scholarly journals Emergence of Benzimidazole- and Strobilurin-Quinone Outside Inhibitor-Resistant Strains of Colletotrichum gloeosporioides sensu lato, the Causal Fungus of Japanese Pear Anthracnose, and Alternative Fungicides to Resistant Strains

2020 ◽  
Author(s):  
Nobuya Tashiro ◽  
Youichi Ide ◽  
Mayumi Noguchi ◽  
Hisayoshi Watanabe ◽  
Mizuho Nita
Keyword(s):  
Colletotrichum Gloeosporioides ◽  
Japanese Pear ◽  
Quinone Outside Inhibitor ◽  
Causal Fungus ◽  
Resistant Strains

Detection of Thiophanate-methyl-resistant Strains in Diplocarpon mail, Causal Fungus of Apple Blotch

2000 ◽  
Vol 66 (1) ◽  
pp. 82-85 ◽  
Author(s):  
Shuhei TANAKA ◽  
Nobue KAMEGAWA ◽  
Shin-ichi ITO ◽  
Mitsuro KAMEYA-IWAKI
Keyword(s):  
Thiophanate Methyl ◽  
Causal Fungus ◽  
Resistant Strains

Phenotypic variation for disease resistance and virulence within naturalized populations of Stylosanthes humilis and Colletotrichum gloeosporioides

1987 ◽  
Vol 38 (4) ◽  
pp. 717 ◽  
Author(s):  
T Vinijsanun ◽  
DF Cameron ◽  
JAG Irwin ◽  
A Barnes
Keyword(s):  
First Generation ◽  
Colletotrichum Gloeosporioides ◽  
Fungal Isolate ◽  
Single Spore ◽  
Pathogen Virulence ◽  
Stylosanthes Humilis ◽  
Causal Fungus ◽  
Selection For ◽  
Fourth Experiment ◽  
A Site

The extent of variation for host disease reaction and pathogen virulence was studied in naturalized populations of Stylosanthes hurnilis and Colletotrichurn gloeosporioides, the causal fungus of an anthracnose disease of Stylosanthes spp. Diseased plants (S0) were collected from the field at three sites (Townsville, Wrotham Park and Niall) in North Queensland, and first generation selfed (S1) progenies (host-lines) and single spore fungal cultures were grown for each of the collections made. Within a site, all host-lines were inoculated with each fungal isolate from that site, and a fourth experiment was conducted with representative host-pathogen combinations from each site. Sufficient seed was obtained to allow testing of 12, 10 and 8 collections from Niall, Wrotham Park and Townsville respectively. Significant variation (P < 0.01) between disease severity values for host-line means, fungal isolate means and host-line/fungal isolate interactions was found in all four experiments. Differences between fungal isolate means were the main source of variation in three of the four experiments. Both the differences in virulence within the pathogen population and the differences in resistance of the hostlines appeared to be quantitatively inherited. One host-line from Wrotham Park was significantly more resistant than the susceptible check, cv. Paterson, in two replicated experiments indicating that selection for some improvement in resistance within the naturalized populations should be possible. However, none of the host-lines from the Townsville and Niall sites were significantly more resistant than Paterson, suggesting that little natural selection for resistance has occurred within the naturalized host populations over the 10 years following the first outbreak of the disease in northern Australia.

scholarly journals Infection Components of Wild-Type and Mutant Strains of Colletotrichum gloeosporioides f. sp. aeschynomene on Northern Jointvetch

Plant Disease ◽  
1997 ◽  
Vol 81 (4) ◽  
pp. 404-409 ◽  
Author(s):  
Y. Luo ◽  
D. O. TeBeest
Keyword(s):  
Fungal Pathogens ◽  
Wild Type Strain ◽  
Colletotrichum Gloeosporioides ◽  
Wild Type ◽  
Biological Control Of Weeds ◽  
Lesion Number ◽  
Mutant Strains ◽  
Controlled Environments ◽  
Resistant Strains ◽  
Type Strains

Colletotrichum gloeosporioides f. sp. aeschynomene causes an anthracnose of northern jointvetch, Aeschynomene virginica. Infection components, including lesion number, latent period, lesion expansion rate, and sporulation, were measured in experiments conducted in controlled environments. Two wild-type strains (3-1-3 and CLA 5A), four benomyl-resistant strains (B13, B15, B18 and B21), and four nitrate nonutilizing mutant strains (Nit A, Nit R, Nit L, and Nit T) of the pathogen were tested. Nitrate nonutilizing strains caused significantly fewer lesions on northern jointvetch than did wild-type and benomyl-resistant strains. Latent periods were significantly shorter for the wild-type strain CLA 5A than for most other strains. Lesion expansion rates of all benomyl-resistant strains were significantly slower than those of the wild- type strains. Large variations in sporulation were observed for most strains, and no differences in sporulation were found between wild-type and mutant strains. The usefulness of infection component analysis for the identification of competitiveness of strains of fungal pathogens for biological control of weeds is discussed.

scholarly journals Seasonal change in basidiospore discharge of the causal fungus of Japanese pear dwarf, Fomitiporia sp.

2014 ◽  
Vol 80 (1) ◽  
pp. 3-10
Author(s):  
Y. KANEKO ◽  
H. NAKAMURA ◽  
A. SHIOTA ◽  
T. SUZUKI ◽  
T. SUZUKI ◽  
...  
Keyword(s):  
Seasonal Change ◽  
Japanese Pear ◽  
Causal Fungus
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