of or pertaining to phytotoxin.
inhibitory to the growth of or poisonous to plants.

1930–35; phyto- + toxic

phytotoxicity [fahy-toh-tok-sis-i-tee] , noun
nonphytotoxic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
phytotoxin (ˌfaɪtəˈtɒksɪn)
Compare zootoxin a toxin, such as strychnine, that is produced by a plant

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

phytotoxic phy·to·tox·ic (fī'tō-tŏk'sĭk)

  1. Poisonous to plants.

  2. Of or relating to a phytotoxin.

phy'to·tox·ic'i·ty (-tŏk-sĭs'ĭ-tē) n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
phytotoxic   (fī'tō-tŏk'sĭk)  Pronunciation Key 
Poisonous to plants.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Current studies are focused on finding those rates that provide disease control but do not have any phytotoxic effects.
The solids are phytotoxic if not treated prior to land application.
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