First, the harm symptoms: Sputum often bite off the corn roots, so that the seedlings die, so that the roots of adult corn plants damaged, causing serious reduction in production. Its adult chafer, in the maize filling stage, harms the ear, especially the corn husks don't pack tightly. The beetle gathers in groups, and the severely damaged ear is ploughed down one-third of the grain from the tip of the ear.
Second, control methods: (a) agricultural control. In the spring and autumn season, cultivating and picking up the hoe while plowing, or turning the hoe over the surface, through the frost and the sun, to reduce the damage in the next year. (b) The black light traps the beetle. Most chafers have phototaxis, and using black light to seduce them at night can reduce the damage of chafers to corn kernels.
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