Maria Jaime, M.Sc. Student (1999 - 2001)


 
 
 
 
 

Email to Maria Jaime (currently Ph.D. student at the University of Toronto, Mississauga Campus)
 

Abstract of talk presented at CPS 2001 in London Ontario. Can. J. Plant Pathol. 23:198

Interaction between the vesicular arbuscular mycorrhizal fungus, Glomus intraradices and Sclerotium cepivorum, white rot in onions. M.D.L.A. Jaime1 , T. Hsiang2, M.R. McDonald1. 1Dept. Plant Agriculture,2Dept. Env. Biol., Univ. Guelph. Guelph, ON. Canada N1G2W1.  Studies were conducted to assess the potential of the vesicular arbuscular mycorrhizal fungus, Glomus intraradices, as a biological control of white rot caused by Sclerotium cepivorum Berk. Onion plants were seeded in the greenhouse in the medium PROMIX PGX® with the commercial formulation, MIKRO-VAM® incorporated at 1 g/plug or in PROMIX PGX® with MYCORISE® 1000 or with MYCORISE® 255 . This allowed for root colonization before the onions were transplanted. Onions were transplanted 6 - 7 weeks after seeding, into plots in two fields of organic soil naturally infested with S. cepivorum and at a site where S. cepivorum was not present. Disease incidence, extent of root colonization, and fresh and dry weight were recorded. Beneficial effects were observed in onions plants grown in MIKRO-VAM® and PROMIX PGX® with MYCORISE® 1000 at sites where white rot was present. Disease incidence at harvest was reduced by 31 to 49%. No differences in yield were found among treatments at the site that was free of white rot.