论文部分内容阅读
螺类既然是寄生虫的中间宿主,又危害稻根;且生殖力很强,如果不设法消灭,稻田皮炎会愈来愈严重。消灭的方法虽然不同,但以最有效而化钱最少为原则。我们仅以下面的三种来讨论:一、666粉用666粉在实验室内实验的结果,认为很不错,在野外使用666粉也有效力。当
Since the snail is an intermediate host of parasites, but also endanger the rice roots; and fertility is very strong, if you do not try to eliminate, paddy dermatitis will be more serious. Although the elimination of the different methods, but at least the principle of the most effective and money. We only to the following three to discuss: A, 666 powder with 666 powder in the laboratory experiment results, that is very good, the 666 powder in the field also effective. when