2012年上海市小麦赤霉病局部重发原因研究

Analysis on heavy occurrence of wheat scab in some areas of Shanghai suburbs in 2012

结合历史调查资料,分析研究了2012年沪郊小麦赤霉病发病特点以及流行程度加重的原因。2012年上海市发生小麦赤霉病面积约5.26万hm^2,平均发病株率为14.73%,局部严重流行,田块发病株率达40%以上。其流行程度加重的原因与感病生育期暖湿天气偏多、主栽品种抗病性下降、无特效药剂和农户忽视防治等因素有关。据此提出了综合防治措施。

On the basis of analyzing the historical survey data, tlae increasingly heavy wheat scao occurring in some areas of Shanghai suburbs in 2012 was investigated in terms of disease situation and predisposing causes. The results showed that the disease occurred in about 52 600 hm2 area,in which the incidence of diseased plants was averagely 14.73% and over 40% in some plots. The increasingly heavy disease was related to such factors as slightly long warm and wet weather at the growth period, weak disease resistance of leading varieties, no specific pesticides and farmers＇ overlooking the control. Accordingly, some integrated control measures were put forward.