Phytopathology (1996) 86, p. S62 (Wasilwa et al.)

L.A. Wasilwa, J.C. Corell and T.E. Morelock (1996)
Further characterization of Colletotrichum orbiculare for vegetative compatibility and virulence
Phytopathology 86 (11 suppl.), S62-S62
Abstract: A re-examination of races of C. orbiculare (Phytopathology 83:1190-1198) indicated that two races (race 1 and 2) could be distinguished on differential cucumber [Marketer (MK) and H19] and watermelon [Black Diamond (BD) and Charleston Gray (CG)] cultivars; furthermore, cucumber and cantaloupe isolates were in two VCGs (VCG 1 or 3) and watermelon isolates were in a single VCG (VCG 2). Cucumber isolates had a race 1 virulence phenotype and watermelon isolates had a race 2 virulence phenotype. Additional isolates were examined for vegetative compatibility and virulence. Several watermelon and cucuzzi gourd isolates in VCG 2 had a unique virulence phenotype and were therefore designated race 2B. A single melon isolate from Taiwan belonged to a new and previously undescribed VCG (VCG 11) and also had a race 2B phenotype. Several new cantaloupe isolates from the U.S. belong to VCG 2 and had a race 2 phenotype.

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Colletotrichum orbiculare	Cucumber (Cucumis sativus)
	Colletotrichum orbiculare	Melon (Cucumis melo)	Taiwan