【摘要】 １９８８～１９９７年对河南开封西瓜病毒病流行规律的研究结果表明，开封西瓜病毒病年度流行程度取决于西瓜苗期（５～６月份）的蚜量和降雨量，二者与西瓜病毒病的流行程度呈直线相关关系，当西瓜苗期降雨量小、蚜量大时，则病毒病发生严重。更多还原

【Abstract】 According to the data collected from 1988 to 1997,watermelon virus disease occurred in Kaifeng,Henan province of China was related to the total quantity of aphides,total precipitation in seedling stage (May and June). A linear model is established including the above two factors.更多还原