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Effects of Herbicides on Endomycorrhizal Fungi in Florida Citrus (Citrus spp.) Soils

Published online by Cambridge University Press:  12 June 2017

Stan Nemec  and
David Tucker
Stan Nemec
Affiliation:
V.S. Dep. Agric., Agric. Res. Serv., V.S. Hort. Res. Lab., Orlando, FL 32803
David Tucker
Affiliation:
Univ. of Florida Inst. Food Agric. Sci., Agric. Res. Ed. Ctr., 700 Exp. Stn. Rd., Lake Alfred, FL 33850
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Abstract

Herbicide effects on vesicular-arbuscular mycorrhizal fungi were studied in greenhouse and field tests. In field plots treated with a bromacil (5-bromo-3-sec-butyl-6-methyluracil) and diuron (3-[3,4-dichlorophenyl]-1,1-dimethylurea) mixture, fungus infection was similar to levels present in cultivated plots. A slight reduction of infection occurred in roots of grove trees in a simazine (2-chloro-4,6-bis [ethylamino]-s-triazine) plus paraquat (1,1′-dimethyl-4,4′-bipyridinium ion)-treated plot compared to a cultivated plot. In the greenhouse studies, diuron, bromacil, and trifluralin (α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine) had no apparent effect on Glomus etunicatus Becker and Gerd. and plant growth. Paraquat, PPG 844 {1-(carboethoxy) ethyl 5-[2′-chloro-4′-(trifluoromethyl) phenoxy]-2-nitrobenzoate} and simazine adversely affected plant growth and the fungus.

Keywords

Vesicular-arbuscular mycorrhizal fungipesticidessoil microorganisms

Information

Type
Research Article
Information
Weed Science , Volume 31 , Issue 4 , July 1983 , pp. 427 - 431
Copyright
Copyright © 1983 Weed Science Society of America 

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References

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