• Title/Summary/Keyword: Entomosporium leaf spot

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Leaf spot of Amelanchier asiatica Caused by Entomosporium mespili (Entomosporium mespili에 의한 채진목 점무늬병)

  • 신현동;이현태;양성일;이상현
    • Korean Journal Plant Pathology
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    • v.14 no.6
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    • pp.732-734
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    • 1998
  • Leaf spot of Amelanchier asiatica was observed in Korea.. The major symptoms of the disease were small necrotic spots and severe early defoliation. On the basis of morphological characteristics of the fungus observed from naturally infected leaves, the causal organism was identified as Entomosporium mespili (DC. : Duby) Sacc. The conidial suspension prepared from sporulating lesions was sprayed on healthy leaves with or without wounding to prove pathogenicity of the fungus. Small spots were noticed tow days after inoculation, and acervuli containing numerous conidia were observed 7 and 10 days after inoculation from wounded and unwounded leaves, respectively. This is the first record of the disease on A. asiatica in Korea.

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Efficacy of Fungicides for the Control of Leaf Spots on Eriobotrya japonica and Photinia glabra (비파나무 및 홍가시나무 점무늬병의 살균제 방제효과)

  • Seo, Sang-Tae;Shin, Chang-Hoon;Ji, Kwon-Hyeok;Park, So-Young
    • Research in Plant Disease
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    • v.17 no.3
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    • pp.410-412
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    • 2011
  • Since the late 2000s, a serious Entomosporium leaf spot disease, caused by Entomosporium mespili, has been found frequently on leaves of Eriobotrya japonica and Photinia glabra at a nursery station in Goheung and Jeju, respectively. Studies were conducted to select fungicides that would effectively control Entomosporium leaf spot. Among the three fungicides tested, weekly foliar applications of propiconazole and chlorothalonil effectively reduced disease severity on E. japonica and P. glabra showing control value of 64.1% and 87.6%, respectively. Weekly treatments of thiopanate methyl were less effective. Propiconazole controlled the disease, but, it was phytotoxic to P. glabra.

Occurrence of Leaf Spot on Eriobotrya japonica Caused by Entomosporium mespili in Korea (Entomosporium mespili에 의한 비파나무 점무늬병 발생)

  • Seo, Sang-Tae;Park, Mi-Jeong;Shin, Hyeon-Dong;Kim, Kyung-Hee
    • Research in Plant Disease
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    • v.17 no.2
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    • pp.228-231
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    • 2011
  • Since 2008, a new leaf spot disease has been found in loquat tree (Eriobotrya japonica) at a nursery station in Goheung, Korea. Above 50% of the seedlings developed the spot symptoms on the leaves. The infected plants were generally reduced in the seedling vigour and early defoliation was occurred. The infected leaves developed grayish lesion with dark reddish brown margin. The pathogen developed round to ellipsoidal acervuli on the lesion. Based on morphological characteristics of the pathogen, the fungus was identified as Entomosporium mespili. The cultured pathogen successfully reproduced the same disease symptom on the leaves of loquat tree and found to be E. mespili. A monoconidial culture was deposited in Korean Agricultural Culture Collection (KACC 44727). This is the first report of E. mespili causing leaf spot of loquat tree in Korea.