一、发生概况 花生青枯病(Pscudomonas solanacearun)俗称“死藤”“暗枝”。病菌从根部侵害,使维管束腐败变褐,逐渐向茎部扩展,横切病部有时有污浊的乳状物溢出;在油镜下可见带1—3根鞭毛的秆状细菌。植株被害初期地上部没有明显病状,后期由于根茎导管被严重破坏,分枝迅速失水雕萎,最后整株干枯死亡。枯死病株最早见于4月上、中旬,一般年份春花生出现三次枯死高峰:第一次是4月下旬至5月初,开花期间;第二次是5月中旬结莢盛期;第三次是6月初结莢后期,其中以前两峰最甚。秋花生多在9月,旱季以后才出现枯死病株,9月中、下旬到达高峰。 First, the occurrence of peanut bacterial wilt (Pscudomonas solanacearun) commonly known as “dead vine” “dark branches.” Pathogenic bacteria from the roots, so that the vascular bundle brown hair, and gradually extended to the stem, sometimes cross-cutting disease milky milky spill; visible in the oil microscopy with 1-3 flagella stalk bacteria. Early plant damage was no apparent pathogen, the late due to severe damage to the rhizome conduit, branch quickly withering wilt, the last whole plant died. The dead plants first appeared in April and the middle of the year. In the middle of spring, peanut peaked three times in the general year. The first was from late April to early May, during the flowering period; the second was the mid-pod peak in mid-May; the third was The late pod in early June, of which the previous two peaks is the worst. Autumn peanut and more in September, dry season appeared after the dead strain, September, late peak.