The main culprit of soybean "sickness syndrome" has found a solution

Soybean planting area in Huaibei District this year is nearly 1 million mu, slightly less than last year. The sowing date is on June 17-23, and Liuqiao, Tunxi and other places are also planted on July 1. Now in 4-6 leafy leaves, some have already blossomed, and generally grow better. It has been observed that since the ban on burning straw in Huaibei area, soybeans have different degrees of "greenness" every year, that is, the flowers in the early stage are not real, and the pods in the late stage are not real, and there are pods and no grains. According to our investigation, the main point is that the bee scorpion is the culprit, and the bee mites, leaf mites, hummers, blind mites, and pea pods are harmful to the accomplices.

Hazard Symptoms: Adults and nymphs often suck body (soy) body fluids while blocking the delivery of nutrients. In the early stage of soybean solidification, it is often caused by clustering, which causes the early buds and flowers of the soybeans to fall off. The fruit pods are not strong, and the fruit is not bulged. There are pods and no granules. In severe cases, the plants are mad, and the second buds bloom, and some even The plant died and died.

According to our recent investigations in Tiefo Town, Liuqiao Town, and Baishan Town of Tunxi County in Luxi County, eggs, nymphs and adults have not been found.

Prevention and control opinions: In order to ensure a bumper harvest of soybeans this year, it is recommended to spray and control the soybeans at the initial flowering stage, and prevent them for 2 times at intervals of 5-7 days. In the evening from 16 to 17 o'clock, use 1000-1500 times liquid 50% phoxim emulsifiable concentrate or 2000 times liquid 5% beta-cypermethrin emulsifiable concentrate + 4000 times liquid 10% imidacloprid wettable powder or 2500-5000 times liquid 25% thiamethoxam , or 5000 times the solution of 3% avermectin EC + 3000 times solution 5% acetamiprid emulsifiable concentrate, or 40% speed emulsified emulsifiable oil 1500 times solution, 48% lesbian emulsifiable concentrate 1000 times solution. 40 to 50 kg of liquid medicine is used for the whole plant spray control. Because the spotted bee has a migratory character, it must be sprayed 2 or 3 times. When spraying, it is necessary to do not spray or spray.

It is the most serious pest of the bean crops. It mainly harms soybeans by sucking stems, leaves, flowers and pods. The mildew is increased, but the plants are not well-grown and the seeds are not full. There are pods without grain. The incidence of insect pests on soybean crops is close to 90%, causing severe soybean yield reduction and quality decline. Therefore, it is important to recognize the hazards of the bee stings and prevent the bee stings.

The point of the bee sting is a kind of scorpion (scented scorpion), belonging to the genus Hemiptera. Alias ​​white striped bee 蝽, bean edge 蝽 elephant. Originally living in the tropics, it is now distributed throughout the country. Point bee 蝽 host: mainly harmful soybeans, broad beans, peas, kidney beans, mung beans, cowpeas, Kunming spatholobus, hairy beans and other legumes, but also harmful rice, wheat, sorghum, corn, sweet potatoes, cotton, sugar cane, loofah, etc. .

Adult body characteristics: body length of about 14 to 16 mm, width of about 3.3 to 4.4 mm, light yellow brown or dark brown, the body is covered with fine hair. Compound eyes, the head is triangular. The first section of the tentacles is longer than the second section. The ends of the first, second and third sections are slightly enlarged, the base half is light, and the base of the fourth section is lighter.å–™ The natural state can reach the midfoot internode. Yellow spotted smooth markings on both sides of the head and chest. The front chest plate and the chest plate can be seen with irregular point-like distribution of black particles. The front chest is inclined forward with the front leaf of the back plate, the front edge has a collar, and the back edge is visible with two bends. The small scutellum is triangular. The front wing membrane is light tan, slightly longer than the abdomen. The abdomen is exposed outside the wings and is arranged in yellow and black. The four feet are the same color as the body. The middle part of the sacral section is slightly lighter than the outer end. The hind foot has a yellow spot. The leg section is thicker than the forefoot. Several small teeth and four long thorns are visible on the abdomen surface. The shape of the hind foot is curved toward the back. . Many small black spots are visible under the abdomen, which are irregularly distributed.

Egg characteristics: about 1.2 mm long and about 1.1 mm wide. The single egg is in the shape of a half egg, and the multi-adhesive surface is fan-shaped, the upper surface is smooth, and a horizontal strip is connected in the middle.

Nymph characteristics: 1 to 4 years old worms are similar to ants, 5th instar nymphs are like adults, but their wings are not full. The length of nymphs of each age is 2.7 to 3.4 mm for 1 year old, 4.4 to 4.8 mm for 2nd instar, 6.7 to 8.5 mm for 3rd instar, 9.8 to 11.4 mm for 4th instar, and 12.6 to 14.1 mm for 5th instar.

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