Symptoms of pine needle rust diseases was observed was observed in field in northeast region of China and surface structure of aeciospores from pines was observed on the scanning electron microscope on. It was found t...Symptoms of pine needle rust diseases was observed was observed in field in northeast region of China and surface structure of aeciospores from pines was observed on the scanning electron microscope on. It was found that the different symptoms of pine needle rust disease are directly related to surface of aeciospores. The pine needle rust disease of Pinus-Haploxylon has one symptom type (except Coleosporium pini -pumilae) and one aeciospore type. The pine needle rust disease of Pinus-Diploxylon has three symptom types and three aeciospore types.展开更多
Leaves of Perilla frutescens, commonly known as perilla are widely used in Korea, due to their medicinal properties. The rust disease of perilla interrupts its wide use every year. The present study was carried out to...Leaves of Perilla frutescens, commonly known as perilla are widely used in Korea, due to their medicinal properties. The rust disease of perilla interrupts its wide use every year. The present study was carried out to evaluate the control of perilla rust disease by using oak pyroligneous liquor having various biological properties. The rust disease infected perilla leaves were applied with 100 μl of oak pyroligneous liquor at different concentrations such as 6.25, 12.5, 25 and 50 μg/ml. Then the leaf samples were observed for the abortion of active rust pustules (yellow color) after 48 hours of incubation at 26?C. Further, inhibition of rust pustules development by oak pyroligneous liquor was evaluated on the leaves of artificially induced perilla rust disease. The best abortion of rust pustules by oak pyroligneous liquor was noticed at the concentration of 50 μg/ml, where 74.4% of the pustules were aborted. Discoloration of rust pustules was also observed in the treated leaves from yellow to white when compared with the untreated control. In addition, oak pyroligneous liquor completely inhibited the development of rust pustules in artificially induced leaves even at low concentration (6.25 μg/ml). The results clearly indicated that oak pyroligneous liquor is a good candidate for the management of Perilla rust disease.展开更多
A hyperparasitic fungus was found on uredinia of Coleosporium plumeria on leaves of Plumeria rubra in Thailand.The hyperparasite was identified as Ramularia coleosporii following an examination of its morphological ch...A hyperparasitic fungus was found on uredinia of Coleosporium plumeria on leaves of Plumeria rubra in Thailand.The hyperparasite was identified as Ramularia coleosporii following an examination of its morphological characters and a phylogenetic analysis by using ITS sequence data.This is the first record of R.coleosporii on C.plumeriae in Thailand.Ramularia coleosporii has the potential for biocontrol management strategies of the rust.展开更多
文摘1989年到1991年,于黑龙江省勃力县通天一林场,通过人工接种和野外观察、孢子形态大小比较、参考有关研究文献,把引起红松针锈病病原的鞘锈菌(Coleosporium Lev),看做为由若干个-寄生性不同的专化型组成的集合种(collective species)是较妥当的方案。按国际命名先后法规,用凤毛菊鞘锈菌(Coleosporium saussureae Th(?)men)作为集合种,分布在中国东北已明确了3个专化型:C.saussureae Th(?)men f. Sp. saussureae、C.saussureae Th(?)men f. sp. cimicifugatum (Th(?)merl ex komorov) Panstat.nov、 C.saussureae Th(?)men f. Sp.eupatorii(Hiratsuko f.) Pan stat. nov。
文摘Symptoms of pine needle rust diseases was observed was observed in field in northeast region of China and surface structure of aeciospores from pines was observed on the scanning electron microscope on. It was found that the different symptoms of pine needle rust disease are directly related to surface of aeciospores. The pine needle rust disease of Pinus-Haploxylon has one symptom type (except Coleosporium pini -pumilae) and one aeciospore type. The pine needle rust disease of Pinus-Diploxylon has three symptom types and three aeciospore types.
文摘Leaves of Perilla frutescens, commonly known as perilla are widely used in Korea, due to their medicinal properties. The rust disease of perilla interrupts its wide use every year. The present study was carried out to evaluate the control of perilla rust disease by using oak pyroligneous liquor having various biological properties. The rust disease infected perilla leaves were applied with 100 μl of oak pyroligneous liquor at different concentrations such as 6.25, 12.5, 25 and 50 μg/ml. Then the leaf samples were observed for the abortion of active rust pustules (yellow color) after 48 hours of incubation at 26?C. Further, inhibition of rust pustules development by oak pyroligneous liquor was evaluated on the leaves of artificially induced perilla rust disease. The best abortion of rust pustules by oak pyroligneous liquor was noticed at the concentration of 50 μg/ml, where 74.4% of the pustules were aborted. Discoloration of rust pustules was also observed in the treated leaves from yellow to white when compared with the untreated control. In addition, oak pyroligneous liquor completely inhibited the development of rust pustules in artificially induced leaves even at low concentration (6.25 μg/ml). The results clearly indicated that oak pyroligneous liquor is a good candidate for the management of Perilla rust disease.
基金supported by the Natural Science Foundation of China(No.31600024)。
文摘A hyperparasitic fungus was found on uredinia of Coleosporium plumeria on leaves of Plumeria rubra in Thailand.The hyperparasite was identified as Ramularia coleosporii following an examination of its morphological characters and a phylogenetic analysis by using ITS sequence data.This is the first record of R.coleosporii on C.plumeriae in Thailand.Ramularia coleosporii has the potential for biocontrol management strategies of the rust.
