The aphids that harm rapeseed mainly include three kinds of radish, peach, and cabbage, which are often mixed. Adults and nymphs are clustered in the seedlings, young leaves, tender stems and leaves of the ground. Many locusts are seen on the back of the leaf. Timely pesticide control is necessary. Aphids have strong fertility and large feeding capacity, which can cause a large loss of water in the leaves of rapeseed, malnutrition, slow growth, curled and curled leaves, mottled or yellowed leaves. These three species of aphids can also transmit a variety of viruses, such as turnip mosaic virus, cucumber mosaic virus, and tobacco mosaic virus, to cause viral diseases. For the control of aphids on rapeseed, acetamiprid, pymetrozine, nitenpyram, butyl thiocarbamate, thiamethoxam, thiacloprid, deltamethrin, anti-carbazone and the like can be used. Some readers have reported that the use of the insecticides pymetrozine, butyl thiocarbazone, acetamiprid, thiacloprid and other drugs to control aphids is not good, which may be related to improper application methods such as insufficient dosage and uneven application. . In addition, the rapeseed seedling stage aphids are mainly clustered in the back of the leaf, and the focus on the spray on the back of the leaf is beneficial to improve the control effect. Newstar Hardware Co.,Ltd is a professional manufacturer in Tool Set kit, Tool Kit with different kinds of package. Tool bag, Tool Set Box mechanic, Electrician tool bag etc. Bags are made from Jiangsu and Zhejiang province in China, high quality with very competitive price. With high quality tools and quick production and assembly lines in factory, we offer customers very reliable products and lead time as well. Garden Tool Bag,Tool Set Box Mechanic,Electrician Tool Bag,Car Tool Bag SUZHOU NEWSTAR HARDWARE CO.,LTD. , https://www.sjnewstarhardware.com
According to researcher Bai Lixin of the Economic Crop Pest Group of the Institute of Plant Protection of Jiangsu Academy of Agricultural Sciences, the temperature in the Su, Qi and other places was relatively high, and there was not much rain. The rapeseed plants grew green and were conducive to the occurrence of aphids. Some fields may have a large number of aphids. . For rapeseed fields with large amounts of aphids, timely use should be taken to reduce the wintering base and reduce the occurrence of aphids in the coming year. In December, the temperature began to drop, and the locusts entered the wintering state. There was no harm in the field. Generally, no medication was needed. According to the China Pesticide Network , there has been a strong cooling weather recently, and low temperature has an inhibitory effect on the occurrence of aphids. After the low temperature, it can be determined according to the amount of field sputum. The field with a small amount of sputum can be used without drugs, and the field with large amount of sputum can be properly treated with drugs.