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Influence of Formulation on the Activity and Persistence of Pendimethalin

Published online by Cambridge University Press:  20 January 2017

Ageliki S. Hatzinikolaou ,
Ilias G. Eleftherohorinos  and
Ioannis B. Vasilakoglou
Ageliki S. Hatzinikolaou
Affiliation:
Laboratory of Agronomy, Box 233, University of Thessaloniki, 54124 Thessaloniki, Greece
Ilias G. Eleftherohorinos*
Affiliation:
Laboratory of Agronomy, Box 233, University of Thessaloniki, 54124 Thessaloniki, Greece
Ioannis B. Vasilakoglou
Affiliation:
Laboratory of Agronomy, Box 233, University of Thessaloniki, 54124 Thessaloniki, Greece
*
Corresponding author's E-mail: eleftero@agro.auth.gr
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Abstract

The activity of emulsifiable concentrate (EC) formulation of pendimethalin was studied using a petri dish bioassay based on root response of corn, oat, sorghum, and sugar beet grown in soil. Furthermore, the oat bioassay was used to determine the activity of EC, microencapsulated (ME), and water-dispersible granule (WDG) formulations of pendimethalin. Also, field persistence in soil of these pendimethalin formulations was studied with petri dish and pot bioassays, based on root response of oat and sugar beet. All bioassays indicated that activity of all pendimethalin formulations was increased with increasing herbicide concentration. In silty clay loam soil, oat and sugar beet exhibited the highest sensitivity to EC-pendimethalin concentrations and corn the lowest; sorghum showed intermediate herbicide sensitivity. EC of pendimethalin showed the highest activity on oat and ME pendimethalin the lowest; WDG-pendimethalin showed similar activity to that of ME pendimethalin. Field persistence was significantly increased with increasing rate of application, but it was slightly increased by the ME formulation.

Keywords

Pendimethalincorn, Zea mays L. ‘Pioneer Costanza’oat, Avena sativa L. ‘Kassandra’sorghum, Sorghum bicolor L. ‘5515’sugar beet, Beta vulgaris L. ‘Bianca’Microencapsulated formulationpendimethalinDAT, days after treatmentEC, emulsifiable concentrateGI10, days after treatment for 10% oat root growth inhibitionGR50, herbicide concentration required to give 50% inhibition of plant indicator root growthME, microencapsulatedPRE, preemergenceWDG, water-dispersible granule
Type
Research
Information
Weed Technology , Volume 18 , Issue 2 , June 2004 , pp. 397 - 403
Copyright
Copyright © Weed Science Society of America 

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