论文部分内容阅读
为解决西瓜连作死苗死秧问题,根据我国西瓜主要病虫种类,通过室内毒力测定、田间小区和大面积示范试验,研制出药肥复合型种衣剂9号和10号。经测定,包衣西瓜种子的安全有效用量为每100克种子需有效物0.3-0.5克。两种制剂均可防治连作田主要病害(西瓜苗期猝倒病、立枯病、炭疽病和苗期枯萎病等)。防病保苗效果为61-90％。种衣剂10号还能兼治苗期地下害虫(蝼蛄、地老虎)防效在69-81％,特别是防治传毒蚜虫,使病毒病发病株率降到0.56％以下,相对防效在94％以上。对解决夏播西瓜病毒病发生重的问题作用显著。此外,西瓜种子包衣可促进植株生育,大瓜率增加,增产13—14％。
In order to solve the problem of dead seedling and dead seedling in watermelon, according to the main pests and diseases of watermelon in our country, we developed the compound fertilizer 9 and 10 by the indoor toxicity test, field plot and large area demonstration experiment. It has been determined that the safe and effective amount of coated watermelon seeds is 0.3-0.5 grams of effective substance per 100 grams of seeds. Two kinds of preparations can control even the main crop diseases (watermelon seedling damping-off disease, blight, anthracnose and seedling wilt, etc.). Disease prevention seedlings effect of 61-90%. Seed coating No. 10 also can be both seedling stage underground pests (蝼 蛄, to the tiger) control effect in 69-81%, especially the prevention and control of poisoning aphids, the incidence of virus disease decreased to 0.56% or less, the relative control effect at 94 %the above. To solve the summer sowing watermelon virus disease is a serious problem. In addition, watermelon seed coating can promote plant growth, the rate of large melon increase, yield 13-14%.