| Sphaerotheca phaseoli에 의한 녹두 흰가루병 발생 |
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이상엽, 황순진, 이상범 |
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| Occurrence of Powdery Mildew on Mung bean (Vigna radiatus L.) Caused by Sphaerotheca phaseoli |
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Sang Yeob Lee, Soon Jin Hwang, Sang Bum Lee |
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| Abstract |
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Powdery mildew of mung bean was found in Suwon on September 2000. Many white and powdery mycelial colonies appeared on leaves of the plants. Conidia with fibrosin bodies were ellipsoid to elongate-ellipsoid, 25~38×16~22 mm in size and formed in chains. Conidiophores were erect on superfical mycelium, 67~100 mm in length. Foot cells were cylindric with 37~65×10~11 mm in size. Appressoria were indisdinct. Germ tubes from conidia were simple, not branched. Dark brown cleistothecia were observed on the leaves of mung bean. Cleistothecia were globose or subglobose, 85~1130 mm in size. Wall cells were irregularly polygonal with 15~45×7~26 mm. Appendages were mycelioid, 6-11 per ascocarp, coloured, throught when mature or paler upwards, 1~7 septa, 192~223×5~7 mm in size. A single ascus had in a cleistothecium and was ovoid or subglobose with 62~95×50~67 mm in size. Ascusspore had 8 spores in an ascus and rarely developed, mostly immatured ellipsoid- ovoid with 16~24×12~16 mm. On the basis of morphological characters of the conidial stage and teleomorph, the fungus was identified as Sphaerotheca phaseoli. |
| Key Words:
Mung bean, Powdery mildew, Sphaerotheca phaseoli, Vigna radiatus |
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