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Effects of Growth Regulators and Herbicides on Germination of Hydrilla Turions

Published online by Cambridge University Press:  12 June 2017

Kerry K. Steward*
Affiliation:
Crops Research Division, Agr. Res. Serv., U. S. Dep. of Agr., Fort Lauderdale, Florida

Abstract

Turions of Hydrilla verticillata (Casp.) were treated with gibberellic acid (GA), napthaleneacetic acid (NAA), indoleacetic acid (1AA), 2-chloroethane phosphonic acid, 6,7-dihydrodipyrido(1,2,-a:2′, 1′-c)-pyrazinediium salts (diquat), 1,1′dimethyl-4,4′-bipyridinium salts (paraquat), mono-N,N-dimethylcocoamine salt of 7-oxabicyclo (2.2.1)heptane-2,3-dicarboxylic acid (cocoamine salt of endothall), or the dimethyl amine formulation of 2,4-dichlorophenoxyacetic acid (2,4-D). Germination and growth of subterranean turions was enhanced by GA and axillary turions by 1AA and 2,4-D. The herbicides exhibited little phytotoxicity to the propagules.

Type
Research Article
Copyright
Copyright © 1969 Weed Science Society of America 

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