Environmental risk for aquatic and terrestrial organisms associated with drift from pesticides used in soybean crops

Bueno, Mariana Rodrigues; Cunha, João Paulo Arantes Rodrigues da

doi:10.1590/0001-3765202020181245

Cited by 4 publications

(1 citation statement)

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“…Phytosanitary products play an important role in agriculture because of the growing need for high yields and the intensive production of food in a sustainable manner (Bueno & Cunha, 2020). The vast majority of agrochemicals used are sprayed via hydraulic spray nozzles.…”

Section: Introductionmentioning

confidence: 99%

Spray Nozzle Wear Effects on Droplet Population

et al. 2022

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The wear rate of spray nozzles affects several factors. This study aimed to investigate the influence of spray nozzle wear rate on droplet characteristics, such as droplet size, droplet homogeneity, droplets prone to drift, and flow rate variation. Eight hydraulic nozzles models were subject to an accelerated wear test, and their effects were measured at six experimental wear times (0, 10, 20, 30, 40, and 50 hours). The following variables were evaluated: volume median diameter, percentage of spray volume containing droplets smaller than 100 μm (prone to spray drift), flow rate (L min -1 ), and relative span, which indicates droplet size homogeneity. The droplet population was measured using a laser particle size analyzer. The use of the spray nozzle tip influences the quality of the spray application due to the wear rate. This study revealed a linear increase in the flow rate and volume median diameter as functions of the wear rate increment. The droplet size increased over the wear time, which consequently modified the volume percentage of droplets smaller than 100 μm and significantly increased the relative span.

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Section: Introductionmentioning

confidence: 99%