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蜗牛又名天螺,为害棉花、豆类、瓜类等多种作物。我省棉区常年都有局部地区大量发生,为害较重。蜗牛在早春和秋末冬初为害绿肥、油菜、蚕豆和麦子。棉苗出土后,转移为害棉苗。蜗牛繁殖的适宜温度为20℃,湿度为80％以上。因此,4月中旬至5月中旬为害严重,常造成棉田缺苗断垅,甚至补种数次,对棉花的全苗早发影响颇大。特别是头年蜗牛发生多的田、地势低洼潮湿的田以及前茬蚕豆与草子绿肥田为害最重。
Also known as snails snail, damage to cotton, beans, melons and other crops. The cotton area in our province has occurred in large numbers in some areas all the year round, causing serious damage. Snails damage green manure, canola, broad beans and wheat in early spring and late autumn and early winter. Miaomiao unearthed, the transfer of harm cotton seedlings. Snail reproduction suitable temperature is 20 ℃, humidity is above 80%. Therefore, from mid-April to mid-May devastating, often resulting in lack of seedlings broken cotton fields, and even replanted several times, the whole crop early cotton have a significant impact. In particular, the first year snails occur more fields, low lying wet fields and the former crop of broad bean and grass green fertilizer most harmful.