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Occurrence of Pythium species in long-term maize and soybean monoculture and maize/soybean rotation

Published online by Cambridge University Press:  01 December 1998

B. Q. ZHANG ,
W. D. CHEN  and
X. B. YANG
B. Q. ZHANG
Affiliation:
Department of Plant Pathology, Iowa State University, Ames, 50011, U.S.A.
W. D. CHEN
Affiliation:
Illinois Natural History Survey, Champaign, 61820, U.S.A.
X. B. YANG
Affiliation:
Department of Plant Pathology, Iowa State University, Ames, 50011, U.S.A.
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Abstract

The occurrence and relative abundance of Pythium species were quantified by using a cucumber seed baiting assay and P10VP agar medium, and compared among three long-term cropping systems: continuous maize (CC), continuous soybean (SS) and maize soybean rotation (CS) at two Iowa locations. Soil types were different at the two locations. Four Pythium species were isolated, P. ultimum, P. torulosum and P. paroecandrum occurred in soils of all three cropping systems, and P. spinosum occurred in one SS and one CS field. More Pythium isolates were recovered from CS and SS composite soil samples than from CC samples. P. torulosum was isolated most frequently.

Type
Research Article
Information
Mycological Research , Volume 102 , Issue 12 , December 1998 , pp. 1450 - 1452
Copyright
© The British Mycological Society 1998

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