The Explore And Research Of The Integrate Control Technology Of Tobacco Virus Diseases In Panzhihua

Tobacco virus diseases were the most widely happened cause seriously damage in tobacco fields in the world. There are 47 tobacco virus diseases reported now in the world and 17 tobacco virus diseases in China. The identifying result of typical and proper samples in Panzhihua showed that there were 4 types:Tobacco mosaic virus (TMV), Cucumber mosaic virus (CMV), Potato virus Y (PVY), Tobacco etch virus (TEV).In order to definite the cause of tobacco virus disease and control these disease, this study concerned on the surveys of tobacco virus disease occurrence and integrated control technology. The main contents are listed as follows:The main tobacco virus diseases included PVY, TMV and CMV, with mixed occurrence of PVY, TMV, CMV as the most common by detection and surveyed. The occurrence of tobacco virus diseases resulted from several elements. Tobacco aphids are the main vector of tobacco virus diseases in early field development. The fields of continuous cropping or neighboring vegetables, potatoes, melons and fruits might get higher rate of occurrence with serious damages. Besides the tobacco varieties resistant to tobacco virus diseases were too limited.According to the local ecological conditions of Panzhihua, the system of tobacco virus diseases integrated control based on "ecological control and biological control" was build and conducted, including planting resistant varieties, rotation between tobacco and rice, without-disease tobacco seedings, remove the diseased plants, balanced nutrition reasonable fertilization, to avoid aphid, covering film and real-time measures such as spraying, integrated control in more than 82.35 percent. And screened two biological pesticides were better to control tobacco virus diseases. and summed up the control strategy of tobacco virus disease in Panzhihua. Such as Choose the appropriate resistant varieties; the eradication of primary infection source; cut off the route of transmission; cultivate disease-free seedling; supplemented by chemical control and cooperate with the strict agricultural practices. Plant production in tobacco standardized production process, which requires from the nursery to post-harvest have to be strict agricultural practices.Therefore, technology regulations were made for IPM on tobacco virus diseases basing on tobacco production in...