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Influence of tree growth on spray chemical deposits on peach leaves

Published online by Cambridge University Press:  27 March 2009

H. W. Hogmire ,
M. J. Wimmer ,
V. L. Crim ,
R. M. Welker ,
E. Wentz  and
R. R. Smith
H. W. Hogmire
Affiliation:
Division of Plant and Soil Sciences, West Virginia University Experiment Farm, Kearneysville, WV 25430, USA
M. J. Wimmer
Affiliation:
Department of Biochemistry, West Virginia University, Morgantown, WV 26506, USA
V. L. Crim
Affiliation:
Division of Plant and Soil Sciences, West Virginia University Experiment Farm, Kearneysville, WV 25430, USA
R. M. Welker
Affiliation:
Division of Plant and Soil Sciences, West Virginia University Experiment Farm, Kearneysville, WV 25430, USA
E. Wentz
Affiliation:
Department of Biochemistry, West Virginia University, Morgantown, WV 26506, USA
R. R. Smith
Affiliation:
Department of Biochemistry, West Virginia University, Morgantown, WV 26506, USA
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Summary

A 50–fold increase in peach tree growth over a 98-day spraying season resulted in a 64 and 96% reduction in nigrosine dye deposit in the periphery and centre of the tree, respectively. Drift from spraying of adjacent rows made a significant contribution (18–39%) to the total chemical deposit in the tree periphery in four of six applications. Drift between rows was not a factor in centre tree deposit, except for a 38% contribution in the initial application. A variable reduced application rate of methyl parathion, calculated using a regression equation, resulted in a more uniform deposit throughout the season than a full application rate, providing comparable control of Oriental fruit moth with c. 50% less insecticide.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 118 , Issue 1 , February 1992 , pp. 77 - 81
Copyright
Copyright © Cambridge University Press 1992

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References

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