(1) Living habits: The mature larvae overwinter in the basal stalks of the rice stalks in the base stalks of the rice stalks, and the adult mites (moths) during the second year of breeding. Adults have strong greening and phototaxis. They lurk in the lower part of the seedlings during the daytime. When they are alarmed, they quickly fly up and down, and come out in the evening, or make ends or spawn. A female moth spawns at least one piece, up to five pieces, and about 300 pieces. The egg has a long oval shape and is slightly flat. It is prolific on the middle and upper leaves. It is milky white at the beginning, grayish black when it is mature, and covered with a layer of brown hair, like a half-grained soybean. The hatched anthill stalks along the leaf sheath of the leaf into the base of the young stem, or quickly climbs up the tip of the leaf and hangs down, falls on the nearby plants with the wind, breaks in from the gap of the sheath, bites the young stems and leaves, makes the leaves Involution, resulting in "heartless group." At the booting stage of rice, the young ears are bitten, and after the heading, the upper stem section is broken into white spikes. In general, it takes only 20 minutes and 30 minutes for the ants to move from hatching to stalking. When the environmental conditions are unfavorable, the ants will die in large numbers. Rice is most beneficial to the intrusion of ants in the tillering and booting stages, and the damage is the most serious. After the round rod and the head, the tissues and organs are harder, and the ants are not easy to break in.
(2) Control methods: A variety of measures should be taken for comprehensive prevention and control.
1 low insect source. Autumn harvested rice is cut as much as possible to kill some larvae and destroy wintering places, and increase the mortality of wintering larvae. In the paddy fields where the locusts are seriously damaged, winter green manure or early-maturing winter crops are arranged. In the middle of May, the plough is flooded for 3 days to 4 days.
2 In the early stage of the emergence of white spikes, a large number of larvae are still harmful in the upper part of the plant. The white-eared plants should be pulled out from the rice fields as soon as possible to reduce the damage of the larvae and reduce the source of overwintering insects.
3 Combine the weeds in the field and remove the eggs.
4 pesticide control. Do a good job of forecasting and forecasting, and apply the pesticide at the peak of hatching. The medicament may be selected from the group consisting of insecticidal insecticide, insecticidal double, special acaricidal, triazophos and the like.
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