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Organosilicone Adjuvant Effects on Glyphosate Efficacy and Rainfastness

Published online by Cambridge University Press:  12 June 2017

Krishna N. Reddy  and
Megh Singh
Krishna N. Reddy
Affiliation:
Citrus Res. and Educ. Center, Univ. Fla., IFAS, 700 Experiment Station Road, Lake Alfred, FL 33850
Megh Singh
Affiliation:
Citrus Res. and Educ. Center, Univ. Fla., IFAS, 700 Experiment Station Road, Lake Alfred, FL 33850
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Abstract

Greenhouse studies were conducted to evaluate the effectiveness of Kinetic, a silicone adjuvant that appeared to increase the efficacy and rainfastness of the isopropylamine salt of glyphosate on velvetleaf, sicklepod, barnyardgrass, guineagrass, yellow foxtail, and yellow nutsedge. Simulated rainfall of 1.3 cm in 5 min at 15 and 60 min after herbicide treatment reduced glyphosate efficacy on all weeds. Kinetic enhanced glyphosate efficacy when yellow nutsedge and guineagrass were subjected to post-spray rainfall at 60 min. On velvetleaf, sicklepod, and yellow foxtail, Kinetic improved glyphosate efficacy when the critical rain-free period was reduced to 15 min. Kinetic failed to provide rainfastness for barnyardgrass, thereby indicating a specificity of Kinetic for certain weed species.

Keywords

Glyphosate, N-(phosphonomethyl)glycinebarnyardgrass, Echinochloa crus-galli (L.) Beauv. ♯ ECHCGguineagrass, Panicum maximum Jacq. ♯ PANMAsicklepod, Cassia obtusifolia L. ♯ CASOBvelvetleaf, Abutilon theophrasti Medik. ♯ ABUTHyellow foxtail, Setaria glauca (L.) Beauv. ♯ SETLUyellow nutsedge, Cyperus esculentus L. ♯ CYPESRainfallsurface tensionsurfactantABUTHCASOBCYPESECHCGPANMASETLU
Type
Research
Information
Weed Technology , Volume 6 , Issue 2 , June 1992 , pp. 361 - 365
Copyright
Copyright © 1990 by the Weed Science Society of America 

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References

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