• The Plant Pathology Journal
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• 제19권3호
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• pp.181-183
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• 2003

Corky root symptoms caused by Pyrenochaeta lycopersici were observed on the roots and stem base of tomato plants in Korea. Symptoms on infected plants typically appeared as stunting and generally lacking vigor, and infected plants die back from the foliage tips after fruits have set. Brown lesions appearing with bands around the roots were characteristic symptoms of the disease. The lesions become swollen and cracked along the length of the root with corky appearance. Based on cultural and morphological characteristics, the fungus from the diseased plants was identified as Pyrenochaeta lycopersici. Pycnidia were solitary, globose to subglobose, brown to black, darker around the neck region, and measured 173-215 $\mu\textrm{m}$ in diameter with septate setae up to 102-132$\times$6.5 $\mu\textrm{m}$. Conidia were hyaline, unicellular, and 4.2-4.7$\times$l.5-2.0 $\mu\textrm{m}$ long. Optimum temperature for mycelial growth of the p. lycopersici isolates ranged from $20^{\circ}C$ to $25^{\circ}C$. Fifteen isolates off lycopersici were tested for pathogenicity to susceptible and tolerant cultivars of tomato plants by artificial inoculation. Three isolates of P. lycopersici induced typical corky root discoloration on susceptible tomato cultivars but not on tolerant tomato. This is the Erst report in Korea of tomato corky root disease caused by P. lycopersici.

• The Plant Pathology Journal
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• 제17권6호
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• pp.382.1-382
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• 2001

• 식물병연구
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• 제25권4호
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• pp.237-242
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• 2019

상추 시설재배지에서 해바라기침선충(Paratylenchus projectus)에 의한 피해가 발생하였다. 피해발생 시설에서 약 3개월 정도 상추를 재배하고 있었는데 상품성이 있는 상추는 전혀 생산되지 않았다. 피해 상추는 잔뿌리가 거의 없었고 굵은 뿌리는 푸석하게 부풀어 코르크화 현상이 발생했었다. 본 시설하우스에서 발견된 침선충 밀도는 토양 100 ㎤ 당 평균 3,296마리(320-11,600)로 매우 높았고 본 시설하우스의 흙을 사용하여 상추를 정식하여 실험한 결과, P. projectus 접종구에서 30% 정도 상추 생육의 저하가 발생하였다. 따라서 이 증상을 해바라기 침선충(P. projectus)에 의한 "상추 뿌리 코르크병"으로 명명하고자한다.