February
2007
, Volume
91
, Number
2
Pages
220
-
225
Authors
E.
Grimme
and
N. K.
Zidack
,
Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman 59717-3150
;
R. A.
Sikora
,
Inst. für Pflanzenkrankheiten, University of Bonn, Nussallee 9, 53115 Bonn, Germany
; and
G. A.
Strobel
and
B. J.
Jacobsen
,
Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman 59717-3150
Affiliations
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RelatedArticle
Accepted for publication 19 September 2006.
Abstract
ABSTRACT
A biorational synthetic mixture of organic components mimicking key antimicrobial gases produced by Muscodor albus was equivalent to the use of live M. albus for control of seedling diseases of sugar beet (Beta vulgaris) caused by Pythium ultimum, Rhizoctonia solani AG 2-2, and Aphanomyces cochlioides. The biorational mixture provided better control than the live M. albus formulation for control of root-knot nematode, Meloidogyne incognita, on tomato (Lycopersicon esculentum). The biorational mixture provided control of damping-off equal to a starch-based formulation of the live fungus for all three sugar beet pathogens, and significantly reduced the number of root-knot galls on tomato roots compared with a barley-based formulation. Rate studies with the biorational mixture showed that 2 and 0.75 µl/cm3 of soil were required to provide optimal control of Rhizoctonia and Pythium damping-off of sugar beet, respectively. Five microliters of biorational mixture per milliliter of water was required for 100% mortality in 24 h for Meloidogyne incognita in in vitro studies. In in vivo studies, 1.67 µl of the biorational mixture/cm3 of sand resulted in fewer root-knot galls than a Muscodor albus infested ground barley formulation applied at 5 g/liter of sand.
JnArticleKeywords
Additional keywords:
biological control,
biorational formulation,
soil fumigation
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ArticleCopyright
© 2007 The American Phytopathological Society