小麦赤霉病田间病情与抽穗扬花期气象条件和病粒率关系  

Relationships among field condition of wheat scab and climate and percentage of Fusarium-infected kernels at the heading and flowering stage

作　　者：唐洪[1] 彭恒[1] 刘明龙[1] 杨建华 吴吉林 

机构地区：[1]四川省岳池县植保植检站,四川岳池638300 [2]四川省岳池县裕民镇农技站,638300 [3]四川省岳池县双鄢镇农技站,638300

出　　处：《中国植保导刊》2012年第7期10-12,共3页China Plant Protection

摘　　要：小麦赤霉病在温暖、高湿环境下发病严重。在小麦赤霉病预测预报中,利用小麦抽穗扬花期气象因子,预测小麦赤霉病发生程度,即4月上、中旬雨量(x1)、4月中旬雨日数(x2)与当年小麦赤霉病病情指数(Y1)组建回归预测式:Y1=0.913 1+0.093 5x1+2.460 3x2±2.490 9,及时指导防治工作。通过小麦赤霉病田间病情指数(Y1)、病穗率(x3)与病粒率(Y2)的关系,建立回归预测式:Y2=0.248 2+0.946 9Y1-0.154 1x3±0.344 3,为脱毒处理提供理论依据。Wheat scab often broke out at the condition of warm and high humidity.Based on climate factors at wheat heading and flowering stage,the occurrences of wheat scab were forecasted.And regression equation was established as Y1=0.913 1＋0.093 5x1＋2.460 3x2±2.490 9 with rainfall amount in early and middle of April（x1）,quantity of rainy days in mid-April（x2） and the disease index of the year（Y1）,which was used to guide the disease controlling.And the regression forecast equation： Y2=0.248 2＋0.946 9 Y1-0.154 1x3 ± 0.344 3 was established with the disease index（Y1）,percentage of Fusarium-infected panicle（x3） and percentage of Fusarium-infected kernels（Y2）,which provided theoretical basis for virus-free treatment.

关 键 词：小麦赤霉病 雨量 病情指数 病粒率 

分 类 号：S431[农业科学—农业昆虫与害虫防治]