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Selective Control of Cyperaceous Weeds With K-223

Published online by Cambridge University Press:  12 June 2017

Tetsuo Takematsu ,
Makoto Konnai ,
Takeo Akashiba  and
Nansho Seki
Tetsuo Takematsu
Affiliation:
Weed Contr. Res. Inst., Utsunomiya Univ., Utsunomiya-shi, Japan
Makoto Konnai
Affiliation:
Weed Contr. Res. Inst., Utsunomiya Univ., Utsunomiya-shi, Japan
Takeo Akashiba
Affiliation:
Central Res. Lab., Showa Denko Co., Ltd., Tamagawa, Ota-ku, Tokyo, Japan
Nansho Seki
Affiliation:
Central Res. Lab., Showa Denko Co., Ltd., Tamagawa, Ota-ku, Tokyo, Japan
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Abstract

A new urea compound, 1-(α,α-dimethylbenzyl)-3-p-tolylurea (hereinafter referred to as K-223) is characterized by its selective control of cyperaceous weeds. This compound does not show any Hill reaction inhibition or foliar contact toxicity. Its main effect is toxicity to roots. K-223 selectively controls slender spikerush [Eleocharis acicularis (L.) R. & S.], purple nutsedge (Cyperus rotundus L.) and annual cyperaceous weeds. It is practically nontoxic to most broadleaf weeds. As the selectivity between crops and grass weeds is high, K-223 is applicable with little phytotoxicity. Thus sowing or transplanting is possible even just after application of K-223.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 1 , January 1975 , pp. 15 - 19
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

Literature Cited

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