Automatic metered dose spraying for forestry

摘要

Forests are ecologically sensitive areas that require carefully targeted spays. Application may be made to Oyoung trees and stumps for insect pest and disease control or in restricted areas for the management of weeds. Vast areas require coverage ina relatively short space of time, which put pressures on forest management teams. Emphasis is on the use of portable applicators that deliver consistent accuracy with low volumes of liquid. This is achieved by the application of measured amounts of carefully targeted spray to restricted areas with so-called spot gun applicators or, in the case of band application, the use of controlled droplet application (CDA) using hand-held rotary atomisers. Hand-held metered volume dispensers (spot guns) are well established for forest spraying. But in the current climate of increasing concern for the health, safety and comfort of spray operators, spot guns suffer from one major drawback repeated squeezing of the trigger over a long periods of time is accompaniedby the increasing incidence of 'Repetitive Strain Injury'.