桂花在常年的生长中会受到多种病菌和害虫的侵袭。常见的病与虫的形态及其传播途径,已有多文涉及,此不再做图文赘示,本文着重谈谈它们的危害症状及有效的防治方法。桂花的病害主要有枯斑病、褐斑病(俗称干尖病或叶斑病)。枯斑病是最容易被忽视的病害,多自叶尖或叶缘发病,由叶尖向内横直面延伸或在尖缘连结成不规则块状。病状色泽略淡于下面将谈到的褐斑病,似自然枯叶状,病叶脱落较轻,但发病率高,尤其是春季老叶发生明显,很容易侵染至新发嫩叶。由于枯斑病初发时病状色与自然枯叶色泽接近,因此发生了这种病症之后,多数养护者并不能及时地认出来,还只当是管理不当或受其他条件影响出现的自然现象呢,引不起重视,因而也就得不到及时有效的防治,给病菌继续滋生蔓延以可乘之机,很快侵染全株或多株。 Osmanthus in perennial growth will be a variety of germs and pests. Common disease and insect morphology and the route of transmission, has been involved in many articles, this is no longer illustrated, this article focuses on their harmful symptoms and effective prevention and treatment methods. Osmanthus diseases are mainly spot disease, brown spot disease (commonly known as dry tip or leaf spot disease). Blotch is the most easily overlooked disease, the incidence of more from the leaf tip or leaf margin, extending horizontally from the tip inward or at the tip of the link into an irregular block. Slightly lighter than the pathological symptoms will be mentioned in the brown spot disease, like natural dead leaves, sick leaves shed less light, but the incidence is high, especially in the old spring leaves obvious, it is easy to infiltrate the new leaves. Since the onset of the disease is similar to the natural color of the dead leaves, most caregivers do not recognize them in time and only when they are mismanaged or otherwise affected by natural conditions , Can not afford to pay attention to, and therefore can not get timely and effective prevention and treatment to the bacteria continue to grow and spread with the opportunity to quickly infect whole plants or more strains.