论文部分内容阅读
几年以来,我们领导学生在园地栽培番茄,都遭到了失败,原因是番茄的青枯病烂根病的危害。1956年种了一大幅一千株左右,结果百分之九十的在刚结果象杏子大时青枯病烂根病陆续发生,尽管用石灰、草木灰、拔烧病株等积极措施,枉费心机,无法防治而死去,全部无收成。根据我们调查了解分析,在学校沙质土中这些细菌孢子很多;另一方面种子消毒不严(种于是商贩手里买来的)所引起的。1957年我们针对上年失败教训,先将土壤消毒(砒、河湿性六六六粉),种子已经过处理,在生长期中经常用波尔多液喷射,
For several years, we have led our students to cultivate tomatoes in the garden and have failed because of the damage caused by rotten roots of tomato plants. In 1956, about one thousand plants were planted with a result of about 90%. As a result, the results showed that the root blight of the wilt occurred one after another when the apricot was large. Despite the positive measures such as using lime, ash, , Can not prevent and die, all without harvest. According to our investigation and analysis, the spores are abundant in the sandy soil of the school; on the other hand, the seed is not sterilized and the seeds are bought by the traders. In 1957, for the lesson of last year’s failure, we first disinfected the soil (砒, wet six six six powder), seeds have been processed, often in the growing season with Bordeaux mixture jet,