期刊
BIOLOGICAL CONTROL
卷 52, 期 2, 页码 167-173出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.biocontrol.2009.10.018
关键词
Botrytis cinerea; Compost tea; Disease suppression; Microbial antagonists; Oidium neolycopersici
资金
- Ministere de l'Agriculture, des Pecheries et de l'Alimentation du Quebec (MAPAQ)
Compost teas are fermented watery extracts of composted materials that are used for their ability to decrease plant disease. Non-aerated compost teas (NCT) prepared from five types of compost were tested for their ability to inhibit the growth of Alternaria solani, Botrytis cinerea, and Phytophthora infestans in vitro. Weekly applications of NCT were also used in greenhouse trials to assess their suppressive effect on powdery mildew (Oidium neolycopersici) and gray mold ( B. cinerea) on tomato plants. All NCT significantly inhibited the mycelial growth of A. solani (37-66%), B. cinerea (57-75%), and P. infestans (100%), whereas sterilized teas did not inhibit growth of the tested pathogens. Although NCT failed to efficiently control powdery mildew, they were able to control tomato gray mold for up to 9 weeks in greenhouse experiments. Among the tested compost teas, NCT prepared from sheep manure compost consistently provided the highest inhibition of mycelial growth and the highest disease suppression, in particular of gray mold (>95% disease reduction). The overall relative efficacy of the various NCT did not correlate well with microbial communities or physico-chemical composition of the prepared NCT. Results also suggest that the presence of the microorganisms in the NCT is a prerequisite for inhibition. (C) 2009 Elsevier Inc. All rights reserved.
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