论文部分内容阅读
侵染新疆哈密瓜的病毒种类有西瓜花叶病毒、黄瓜花叶病毒、南瓜花叶病毒及烟草坏死病毒。1980—1985年,在田间试验及室内研究中,规察了影响病害流行的各种因子。初步认为,5—6月旬平均气温达25℃左右,月平均气温达20℃以上,相对湿度在30—50％时,田间开始出现中心病株,随麦二叉蚜、桃蚜迁飞高峰后,发病率出现明显的流行陡度。持续25—30℃的日平均温度,半月之内造成大流行。对70个哈密瓜品种的试验观察没有免疫品种。这期早播或播时铺上塑料地膜或银色反光薄膜可以大大阻止病害流行,而黄瓜、西葫芦等蔬菜作物与哈密瓜邻作,可促使病害早期发生。本文讨论了影响发病及流行的各种因素,流行前期进行予测,为病害的有效防治提供了依据。
Infected Xinjiang Hami melon virus categories are watermelon mosaic virus , cucumber mosaic virus , pumpkin mosaic virus and tobacco necrosis virus . From 1980 to 1985, various factors affecting the epidemic of diseases were examined in field trials and laboratory studies. It is initially believed that the average temperature in May-June is about 25 ℃, the monthly average temperature is above 20 ℃ and the relative humidity is 30-50% After the incidence of significant steepness of the epidemic. Continuous 25-30 ℃ daily average temperature, causing a pandemic within half a month. Test on 70 cantaloupe varieties No immunization. Sowing or sowing this period when plastic or silver plastic film covered reflective film can greatly prevent the epidemic, and cucumber, zucchini and other vegetable crops and cantaloupe adjacent, can promote disease early. This article discusses the various factors that affect the incidence and prevalence, pre-epidemic to predict, provide a basis for the effective prevention and treatment of diseases.