论文部分内容阅读
多雨季节,月季常受到黑斑病危害。叶片、花梗上产生黑色或深褐色圆形病斑,有黄色晕圈,有时几个病斑连在一起,叶片大面积发黄、脱落,不仅影响观赏,严重时还危及存活。为了消灭黑斑病,我尝试了许多办法,如清洗叶片、洒药等,但效果并不理想。有一次,我偶然发现庭院内夹竹桃旁的几盆月季开得艳丽而有神,叶片也光亮清秀。会不会和夹竹桃有关呢?抱着试试看的想法,我立即将有黑斑病的月季搬到夹竹桃旁,1个多月后,黑斑病竟消减了许多。之后我将夹竹桃叶片剪下些许,放入清水中浸泡24小时,再取出捣烂过滤,取其汁液喷洒在患病的月季叶片
In the rainy season, the seasons often suffer from black spot disease. Leaves, pedicels produce black or dark brown round lesions, a yellow halo, and sometimes several lesions together, the leaves of a large area of yellow, off, not only affect the viewing, but also seriously endanger the survival. In order to eliminate melasma, I tried many ways, such as cleaning leaves, sprinkling drugs, but the effect is not satisfactory. On one occasion, I stumbled upon the few pots of rose beside the oleander in the courtyard, which were beautiful and godly, and the leaves were bright and beautiful. Will it be related to oleander? Holding the idea to try, I immediately moved to black apricot next to oleander, more than a month later, the black spots actually reduced a lot. After I cut a little oleander leaves, soaked in water for 24 hours, and then remove the smashed filter, take its juice spray in the leaves of the disease rose