Spray application factors and plant growth regulator performance: II. Foliar uptake of gibberellic acid and 2,4-D

Effects of droplet size and carrier volume on foliar uptake and translocation of gibberellic acid (GA3) and 2,4‐D were investigated. Simulated spray droplets were applied to primary leaves of 10‐day‐old Phaseolus vulgaris (cv Nerina) in droplet sizes and carrier volumes ranging from 0.5 to 10 μl and...

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Veröffentlicht in:Pesticide Science 1999-02, Vol.55 (2), p.166-174
Hauptverfasser: Knoche, Moritz, Bukovac, Martin J
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description Effects of droplet size and carrier volume on foliar uptake and translocation of gibberellic acid (GA3) and 2,4‐D were investigated. Simulated spray droplets were applied to primary leaves of 10‐day‐old Phaseolus vulgaris (cv Nerina) in droplet sizes and carrier volumes ranging from 0.5 to 10 μl and 10 to 200 μl per leaf, respectively. Doses of GA3 (2 μg per leaf) and 2,4‐D (100 μg per leaf) were held constant. Total uptake of GA3 approached a penetration equilibrium within 24 h after application, but uptake of 2,4‐D continued to increase. Decreasing droplet size and/or increasing carrier volume increased GA3 and 2,4‐D uptake. Translocation to stem and roots was positively related to total uptake. A positive linear relationship between the logarithm of the total droplet/leaf surface interface area and 2,4‐D uptake or translocation was found, but for GA3 this relationship was quadratic. Potential mechanisms of the effects of spray application factors on foliar uptake are discussed. © 1999 Society of Chemical Industry
doi_str_mv 10.1002/(SICI)1096-9063(199902)55:2<166::AID-PS886>3.0.CO;2-2
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Foliar uptake of gibberellic acid and 2,4-D</atitle><jtitle>Pesticide Science</jtitle><addtitle>Pestic. Sci</addtitle><date>1999-02</date><risdate>1999</risdate><volume>55</volume><issue>2</issue><spage>166</spage><epage>174</epage><pages>166-174</pages><issn>0031-613X</issn><issn>1526-498X</issn><eissn>1096-9063</eissn><coden>PSSCBG</coden><abstract>Effects of droplet size and carrier volume on foliar uptake and translocation of gibberellic acid (GA3) and 2,4‐D were investigated. Simulated spray droplets were applied to primary leaves of 10‐day‐old Phaseolus vulgaris (cv Nerina) in droplet sizes and carrier volumes ranging from 0.5 to 10 μl and 10 to 200 μl per leaf, respectively. Doses of GA3 (2 μg per leaf) and 2,4‐D (100 μg per leaf) were held constant. Total uptake of GA3 approached a penetration equilibrium within 24 h after application, but uptake of 2,4‐D continued to increase. Decreasing droplet size and/or increasing carrier volume increased GA3 and 2,4‐D uptake. Translocation to stem and roots was positively related to total uptake. A positive linear relationship between the logarithm of the total droplet/leaf surface interface area and 2,4‐D uptake or translocation was found, but for GA3 this relationship was quadratic. Potential mechanisms of the effects of spray application factors on foliar uptake are discussed. © 1999 Society of Chemical Industry</abstract><cop>London</cop><pub>John Wiley &amp; Sons, Ltd</pub><doi>10.1002/(SICI)1096-9063(199902)55:2&lt;166::AID-PS886&gt;3.0.CO;2-2</doi><tpages>9</tpages></addata></record>
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language eng
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source Periodicals Index Online; Wiley Online Library All Journals
subjects 2,4‐dichlorophenoxyacetic acid
4-dichlorophenoxyacetic acid
Agronomy. Soil science and plant productions
Biological and medical sciences
carrier volume
Cropping systems. Cultivation. Soil tillage
droplet size
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
gibberellic acid
penetration
spray volume
Tending. Growth control
Tillage. Tending. Growth control
translocation
title Spray application factors and plant growth regulator performance: II. Foliar uptake of gibberellic acid and 2,4-D
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