With the adjustment of planting structure, the planting area of ​​sorghum and corn has been continuously expanding, and the rules for the occurrence and control of sorghum sorghum are described below. Sorghum is a member of the order Lepidoptera and Acrididae. Known as sorghum borer is the main pest for sorghum and corn. Identification: Adult females are 14 mm in length and 12 mm in length. The back of the head is grayish yellow and yellowish white on the abdomen. The compound eye is dark brown and the lower lip must be long and straight forward and downward. The forewings are yellowish gray with sharply pointed vertices. The outer edge is slightly rectilinear. The lower part of the vertex is slightly concave inward. There are nearly 20 dark brown lines on the outside of the wings. There are 1 black dots on the outside of the middle and the black spots on the male side. Compared with female moths, there are 7 small black spots juxtaposed on the outer marginal veins. The color of the hind wings is lighter, the female moth is nearly silvery white, and the male moth is light yellow. Eggs are oval and flat, approximately 1.3 mm and 0.7 mm in size, and have a fine tortoiseshell pattern on the surface. The first milky white, yellow-to-yellowish-yellowish-yellow, egg-like rows of "human" shaped double-row overlapping squama-like egg masses. The larvae are milky white when they are newly hatched, and have light brown spots on the body surface, and are even streaked. The larvae have a body length of 20-30 mm and are of winter and summer type. The larvae of the summer larvae had four lavender vertical lines on the abdomen and abdomen, and between the abdomen's abdomen valves, there were four dark brown hairs near the front edge of each larva, arranged in rows. The middle two were larger, nearly circular, and all had bristles. There are also 2 dark brown hairs near the trailing edge, nearly oblong. After the winter-type larvae are peeled off before the winter, the dark brown hairy pieces of the decent body become white, and there are four purple-violet vertical lines on the back of the body. Carcass length 14 to 15 mm, red brown or dark brown, shiny. There are dark brown irregular reticular patterns on the abdomen of the abdomen of the 5th to 7th section of the abdomen. There are two pairs of sharp and small protrusions on the back of the distal segment. Occurrence pattern: In the sorghum and corn stalks, mature larvae live in the winter, but also in the corn cobs in winter. Adults have phototaxis, spawning in the leaf stage in spring, and spawning at the heading stage in maize in summer. The newly hatched larvae crawl quickly, and when the sorghum and corn seedlings are small, the victim strains appear dead. In the damaged stems, there are often several to more than 10 larvae feeding on the stalk tissue, and more for the ring foraging. The plants are susceptible to wind-breaking. First, deal with overwintering hosts and reduce the number of insects. Prior to phlegm-removing, the corn and sorghum straw will be used as a raw material for biogas at high temperatures to eliminate overwhelming insect sources. Second, chemical control. 1. Use 25% Guangzhi EC to spray 50 kg of water on the leaf stage per acre. 2. The phoxim poison soil with 0.2% active ingredient is applied to the heart leaves during the sorghum heart leaf stage, which has a good control effect. 3. The use of sorghum drugs should be safe. Dichlorvos and trichlorfon are sensitive to sorghum and are susceptible to phytotoxicity. They cannot be used.
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