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Seed treatments enhance photosynthesis in maize seedlings by reducing infection with Fusarium spp. and consequent disease development in maize

Permanent URL:
http://handle.nal.usda.gov/10113/43937
Abstract:
Maize seed that was either treated with the fungicide Cruiser Extreme 250 ® (fludioxonil + azoxystrobin + mefenoxam + thiamethoxam) or not treated was planted at two Iowa locations in 2007. Root, mesocotyl and crown rot severity, incidence of Fusarium spp. colonisation and chlorophyll florescence (CF) were assessed at growth stages V2, V4 and V6, and stalk rot severity at R6. At both locations, seed treatment reduced disease severity and incidence of Fusarium spp. infection at all growth stages assessed. Measurements of CF decreased significantly with increased disease severity and incidence of Fusarium spp. at V2 and V4 at both locations, indicating that seedling disease negatively affected photosynthetic performance. Mesocotyl rot severity at V4 predicted crown rot severity at V6 at both locations, as well as crown rot at V6 and stalk rot at R6 at one location.
Author(s):
Rodriguez-Brljevich, C. , Kanobe, C. , Shanahan, J.F. , Robertson, A.E.
Subject(s):
Zea mays , corn , seeds , chemical control , pesticide application , fungicides , seedlings , photosynthesis , fungal diseases of plants , disease resistance , host-pathogen relationships , Fusarium , plant pathogenic fungi , pathogenicity , pathogenesis , thiamethoxam , microbial colonization , disease incidence , disease severity , crown rot
Format:
p. 343-347.
Note:
Includes references
Source:
European journal of plant pathology 2010 Mar., v. 126, no. 3
Language:
English
Publisher:
Dordrecht : Springer Netherlands
Year:
2010
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
File:
Download [PDF File]
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.