A system to evaluate the performance of hydraulic nozzles used in stored grain preotection trials

Authors

  • Javier A. Vásquez-Castro Universidad Nacional Agraria La Molina; Depto. de Entomología
  • Gilberto C. de Baptista USP; ESALQ; Depto. de Entomologia, Fitopatologia e Zoologia Agrícola
  • Casimiro D. Gadanha Jr. USP; ESALQ; Depto. de Engenharia Rural
  • Luiz R.P. Trevizan USP; ESALQ; Programa de Pós-Graduação em Entomologia

DOI:

https://doi.org/10.1590/S0103-90162007000600001

Keywords:

application technology, gas chromatography, insecticide deposits, corn, wheat

Abstract

We developed a system to evaluate the performance of hydraulic nozzles used in stored corn and wheat grain protection experiments. An insecticidal mix was used as test fluid to determine the transversal volumetric distribution and droplets spectrum of a model TJ-60 8002EVS hydraulic nozzle. A mobile application system was built to apply a rate equivalent to 5 L t-1 and obtain theoretical concentrations of 10 and 0.5 mg kg-1 of fenitrothion and esfenvalerate, respectively. The corn and wheat grains were spread out as a fine layer. Three glass slides (0.1 × 0.05 m) were placed on the top surface of the grains to ensure that the intended application rate was achieved. After treatment, the deposits on both matrices were analyzed by gas chromatography. The fenitrothion deposit was higher than esfenvalerate, and the deposit on wheat was higher than on corn grains (P < 0.05). The deposits on the glass slides reached values of 100 and 93% of the intended theoretical fenitrothion and esfenvalerate concentrations, respectively. Deposits on the grains were lower than on the glass slides, with values of 64 and 52% of the intended theoretical fenitrothion and esfenvalerate concentrations, respectively. The results obtained demonstrate a high effectiveness of the method for evaluation of the performance of hydraulic nozzles when an insecticidal mix is used as test fluid. The factors that influenced insecticide deposition on glass slides and on grains are discussed in the present work.

Downloads

Download data is not yet available.

Downloads

Published

2007-12-01

Issue

Section

Agricultural Engineering

How to Cite

A system to evaluate the performance of hydraulic nozzles used in stored grain preotection trials . (2007). Scientia Agricola, 64(6), 563-568. https://doi.org/10.1590/S0103-90162007000600001