菊花叶枯病是菊花扦插及菊苗生长过程中常见的一种症状,若不及时有效地防治,将造成叶片卷缩、枯萎,甚至全株死亡,危害较为严重。笔者就扦插菊症状特点、发病规律及其防治,简述如下: 症状特点:这是一类维管束病害,病原菌主要寄存于植物的输导组织中,初期侵染量少,症状不明显,常在扦插生长后期引起菊花凋萎死亡。发病规律:叶枯线虫由气孔侵入,通过根系和蒸腾吸水向叶片、叶芽、花蕾、生长部位扩散。防治措施 (1)扦插菊的扦插基质选取时,应尽量避免使用菜园地,因常种植薯类、茄类、十字花科蔬菜 Chrysanthemum leaf blight is a common symptom in the process of chrysanthemum cuttage and chrysanthemum growth. If it is not effectively controlled in time, it will cause the leaves to curl, wilt or even die, which is more serious. The author on the characteristics of cuttings chrysanthemum symptom, the incidence of law and prevention, summarized as follows: Symptoms: This is a type of vascular bundle disease, pathogenic bacteria are mainly stored in the plant’s lead tissue, the initial infection less, the symptoms are not obvious, often Chrysanthemum wilt died during the later period of cutting growth. Pathogenesis: Bacillus thompson invasion by the stomata, through the roots and transpiration of water to the leaves, leaf buds, buds, growth parts of the proliferation. Control measures (1) cutting chrysanthemum cutting matrix selection, should try to avoid the use of vegetable garden, often planted potato, eggplant, cruciferous vegetables