Interactions between spray drift and sprayer travel speed in two different apple orchard training systems|
Lešnik, M.; Stajnko, D. & Vajs, S.
Trials were carried out in apple orchards of two
different training systems to assess the relationship
between spray drift and parameters of spraying with an
emphasis on the sprayer’s travel speed when applying
different solutions, such as pesticides or fertilizers, onto the
apple trees. The assessments were based on the following
factors: per cent of spay drift, two sprayers (axial- and
radial-fan sprayer), two training systems (super spindle and
modified slender spindle), spray droplet size (fine or coarse
droplets) and the sprayer’s travel speed (5 vs. 10 km h-1).
The studies were conducted in the spring and summer
seasons under similar external weather conditions to test
any seasonal effects that might occur. In this paper, all
tested factors and interactions were found to have a significant
effect on the spray drift during spray application.
For instance, the increase in sprayer speed reduced the
spray drift percentage. Other factors, such as sprayer type
(axial fan and radial fan) and tree training system, had an
impact on spray drift as well.
Adjacent areas; Application of pesticides; Pollution