Leafhopper commonly known as red spider, will affect the corn grouting process, resulting in a decrease in grain weight, resulting in reduced production. Into a body oval shape, body color red or rust red. The eggs are spherical and smooth on the surface. The eggs laid at the beginning are colorless and transparent. They gradually turn orange-red, and red eyes appear before hatching. The newly hatched larvae are round in shape and have a transparent body or yellowish color, and their body color changes to light green after feeding. The larvae become nymphs after being molted into skin. The body shape is elliptical, the body color turns red from orange red, and spots on both sides of the back are obvious. Over 10 generations took place throughout the year, alternating from generation to generation. Since the body of the worm is tiny, it is more likely to feed on the back of the leaf and it is not easy to be found in the field. Prevention and treatment of leafhoppers can take the following methods: (1) Strengthen the investigation and find that if leafhoppers are harmful, timely remove 1-3 pieces of scorpion (egg) leaves from the base of the corn to control the damage. The extracted leaves must be taken out of the field and buried or burnt. . 2 Use blue and yellow plates to induce enamel, that is, apply blue and yellow colors to cardboard (45 cm in length and 27 cm in width), then apply a layer of butter, use 9 pieces of mu, place it flat or stand. Between rows of corn. 3 It can also be sprayed with 10% imidacloprid wettable powder 1000-1500 times, or 1.8% abamectin 4000 times.
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