花生叶斑病田间流行发生规律及其影响因素研究

Studies on the Occurrence Regulation and Meteorological Factors of Peanut Leaf Spot in Yantai

本试验旨在研究明确烟台地区花生叶斑病的田间发生规律及气象影响因素,以期指导田间病害科学防控,为精准防控花生叶斑病、抗病育种等方面提供依据。结果表明,花生褐斑病、黑斑病、网斑病通常分别于7月中旬、7月下旬、8月上中旬开始发病,8月中下旬病害开始快速发展,确定花生叶斑病开始防控关键时期为7月中旬。通过分析花生叶斑病发生与气象因素关系,明确持续高湿为花生叶斑病发生发展提供了有利条件,降雨可增加病害的发生程度,黑斑病适宜于高温条件下发生,网斑病在气温凉爽的气候条件下发生迅速。

The purpose of the trial was to study the occurrence regulation and meteorological factors of peanut leaf spot disease in Yantai,so as to guide the scientific control of the disease in field.The results showed that the beginning date of peanut early leaf spot,black spot and web blotch disease was usually in mid-July,late July and early-mid August,respectively.In mid-and late August,disease began to develop rapidly.It showed that the critical period to control the peanut leaf spot was mid-July.Through the analysis of the relationship between peanut leaf spot disease and meteorological factors,sustained high humidity provided favorable condition for the occurrence of peanut leaf spot disease.Rainfall could increase the occurrence degree of the disease.This study provided the technical basis for conducting accurate prevention and control of peanut leaf spot disease-resistance breeding,etc.