickets. However, they are toxic to fish, frogs, and shellfish, so careful application is necessary. (By Fang Yuanqing)