北京地区番茄叶霉病菌致病性分化新动态

Further Identification of Physiological Races of Tomato Leaf Mould in Beijing

通过对北京地区番茄叶霉病菌生理小种分化的连续监测,发现了可侵染目前生产上主栽抗叶霉病品种的新小种。采用国际上通用的一套叶霉病生理小种鉴别寄主品种,利用苗期接种鉴定的方法,对新小种进行了多次小种归属鉴定,该小种属于1.2.3.4.9。与目前生产上的优势小种1.2.3和1.2.3.4相比,新小种的分化层次高,致病性更强,虽然现在还不是优势小种,但必须引起高度重视。

A new physiological race of leaf mould (Fulvia fulva ( Cooke) Ciferri) 1.2.3.4.9 was detected by continuous investigating and sampling from tomato production in Beijing area for several years. The new race has higher virulence and can attack the popular tomato varieties with the resistance to leaf mould, although it is not dominant race in tomato production up to now. So the tomato breeders have to pay more attention to the new mutation of the fungus.