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Influence of Climate and Additives on Bentazon

Published online by Cambridge University Press:  12 June 2017

John D. Nalewaja ,
Jerzy Pudelko  and
K. A. Adamczewski
John D. Nalewaja
Affiliation:
North Dakota State Univ., Fargo, ND 58102
Jerzy Pudelko
Affiliation:
Coll. of Agr. in Poznan, Poland
K. A. Adamczewski
Affiliation:
Coll. of Agr. in Poznan, Poland
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Abstract

Experiments were conducted in the growth chamber and greenhouse to determine the influence of humidity, temperature, simulated rainfall, and oil additives with bentazon [3-isopropyl-1H-2,1,3-benzothiadiazin-(4) 3H-one 2,2-dioxide] upon redroot pigweed (Amaranthus retroflexus L.) control. Generally, bentazon gave increased redroot pigweed control with high rather than low humidity. However, the increased weed control with high humidity was greater at 10 C than at 20 or 30 C. A simulated rainfall within 24 hr after bentazon application reduced redroot pigweed control. A simulated rainfall of 650 L/ha within 1.5 hr after bentazon application increased control of redroot pigweed, while more than 1300 L/ha simulated rainfall decreased redroot pigweed control. Emulsifiable linseed oil and petroleum oil additives to the spray reduced the detrimental effect of low humidity and simulated rainfall upon redroot pigweed control with bentazon. Emulsifiable linseed oil was more effective than petroleum oil in reducing the detrimental effect of low humidity and of simulated rainfall. However, emulsifiable linseed oil reduced the redroot pigweed control with bentazon with high humidity at 30 C compared to bentazon applied alone or with petroleum oil.

Type
Research Article
Information
Weed Science , Volume 23 , Issue 6 , November 1975 , pp. 504 - 507
Copyright
Copyright © 1975 by the Weed Science Society of America 

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References

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