浙江省大、小麦致病腐霉的研究

PATHOGENIC PYTHIUM SPECIES FROM WHEAT AND BARLEY IN ZHEJIANG PROVINCE

1989年11月～1990年3月,从浙江省不同地区的大麦(浙农大5号)、小麦(浙麦3号)以及麦田土壤中,分离鉴定到Pythium.dissotocum,P.irregulare,P.polypapillatum(国内新记录),P.spinosum和P.ultimum等5种腐霉。接种试验表明,分离到的5种腐霉对供试大、小麦都能致病,引起根腐、根尖变褐和坏死、第一片叶卷曲,抑制植株生长,造成植株各部不同程度的矮化和变短。

Five species of Pythium were isolated from diseased roots of wheat, barley and wheat - field soils at different locations in Zhejiang Province from November of 1989 to March of 1990. They are : P.d issotocum ,P . irregulare,P. polypapillatum , P.spinosum and P.ulti-mum. In inoculation tests, all five species isolated from wheat and barley roots were pathogenic to their hosts .which caused root rot, root tip browning and necrosis,distor-ture of the first true leaves , suppression of plant growth and various stunting as well as shortening of different parts of plant.