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http://dx.doi.org/10.5423/RPD.2003.9.3.131

Influence of Temperature, Wetness Duration and Fungicides on Fungal Growth and Disease Progress of Soybean Anthracnose Caused by Colletotrichum spp.  

Oh, Jeung-Haing (College of Bio-resources Science, Dankook University)
Kim, Gyu-Hong (College of Bio-resources Science, Dankook University)
Publication Information
Research in Plant Disease / v.9, no.3, 2003 , pp. 131-136 More about this Journal
Abstract
The effects of temperature, duration of wetness period, and fungicides on the spore germination, appressorium formation, acervulus formation and lesion development by Colletotrichum spp., cause of soybean anthracnose, and their pathogenicity were assessed in controlled environment. C. gloeosporioides was highly pathogenic on inoculated soybean seeds as high as C. truncatum, whereas remarkably low on the soybean leaves. Spore germination, appressorium formation and mycelial growth of C. gloeosporioides were best at $25^{\circ}C$, but C. truncatum was best at $30^{\circ}C$. It has also done at $15^{\circ}C$, even though it was much retarded. C. truncatum showed high sensitivity to the fungicides, fluazinam and benomyl, meanshile C. gloeosporioides showed to fluazinam and triflumizole. At least 8 hrs. of wetness period was requird for the pathogen to develop lesions at $30^{\circ}C$. When the wetness period was 32 hrs. lesion size of was larger at $25^{\circ}C$ than $30^{\circ}C$, however it was traceable at $20^{\circ}C$. Different sensitivity of Colletotrichum spp. to fungicides suggests that proper fungicide is required to effective control of soybean anthracnose ingected multiply with Colletotrichum spp.
Keywords
Colletotrichum spp.; fungicides; temperature; wetness duration;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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