Aphis gossypii Glover (Cotton aphid) is a member of the order Homoptera, Polygonidae, and commonly known as honey insects and oil bugs. It is a worldwide pest and has serious damage in drought years. The main damage is watermelon, melon, cucumber and other cucurbit crops. The wingless females are 15 to 1.9 mm in length, yellow-green in summer, and dark green in spring and autumn. The abdomen is tubular and has a pattern. The tail piece is black, with 4 to 7 bristles. The winged female is 12 to 1.9 mm long, yellow or light green. The pronotum is black and has 3 to 4 pairs of dark spots on the back. Abdominal tube and tail piece with the same female without wings. If the pheasant has no wings, body length 1.63 mm, summer yellow or yellow-green, spring, autumn blue gray, compound eye red. If there are wings, the autumn is grayish yellow, the latter half is black, and the others are wingless. Living habits occur 20 to 30 times a year. It is also possible to overwinter in the stems of hibiscus, pomegranate, buckthorn and other branches of hibiscus, pomegranate, buckthorn, and so on. In mid-March, when the average temperature on the 5th day was stable above 6°C, the overwintering eggs began to hatch as dry mothers, and at the end of April, the winged pelican migrated to the open ground. In the late autumn and early winter, winged plovers migrated to the protected area and they spawned for winter mating. The best temperature for breeding is 16～22°C. The arid climate is suitable for the occurrence of melons. Generally, chemical fertilizers are often chased with lots of nitrogen, and the nitrogen content is high. In the open field planting, it is generally close to the wintering ground of the melons and wintering the host plants, and the melon fields near the protected areas are heavy and the winds are heavy. Intercropping with rapeseed field, from April to May, the yellow rapeseed petals can play a role in attracting mussels, or the nursery of melons is close to the rapeseed field. ?? Prevention methods 1. Agricultural control The selection of insect-resistant varieties with leafy hairs and early sowing can eradicate weeds at the fields such as Tanabe, Gobi, and Tang, and eliminate some of the sources of mantle. Timely treatment of old yellow leaves and stubble after harvest, clean the pastoral. 2. Physical control uses silver foil to avoid blemishes, covering or hanging strips. It can also play a role in preventing viral diseases. 3, biological control and protection of natural enemies, such as various spiders, ladybugs, grasshoppers, food flies, stings bees and so on. 4, chemical control can be used 10% imidacloprid wettable powder 25 grams per acre water spray or 20% cypermethrin EC, or 2.5% deltamethrin EC, or 2.5% kungfu EC (trifluthrin) ) 3000 times spray; or 40% chrysanthemum cream 2000 to 3000 times, or 2.5 rattan fine cream 600 to 800 times, or tobacco water 1:30 to 40 spray. Pay attention to the use of different types of drugs. Spray should pay attention to the nozzle on the back of the leaf, the liquid spray as much as possible on the melon body. ?? Cucumber planted in a smoke-protected area can be smoked by using an agent. Such as killing flue-cured tobacco, with 400-500 grams per 667 square meters, scattered into 4-5 heaps, ignited with dark fire, closed for 3 hours after smoking, can also be used 22% dichlorvos smoke agent or 10% kill quail Smoke agent fumigation, with 300 to 500 grams per 667 square meters, or 300 to 400 grams per 667 square meters of 80% dichlorvos EC mixed with sawdust, point dark fire smoked. ?? Spraying can be sprayed with 1% antimony dust or 0.5% antimony dust, spraying 1000 grams per 667 square meters each time, no water when the control, 2 to 3 minutes that is sprayed, can be sprayed in the morning or evening, every 10 One day spray, even spray 2 to 3 times. Mobile Radiology Systems And Solutions Mobile X Ray,Cabin Spiral CT,Cabin Xray Diagnose,Radiography Equipment CT MinFound Medical Systems Co., Ltd , https://www.minfoundmed.com
?? Harmful features? Adults and nymphs suck sap on the shoots and shoots. After the young leaves and growth points of Guamiao were damaged, the leaves curled and the melon seedlings grew slowly and wilted. Even the plants withered and died earlier. The old leaves suffered damage and fell prematurely in advance, shortening the period of fruiting and reducing the yield. In addition, it can spread the virus Bo?
? Morphological characteristics?