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砂仁是我国著名南药之一。砂仁叶枯病是一种新近描述的导致植株枯萎和大量减产的严重病害。症状有叶枯型、斑枯型、星斑型和叶鞘病斑四种。据病原菌形态、培养性状、致病性和奇主范围,鉴定为围小丛壳菌(Glomerella cingulata(Stonem.)Spauld.et Schrenk),分生孢子阶段为盘长孢状刺盘孢(Colletotrichum gloeosporioides(Penz.)Sacc.)。病菌在马铃薯葡萄糖琼脂(PDA)培养基上生长较好,而燕麦(OMA)和葡萄糖酵母膏(DYEA)培养基上较有利于产孢。连续日光灯和试验室散光处理促进孢子形成,而紫外灯照射则抑制孢子产生。分生孢子可以串生方式产生。在供试的23科39种植物中,有9科15种植物发病。该菌田间存活期长达16个月以上。
Amomum is one of the famous southern medicine. Amorpha fruticosa is a newly described serious disease that causes plant wilt and mass production. Symptoms are leaf blight type, spot type, star-type and leaf sheath lesions four. According to the morphology, culture characters, pathogenicity and prevalence of pathogen, it was identified as Glomerella cingulata (Stonem.) Spauld.et Schrenk. The conidial stage was Colletotrichum gloeosporioides (Penz.) Sacc.). Germs grew well on potato dextrose agar (PDA) medium, while sporulation was more favorable on oat (OMA) and dextrose yeast extract (DYEA) medium. Continuous fluorescent and laboratory astigmatism promote sporulation, while UV light irradiation inhibits sporulation. Conidia can be produced in series. Of the 23 families and 39 species tested, 15 families of 9 families were affected. The field survival of the bacteria up to 16 months or more.