Life habits of beet nightshade: beet nightshade occurs in Chengde area 4 to 5 generations a year, adult night activity, phototropic. The suitable temperature is 20 to 23 degrees Celsius, relative humidity 50% to 75% is the most suitable humidity. Adults lay eggs for 3 to 5 days, and the egg period is 2 to 6 days. Larvae ****5 ~ 6 age, before the third age of cluster damage.

But the amount of food is small, after the fourth age, the amount of food increases greatly, day and night, there is a pseudo-death, when the source of insects is too large, the larvae can kill each other, the larval development lasted 11 to 39 days, the mature larvae into the soil spitting silk building room pupa, pupa development lasted 7 to 11 days. Beetle leaf moth is an intermittent occurrence of pests, the occurrence of different years vary greatly, in a year to July to August damage is heavier.