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Morphological and Histological Effects of Sethoxydim on Corn (Zea mays) Seedlings

Published online by Cambridge University Press:  12 June 2017

Hideo Hosaka ,
Hideo Inaba ,
Atsushi Satoh  and
Hisao Ishikawa
Hideo Hosaka
Affiliation:
Nisso Institute for Life Science, Nippon Soda Co., Ltd., 930 Oiso, 255 Kanagawa, Japan
Hideo Inaba
Affiliation:
Nisso Institute for Life Science, Nippon Soda Co., Ltd., 930 Oiso, 255 Kanagawa, Japan
Atsushi Satoh
Affiliation:
Nisso Institute for Life Science, Nippon Soda Co., Ltd., 930 Oiso, 255 Kanagawa, Japan
Hisao Ishikawa
Affiliation:
Nisso Institute for Life Science, Nippon Soda Co., Ltd., 930 Oiso, 255 Kanagawa, Japan
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Abstract

The herbicidal action of sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} on corn (Zea mays L. ‘Goldencrossbantam’) was investigated in preemergence and postemergence experiments and hydroponic culture. Soil-applied sethoxydim did not inhibit corn germination. Leaves failed to emerge through the coleoptile with a high herbicide rate (1.6 kg ai/ha), but chlorotic leaves emerged at a lower rate (0.8 kg ai/ha). Growth of corn seedlings treated with a foliar application of 0.2 kg ai/ha was inhibited within 1 day after treatment, but at a lower application rate (0.05 kg ai/ha) growth continued with chlorotic zones on newly expanding leaves. Over the concentration range 3 × 10-5 to 1 × 10-6 M, sethoxydim inhibited the growth of primary roots of corn in hydroponic culture within 24 h. Cytological investigation showed that sethoxydim inhibited cell division but did not interfere with mitosis.

Keywords

Root growthshoot growthmitosismorphologymeristematic tissue
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 32 , Issue 6 , November 1984 , pp. 711 - 721
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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