|Title:||蝴蝶蘭鐮胞菌病害調查||Other Titles:||Field surveys for Fusarium diseases of Phalaenopsis in Taiwan||Authors:||蘇俊峯
Su, J. F.
Lee, Y. C.
Chen, C. W.
Huang, J. H.
Hsieh, T. F.
|Keywords:||蝴蝶蘭;黃葉病;黑斑病;灰斑病;Fusarium solani;Haematonectria haematococca;Fusarium oxysporum;Fusarium proliferatum;Phalaenopsis;yellow leaf;black spot;gray spot;Fusarium solani;Haematonectria haematococca;Fusarium oxysporum;Fusarium proliferatum||Issue Date:||Jun-2012||Publisher:||中華民國植物病理學會||Journal Volume:||21||Journal Issue:||2||Start page/Pages:||115-130||Source:||植物病理學會刊||Abstract:||
出現黑腐病徵，有時在罹病葉鞘與根部黑腐部位出現成堆的橙紅色子囊殼，為Fusarium solani (有
性世代為Haematonectria haematococca) 所引起的黃葉病。蝴蝶蘭植株葉片與葉鞘出現不規則至圓
容易引起植株葉片黃化的病徵，係由F. oxysporum 所引起的灰斑病。蝴蝶蘭植株葉鞘與葉片出現
所引起的黑斑病。將黑斑病菌F0217-23 與F925L7 菌株單獨接種時，供試植株並不會出現黃葉的
病徵，但是與黃葉病菌FST1 菌株混合接種時，供試植株則出現葉片黃化病徵。又將FST1 菌株與
一步將FST1、F0217-23 及N8284 等菌株混合接種，植株會出現葉片黃化的病徵；然而，將F0217-23
速度，以FST1 菌株最快，菌絲生長速度介於4.8-5.3 mm/day，而F0217-23 與N8284 菌株之菌絲
This study was mainly focused on clarification of different diseases caused by three species
of Fusarium in Phalaenopsis. According to field survey, pathogen isolation, identification and
inoculation, the causal agents of different types of lesions such as yellow leaf, black spot and gray
spot were verified. The pathogen Fusarium solani (teleomorph Haematonectria haematococca)
caused yellow leaf of Phalaenopsis resulting in sheath and root rot, leaf yellowing and defoliation
from sheath. Basal sheath exposed black rot symptom. In some cases, those parts of tissue
displayed piles of orange-red perithecia. The pathogen F. oxysporum caused gray spot of
Phalaenopsis resulting in leaves and sheaths appeared irregular to round dark brown lesion in the
beginning, then lesion surrounded by a yellow halo and middle part of lesion turn gray color. If the
leaf base or sheath of plants is infected by pathogen, the plants will show leaf yellowing symptom.
The pathogen F. proliferatum caused black spot of Phalaenopsis resulting in circular to irregular
shaped black lesions on sheaths and leaves. In some Phalaenopsis cultivars, the leaves turn
yellowish after sheath was infected by this pathogen. For inoculation test, no yellow leaf symptom
appeared on the plants after inoculation of the black spot isolates of F0217-23 and F925L7. But
the tested plants showed yellow leaf symptoms after inoculation of the black spot isolates mixed
with the sheath and root rot isolate of FST1. On the other hand, all test plants showed leaf
yellowing after alone or mixed inoculation by FST1 and gray spot isolate of N8284. In addition,
the inoculated plants showed leaf yellowing after mixed inoculation of the isolates FST1,
F0217-23 and N8284. But the plants would not appear yellow leaf after mixed inoculation by the
isolates F0217-23 and N8284. The mycelial growth of FST1 isolate was faster than F0217-23 and
N8284 isolates. Mycelial growth rate of FST1 isolate was ranged from 4.8 to 5.3 mm/day, but
F0217-23 and N8284 isolates were ranged from 2.1 to 3.3 mm/day at 24-28 ℃. From this study,
the typical symptoms caused by three different species of Fusarium were clearly clarified. It will
be helpful to recognize the confusable symptoms of Phalaenopsis diseases in the field.
|Appears in Collections:||植物病理組|
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