The Growth Rate of Apple Bitter Rot Lesion, Caused by Colletotrichum spp., is Affected by Temperature, Fungal Species, and Cultivar
The growth and symptom development of two fungal species, Colletotrichum siamense, and C. fioriniae were examined using in vitro and in planta assays. In a plate assay, C. siamense grew fastest at 30 °C and at 25 °C, but C. fioriniae grew slower at 30 °C than at 25 °C. With apple inoculation assay, the mean lesion diameters at 30 °C were significantly larger (P ≤ 0.05) than that at 20 °C on a cultivar Ida Red for both fungal species. On the other hand, the mean lesion diameter on a cultivar Golden Delicious was significantly larger at 20 °C than at 30 °C for both fungal species. Therefore, the rate of lesion development was influenced not only by fungal species and incubation temperature but also by apple cultivar. In this study, cultivar ‘Ida red’ was found to be more susceptible to C. siamense under warm environmental condition. Although both species were able to grow at 10 °C in the plate assay, no disease symptoms were developed at 10 °C with the inoculation assay. Although the numbers of cultivar and fungal species are small, to our knowledge, this is the first report to describe potential interactive effect among Colletotrichum species, temperature, and apple cultivar on the rate of bitter rot symptom development.
Berger, R. D. 1973. Helminthosporium turcicum lesion numbers related to numbers of trapped spores and fungicide sprays. Phytopathology, 63: 930. https://doi.org/10.1094/phyto-63-930
Berger, R. D., A. B. Filho and L. Amorim. 1997. Lesion expansion as an epidemic component. Phytopathology, 87: 1005-13. https://doi.org/10.1094/phyto.19220.127.116.115
Biggs, A. R. and S. S. Miller. 2001. Relative susceptibility of selected apple cultivars to Colletotrichum acutatum. Plant Disease, 85: 657-60. https://doi.org/10.1094/pdis.2001.85.6.657
Bonants, P., M. Edema and V. A. R. G. Robert. 2013. Q‐bank, a database with information for identification of plant quarantine plant pest and diseases. EPPO Bulletin, 43: 211-15.
Brown, G. E. 1975. Factors affecting postharvest development of Collectotrichum gloeosporioides in citrus fruits. Phytopathology, 65: 404. https://doi.org/10.1094/phyto-65-404
Damm, U., P. F. Cannon, J. H. C. Woudenberg and P. W. Crous. 2012. The Colletotrichum acutatum species complex. Studies in Mycology, 73: 97-113. https://doi.org/10.3114/sim0010
Emge, R. G. 1975. Growth of the sporulating zone of Puccinia striiformis and its relationship to stripe rust epiphytology. Phytopathology, 65: 679-85. https://doi.org/10.1094/phyto-65-679
Erincik, O., L. V. Madden, D. C. Ferree and M. A. Ellis. 2003. Temperature and wetness-duration requirements for grape Leaf and cane infection by Phomopsis viticola. Plant Disease, 87: 832-40. https://doi.org/10.1094/pdis.2003.87.7.832
Lannou, C., C. Vallavieille-Pope and H. Goyeau. 1994. Host mixture efficacy in disease control: Effects of lesion growth analyzed through computer-simulated epidemics. Plant Pathology, 43: 651-62. https://doi.org/10.1111/j.1365-3059.1994.tb01603.x
Shane, W. W. 1981. Germination, appressorium formation, and infection of immature and mature apple fruit by Glomerella cingulata. Phytopathology, 71: 454-61. https://doi.org/10.1094/phyto-71-454
Weir, B. S., P. R. Johnston and U. Damm. 2012. The Colletotrichum gloeosporioides species complex. Studies in Mycology, 73: 115-80. https://doi.org/10.3114/sim0011
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