L. lucidula, also known as forage grasshopper, can harm a variety of fruit trees, vegetables, cotton, alfalfa and other economic crops. In 2001, Lumbosacta occurred in a large area in Zhangzhou District, Hebei Province, and seriously damaged the dates, which is rare in history. According to June 16th to 18th (the second generation of Lumbricus occurred in the peak period), Yangzisi, Liuzhuangzi, and other places in the town of Huangdipu in Jingxian County investigated 26 jujube fields, and each tree had an average of 1 Of the 2,688 heads, the highest one was 4032 heads. Jujube and Xianxian districts were all commonly occurring, with an area of ​​nearly 10 million mu. Damage characteristics and law of occurrence 1, morphological characteristics: Lumbricus is a Hemipteran, blind Lycium family. If the body is green, with black fine hair, wing tip black; adult body about 5 mm long, green, pronotum is dark green, there are many small black spots. The base of the forewings is green and the ends are gray. 2, damage characteristics: the nymph and adult suck jujube tree buds, young leaves, buds and young fruit, the first appeared green leaf buds chlorosis spots, with the extension of the leaves, small spots gradually become irregular holes, commonly known as “Breaked leaf madness†and “broken sunroofâ€; after flower bud damage, it stops development, withering and shedding, and all those with heavy flowers lose all of their flats. After the young fruit is damaged, some appear black necrotic spots, and some appear bulging pimple. The pulp tissue is necrotic and most of the affected fruits fall off, seriously affecting the yield. 3. Occurrence pattern: Five generations in one year in this area, wintering in eggs and weeds and shallow soils, March to April in the following year, average temperatures above 10°C, relative humidity up to 70°C, Wintering eggs begin to hatch. The first generation occurred in early May infestation of jujube buds; the second generation occurred in mid-June, and injures jujube and young fruit. It was the heaviest generation of jujube trees. The third, fourth, and fifth generations occurred in mid-July, mid-August, and mid-September, respectively, and the phenomenon of overlapping generations was severe, mainly affecting crops such as legumes and corn. Outbreak causes 1. Wide range of adaptability: The green-lipped cockroach was originally a pest on pasture and cotton, but with the adjustment of agricultural structure, it was transferred to fruit trees, vegetables, and other economic crops. The jujube tree, beans, eggplant, In 2001, melons suffered heavy damage. Some plots even lost production. 2. Appropriate climatic conditions: The occurrence of L. lucidum is closely related to the climatic conditions. The temperature is between 20 and 30C and relative humidity between 80% and 90%. In April 2001, the average temperature was 21°C. On April 29, the rainfall was 25.6 mm. The temperature and humidity were very favorable for the hatching of overwintering eggs, resulting in the peak of the first generation of L. lucidum in mid-May. On the one hand, it directly affects the flower bud differentiation and bud development of jujube trees. On the other hand, it directly damages the buds, causing the buds to fall off and affecting the formation of buds. This is one of the reasons why jujube tree buds were too few last year. On June 13, 14 and 16 of the same year, continuous rainfall in this area, with a rainfall of 35 millimeters, formed the conditions for the occurrence of the second generation of the green plague, together with the first generation of the Lumbricus. The control effect is not ideal, and the population base of insects is large, which in turn leads to the outbreak of the second generation of green-clear ticks. According to statistics, the fruit drop rate reaches 40%, and the severe ones can reach as high as 70%, which reduces the production of jujube by 30% to 60%. 3. The prevention and treatment are not timely: The Lumbricus has been discovered in the district since 1986, but it has not been well controlled. On the one hand, due to the large number of adult Luzons, crawling on the leaves or buds at night or early morning to eat, damage, and crawling quickly after being frightened, coupled with their smaller individuals, body color and leaf color are similar, not easy to find, more It is not worthy of attention; on the other hand, it is due to irregularities, small scales, and failures that have occurred over the years, and it is believed that it does not cause much harm to jujube, which has not caused jujube farmers or even experts to attach great importance, nor has it included the focus of last year. Control object. However, when it was found that the damage was serious to the jujube fruit, the green-lipped cockroach has grown into an adult and has a strong ability to fly. It missed the timing of spraying, and it was difficult to prevent and cure. Prevention and control methods According to the occurrence characteristics of A. lucorum, we must strengthen pest monitoring according to the local climatic conditions, and take comprehensive prevention and control measures. 1. Artificial control: Weeds and sick bodies are completely removed in winter to reduce the amount of overwintering eggs. 2, chemical control: master in all generations of nymphs centralized and unified drug use, the contact agent can be used for strong contact, such as beta-cypermethrin, if combined with systemic drug spray better. The green locust No. 2 spray is best in the early morning or late evening, spraying should be uniform.