Phytopathology (1996) 86, p. S81 (Luo et al.)

Y. Luo and D.O. TeBeest (1996)
Competition between wild type and mutant isolates of Colletotrichum gloeosporioides f.sp. aeschynomene on northern jointvetch
Phytopathology 86 (11 suppl.), S81-S81
Abstract: The competitiveness of wild type (3-1-3), benomyl resistant (1121), and nitrate non-utilizing (Nit A) isolates of Colletotrichum gloeosporioides f. sp. aeschynomene on northern jointvetch was studied in treatments consisting of 22C, 28C and 32C dew temperature and incubation temperature interactions. Adult plants were inoculated with spore suspensions consisting of 3-1-3 plus 1121 or Nit A conidia. Plants were incubated in dew chambers at 22, 28 or 32C for 24 hours then moved into growth chambers at 22, 28 or 32C for seven days. Three replications of the experiments were conducted. The competitiveness of each isolate was measured as the proportion of lesions from which each isolate was isolated in each treatment. In most treatments, B21 was significantly more competitive than 3-1-3 while Nit A was significantly less competitive than 3-1-3. At dew temperature of 32C, 3-1-3 was significantly more competitive, and B21 was significantly less competitive than at 22C. Various dew and incubation temperatures did not cause significant differences in competitiveness of either 3-1-3 and Nit A when the two isolates were co-inoculated.
Database assignments for author(s): Yong Luo

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

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Aeschynomene virginica (weed)
Colletotrichum gloeosporioides (weed pathogen)	Aeschynomene virginica (weed)