The scientific name Bradybaena ravida ravida (Benson) gastropoda, stalk eyes, bar snail family. Alias ​​conch, buffalo. Distributed in various areas of the country.
Host Jute, kenaf, ramie, cotton, beans, corn, barley, wheat, vegetables, melons and so on.
Injury features hurt the leaves into a short cut, serious biting off Ma Miao, resulting in lack of seedlings broken ridge.
Morphological characteristics Shell medium size, slightly thick shell, strong, spherical. Shell height 19mm, width 21mm, there are 5.5-6 spiral layer, the top several spiral layer growth is slow, slightly expansion, rapid increase in body spiral layer, inflated. The shell is yellow-brown or amber and has detailed and dense growth lines and threads. Top shell. The suture is deep. The mouth of the shell is oval-shaped, with complete mouth, slightly folded outwards, sharp and fragile. Axial edge at the umbilicus at the outside fold, slightly cover the umbilicus. Narrow umbilicus, slit-like. Individual size, color variation. Oval spherical, white. Living habits are one of the terrestrial molluscs that are common in China. It happens everywhere. In Shanghai and Zhejiang, they are born 1 year old. In late November, Chengbei and young larvae live in winter under the objects in the fields, the fallen leaves, and the houses behind the houses. The activity began in mid-March of the following year. The snail lurked during the day and took it in the evening or early morning, and inhabited on the plants in rainy days. From late April to mid-May, Cheng Bei began mating, and soon after the eggs were piled up in the wet soil of the plant's rhizomes, the eggs produced had mucus on the surface, and after drying, the eggs were stuck together into blocks. The hatchlings are clustered together and feed on food. When they grow up, they are dispersed and infested. In warm and rainy weather and wet fields, the victims are heavy; in high temperature and dry conditions, the snails often seal the shells and lurk in the wet earth seams or under the stems and leaves. When the conditions are right, after the rain or irrigation, in the evening Or go out to eat in the morning. In late November, winter begins again.
Prevention methods (1) Manual capture in the early morning or rainy day, concentrated killing. (2) Apply 3kg of tea cake powder or 1kg to 1.5kg of tea cake powder, soak it for 24 hours and then take the filtrate. Also use 50% phoxim EC to spray 1000 times. (3) Use 8% chlorhexidine granules 1.5-2kg per 667m2, crush and mix 5-7kg of fine soil or cakes, and withdraw from the roots of the affected plants near the roots of the affected plants in warm weather. After 2-3 days, the snails exposed to the medicament secrete a large amount of mucus and die. The proper period of prevention and control is suitable for the snails to lay eggs, and the small snails in the field are better for preventing one more time.
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