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调查表明：野蛞蝓在永定烟田的消长表现为双峰型，峰日出现在2月中下旬和5月上中旬；影响消长的主要因素为空气相对湿度、降雨量、大田覆盖物、土壤质地、前茬作物等。
The survey shows that the growth and development of wild shrews in the Yongding tobacco field show a bimodal pattern, with peak days in late February and mid-May. The main factors affecting the growth are air relative humidity, rainfall, field cover and soil texture , The former crop and so on.