In the soil, it is called a barren insect, and the thunderstorm after beginning of autumn is called a landscape cow. Who knows its growth cycle?

The scientific name of this insect is sawblade beetle, which occurs once a year 1 generation and overwinters as mature larvae. The mature larvae pupate in the soil the next spring; The pupa is about 5~6 cm above the ground. Adults emerged in mid-May and remained in the soil after emergence. After the sultry thunderstorm in May and June, a large number of adults were unearthed to mate and lay eggs. Eggs are laid on wet lawns in nurseries or in places with more weeds. Larvae inhabit the soil, which has damaged 1 1 month. Metarhizium anisopliae parasitize in larval stage.

Distributed in Beijing, Hebei, Liaoning, Henan, Shaanxi, Shanxi, Hubei, Hunan, Shandong, Taiwan Province, Anhui, Zhejiang, Jiangsu, Shanghai, Inner Mongolia and other regions. Harm the underground stems of lawns such as Zoysia tenuifolia, Bermuda grass and weeds; It also harms willow, Pterocarya stenoptera, Metasequoia and other trees. Eating the roots of hosts with larvae in the soil will cause the lawn to wither.

In terms of prevention and control, in March-April and July-June, 65438+ 10, water was sprayed on an acre of land with high soil strength of 2-3kg, or1000-1500ml of water was sprayed to effectively prevent and control larvae and adults; Spraying 200ml of diflubenzuron per mu from May to June can kill eggs.