Winter pear pears are effective
The pear wood lice are the most important pests on pear trees and occur four to five generations a year. Adults are divided into winter and summer types. Adults of winter type are mainly wintering in the cracks in trunks, and a few of them are overwintering in weeds, leaves and soil. Comprehensive agricultural operations are performed on their overwintering sites, and more than 80% of overwintering adults can be eliminated. Clear Garden: Weeds and deciduous trees are one of the wintering grounds for the pear hibiscus. In the winter, it is necessary to clean the orchard and the surrounding environment in time, thoroughly remove weeds, dead leaves and all wastes, and bury or bury fertilizers, which can effectively reduce the overwintering base number. Scraping: The cracks in the bark are the main wintering sites for pears. Scrape bark can effectively eliminate the overwintering pear wood hoe and reduce the effect of overwintering. When the weather is cold in winter, first lay a layer of plastic film or paperboard under the canopy of the tree, carefully scrape the rough skin on the trunk, collect it and burn it centrally or bury it deeply. Water spray: In the coldest part of winter, use a sprayer to spray water on the trees to make a thin layer of ice on the branches. Then beat or vibrate the branches with sticks to shake the ice off with the scale insects. Winter ploughing: Winter ploughing can not only improve soil physical and chemical properties, create environmental conditions suitable for the growth of pear trees, worsen the conditions in which pear wood mulberry can be used for wintering, but also can uncover the original pear wood mulberry to make it fully exposed. It was frozen in bad weather. Irrigation: Irrigation in winter can increase the moisture content in the soil and raise the temperature of the ground so that the roots of the pear tree will be protected from freezing injury. This is usually done when the temperature falls below 0°C. Irrigation is suitable for seeing water wet on the ground, and can drown winter pears in the soil, effectively reducing the overwintering base number. Pharmacoprotective: After the deciduous pear tree is exposed, there is little activity. At this time, prevention and control can effectively reduce the overwintering adult base number. In general, when the temperature is low in the early morning, spray the spray on the tree body and the ground. The liquid can be used 10% Dagong Chen WP 2000 times, or 0.9% edford 3000 times, or 1.8% Abhat 7501 pesticide 5000 to 6000 times. China Agricultural Network Editor