In the process of crop production, it is often threatened by a variety of diseases and insect pests, some of which harm the roots, some of which harm the branches, and some of which harm the leaves. Leaf-eating pests are relatively easy to find, and after eating leaves, they often form holes, lack of carvings or white stripes, and the entire leaf is eaten by serious diseases, which is easier to control than root and moth-eating branch pests. Coriander is an insect of the Coleoptera family, which feeds on potatoes, peanuts, beans, peppers, tomatoes, sugar beets and other crops as adults, and can also eat trees such as white-flowered paulownia leaves and disease-free cotyledons; the larvae are parasitic carnivorous insects, specializing in eating the eggs of locusts. Today, we mainly introduce the characteristics of coriander and prevention and control measures, for reference only.
<h1 class="pgc-h-arrow-right" data-track="2" >1, coriander occurrence characteristics</h1>
Coriander is commonly known as the cantharid and chicken cockworm, a very tasty, active insect, and sometimes mistaken for a firefly. There are many types of coriander, including red-headed coriander, coriander, flat carob coriander, short-winged coriander, cantharis, etc., adult insects bite the leaves as a pest, like to gather on the branches to eat young leaves and flowers, light appear holes, lack of carving, serious become light rods, the victim crops grow poorly, serious plants will die, bring about a certain impact on yield and quality.
Coriander occurs in one more generation in the north and 2 generations in the south. Adults are nocturnal, lively and crawling, can fly short distances, have suspended death, quickly disperse or fall to the ground after being disturbed, and can secrete spicy yellow liquid cantharidin from the end of the leg node, in order to scare off predators. Cantharidin is very toxic, can stimulate the cell tissue of animals, if people are sprayed after the skin is red and swollen ulcers, a large blister, the pain is unbearable. Adults lay eggs about 5 cm in the soil, 70-150 eggs per hole. The hatched larvae feed on locust eggs, and a coriander larvae can eat 60-120 locust eggs in its lifetime. Therefore, in areas with more locusts, coriander occurs more, and the treatment of locusts can also be useduliflower.
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In terms of prevention and treatment, we should achieve appropriate prevention and control and scientific use of drugs. In terms of specific measures, we should do a good job in combining agricultural measures with chemical control.
(1) Pharmaceutical control: When the occurrence of coriander in potato, peanut and other crop fields is more serious, foliar spray control can be carried out using high-efficiency cypermethrin, dimethoate, thiamethoxine and high-efficiency cypermethrin. Pay attention to timely and early treatment, rotate medications, and reduce pesticide use.
(2) Artificial killing: Adult insects can also be used to gather on the branches and leaves during the day to kill, reduce the density of the field insect mouth, but pay attention to avoid contact with the skin.
(3) Agricultural control: deep ploughing of the land in winter can expose the overwintering larvae to the soil surface and freeze to death or be eaten by natural enemies, reducing the base of insect sources in the following year.
Special note: Coriander has become an important medicinal insect because it contains a unique medicinal ingredient of cantharidin. Cantharidin can be used in medicine, mainly from coriander, coriander and other coriander extracted, the most famous coriander is Spanish (green) coriander.
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