CiLi Continuous Cropping Tobacco Plant Diseases And I Nsect Pests Occurrence

Along with our country south north smoke continues, in general, the production of high quality for the most part the most popular with the industrial enterprises of tobacco from or high-altitude plateau mountain area. The purpose of this study was to regulation of tobacco plant diseases and insect pests in the mountain area are studied, from the deep understanding of mountain region epidemic regularity of tobacco plant diseases and insect pests. In this paper, the CiLi county mountain region in2008-2008, the three common diseases and insect pests of disease four worm(tobacco mosaic virus black shank disease, Tobacco brown spot, Myzus persica, black cutworm,, Tobacco budworm, Prodenia litura), Main results for this study are as follows:1Three diseases (Mosaic black shank disease red star disease) from2008to2012, five years.Although tobacco Mosaic CiLi smoke zone has adopted a series of cultivation management and chemical control measures, but the onset of tobacco Mosaic plant leaf rate and disease index or presents the increasing trend.Tobacco black shank disease prevention and control measures to make the dangers of tobacco black shank disease have a certain control, but the harm degree is increasing trend, especially system to observe the nursery in2012strains of leaf tobacco black shank disease rate of16.7%, in the production of large area severe high block of tobacco black shank disease incidence rate of plant leaf and disease index rose to10.4%and7.45respectively.The dangers of tobacco red star disease tobacco red star disease degree is a trend of increase, especially in2012CiLi tobacco smoke zone red star disease serious high incidence rate of21.3%disease index was11.2, the onset of smoke zone area of55.4%, loss of about1.5%.2four pests (2008to2012)Smoke tobacco aphid from five aphid occurrence, smoke is on the rise in the number of aphid, although in2012than in2011has greatly reduced, this is because in November2011to start corresponding preventive measures are taken, thus reducing the base of tobacco aphid, but than in2010, a significantly increase in the number of the aphid lure, increased by13.66.Black cutworm wintering base5years respectively2012and3only, there is a black cutworm wintering base increasing trend, for its first moth, and has the trend of the early peak particularly in2010and2012,2008peak early trend year by year.Smoke CiLi area smoke cigarette lighter, nutritional damage mainly because the smaller CiLi smoke zone as the mountain region, altitude is higher, the cold winter weather, smoke hard winter, nutritional so over the years CiLi smoke zone of wintering nutritional base is small, small number, harm to light.The moth CiLi smoke zone for mountain area high above sea level, the cold winter weather, the moth hard winter, the damage is not apparent twill journey noctua pests, moved once encountered the moth fly number, and appropriate environmental conditions may outbreak, cause a great loss.