Eat buds occur one generation a year. The larvae lived in the soil during the winter, and in early April, larvae were removed. In the middle and late April, when the jujube sprouted, jujube buds were excavated and the jujube buds were bald and gray. From late April to early May, adults copulate and lay eggs, which are laid on dates or in the soil of the roots. Incubation begins in mid-May. The larva lands on the ground and feeds on the roots of plants to grow and develop.

Control methods

Destroy the spring unearthed adults Before spring adult emergence, in the underground base of the outer radius of the trunk is within 1 meter of the underground, spray 1500 times liquid to kill the unearthed adults.

Before the adults of the upper tree adults were killed, a 20-cm-wide plastic sheet was tied around the tree, and a straw rope soaked with gods was tied in the middle to rewind the plastic sheet on the upper part of the straw rope to prevent the adults from harming the trees. At the same time, kill it.

In late May, when the mature larvae are about to enter the ground, a circle of 20 cm wide and used engine oil is used to block the larvae from entering the soil.

Adults that have fallen to the ground are killed and adult insects are suspended. In the morning or evening, a plastic sheet is spread under the trees, and branches are beaten every day or the next day. After the adult is shaken off the ground, it is manually destroyed.

The use of drugs to prevent adults on the tree harm period 7:500 times more than the use of + 1000 ~ 1500 times captured God or endosulfan 1000 ~ 1500 times spray control.

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