Comparison of microscopic method and computational program for pesticide deposition evaluation of spraying

Pesquisa Agropecuária Brasileira

Aldemir Chaim²  Maria Conceição Peres Young Pessoa²  João Camargo Neto¹  Luiz Carlos Hermes² 

[1] ,Embrapa Centro Nacional de Pesquisa de Monitoramento e Avaliação de Impacto Ambiental Jaguariúna SP

关键词: agricultural chemicals;    aerial application;    application methods;    density;    volume;    produtos agroquímicos;    aplicação aérea;    métodos de aplicação;    densidade;    volume;   

DOI  :  10.1590/S0100-204X2002000400010

来源: SciELO

【 摘 要 】

The main objective of this work was to compare two methods to estimate the deposition of pesticide applied by aerial spraying. Hundred and fifty pieces of water sensitive paper were distributed over an area of 50 m length by 75 m width for sampling droplets sprayed by an aircraft calibrated to apply a spray volume of 32 L/ha. The samples were analysed by visual microscopic method using NG 2 Porton graticule and by an image analyser computer program. The results reached by visual microscopic method were the following: volume median diameter, 398±62 mum; number median diameter, 159±22 mum; droplet density, 22.5±7.0 droplets/cm² and estimated deposited volume, 22.2±9.4 L/ha. The respective ones reached with the computer program were: 402±58 mum, 161±32 mum, 21.9±7.5 droplets/cm² and 21.9±9.2 L/ha. Graphs of the spatial distribution of droplet density and deposited spray volume on the area were produced by the computer program.

【 授权许可】

CC BY   
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