竹丛枝病的研究——Ⅲ.病菌的侵染特点和防治试验

竹丛枝病菌(Balansia talce)在病枝内越冬后,翌春在病枝新梢上产生分生。孢子成为初次侵染来源。带病竹母造林经连续多年观察,病、健株鞭系剖析调查、自然发病和人工接种发病新梢,以及剪除病枝连续多年观察结果,认为该病是局部侵染性病害。彻底剪除病枝(株)即不再复发;粉锈宁对症状有一定的抑制作用,四环素等抗生素对症状无防治作用。     

灭幼脲3号防治黄脊竹蝗的常规技术

本文着重介绍了灭幼脲３号防治黄脊竹蝗（Ｃｅｒａｃｒｉｓ Ｋｉａｎｇｓｕ）必须做好的虫情调查；掌握有利的防治时间；选择药物剂型以及药物配制的施药方法常规技术，确保防治效果。本文还介绍了防治黄脊竹蝗效果检查及评估的有关方法。     

小害虫 大危害——外来林业害虫松突圆蚧和湿地松粉蚧

我国是林业外来有害生物入侵危害严重的国家之一,外来林业有害生物不仅造成巨大的直接经济损失,同时也给我国森林生态系统和生物多样性造成极大的破坏。目前我国发生的最严重的10多种森林病虫害中,有一半是外来有害生物造成的,其中松突圆蚧和湿地松粉蚧都属微小型昆虫,是严重威胁我国南方松林的外来有害生物。松突圆蚧松突圆蚧(Hemiberlesiapitysophila)属昆虫纲、同翅目、蚧总科、盾蚧科、突圆蚧属,原产地在日本的冲绳诸岛、先岛诸岛,在国内分布于台湾、香港、澳门、广东和福建。松突圆蚧在日本主要寄生琉球松,但少见松树严重受害的迹象;…     

竹丛枝病的研究——Ⅲ.

After living through tile winter, the conidium produced by the witches’ broom of bamboo had the aid of rainwater to disseminate and infect the growing point of current shoot. Then the current shoot disased or rhizome shoot of the earth’s surface infected, formed discaed plant in sharp of a thick growth of grass. According to survey in many years, We think this disease which results from local infection, it was not systemicly infeeted. Consequently, it is the best way to wipe out the disease twig thoroughly, in another way, it has a better effect to adopt sahzuotong on dieased twig, but it was not any improvement to adopt antibioctic such as tetracline and oxytcrtracyc-line and so on for this disease symptoms.