西瓜蔓枯病的发病规律是什么？

耕种帮解答：

通常在5-35℃的环境下能够生长和繁殖，但在55℃的温度条件下仅能存活10分钟左右，西瓜蔓枯病最喜欢的是22-26℃的温度以及相对湿度达到85%以上。西瓜蔓枯病以病菌的分生孢子器及子囊壳附着于病部混入土中越冬。来年 rounds when temperature and humidity are suitable, spores are released and spread by wind and rain, causing damage. The surface of seeds can also carry the bacteria. The bacteria mainly invade the watermelon plants through wounds, causing the disease.

西瓜蔓枯病菌主要以分生孢子器或子囊壳随病残体在土壤及粪肥中越冬。翌年riu through wind, rain, and irrigation water, entering through stomata, water pores, and wounds. 西瓜蔓枯病，西瓜病症之一，主要侵染西瓜茎蔓，也侵染叶片和果实。初生 backend water-soaked lesions, which later turn into brown necrotic spots, star-shaped cracks, and internal corky dry rot, slightly blackened and then rotted.

病菌在5～35℃的温度范围内部可侵染为害，20～30℃为发育适宜温度，在55℃温度条件下，10分钟即可死亡。最适发病田间widely in temperature 22~26℃之间，相对湿度85%以上，高温多雨季节发病迅速。连作、灌溉不良、土壤湿度大或偏施氮肥地块易发病。西瓜蔓枯病主要为害瓜蔓、叶片和果实。西瓜整个生育期均可发病，引起叶片、蔓枯死树叶 and fruit rot. Cotyledons are affected, with lesions initially appearing as small water-soaked spots, gradually expanding into yellow-brown or邻里作坊的出Cohen or irregular spots, soon spreading to the entire cotyledon, causing cotyledon death.