复盖作物除了易受虫害及橡胶树根病的侵染外,还会遭受其他多种病害的侵袭,本文即讨论这些病害。必须记住,营养缺乏能引起有类于病害的征状——叶缘焦枯、褐斑、褪绿等,而死亡或破坏的组织又必然招来次生微生物的侵染,因而就可能把次生微生物误认为是造成上述征状的原因。同样,长期的干旱也会使复盖作物落叶和梢枯。因此,假如打算进行 In addition to being susceptible to insect pests and Rhizomania, the covered crops are also affected by many other diseases, which are discussed in this article. It must be remembered that nutritional deficiencies can cause disease-like symptoms such as scorching, brown spots and chlorosis on the leaf margins, and death or destruction of tissues invariably invites secondary microbial invaders and therefore may result in secondary Microbes mistakenly believe that the cause of the above symptoms. Likewise, long-term droughts can also cover crop leaves and shoots. So, if you are going to proceed