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1.芹菜叶斑(早疫) ①症状 叶片发病时产生黄褐色水浸状4～10毫米大小的圆形或不规则形病斑。茎及叶柄上病斑初为水浸状圆斑或条斑,后变暗褐色,稍凹陷。高温高湿时病斑出现白色霉层,如用水冲或阳光曝晒易消失。 ②药防 苗床消毒,50％多菌灵,每次平方米8克,加拌干细土10公斤,拌匀后施入床内;50％多菌灵500倍液,50％托布津(甲基硫菌灵)500倍液;75％百菌清500倍液;77％可杀得500～800倍液;70％代森锰锌
1. Celery leaf spot (morning sickness) ① symptoms The incidence of leaves when the yellow-brown watery 4 ~ 10 mm in size round or irregular shaped lesions. Stems and petioles at the beginning of the lesion was flooded spots or streaks, after the dark brown, slightly depressed. High temperature and humidity spots white mildew layer, such as water or sunlight easily disappear. ② anti-drug bed disinfection, 50% carbendazim, 8 grams per square meter, add fine dry mix 10 kg, mix well into the bed; 50% carbendazim 500 times, 50% Topaz Thiophanate-methyl) 500 times; 75% chlorothalonil 500 times; 77% can kill 500 to 800 times; 70% Mancozeb