Articles
COMPARISON OF APPLE SCAB CONTROL WITH TRADITIONAL AND TUNNEL SPRAYERS AT FULL AND REDUCED CHEMICAL RATES
Article number
422_91
Pages
385 – 386
Language
Abstract
Biological efficacy of apple scab (Venturia inaequalis) control on Gloster/P2 – 4,0 x 2,5 m was evaluated for three sprayers: tunnel with directed air-jet discharge system, tunnel with cross flow fans and standard directed air-jet sprayer.
The trees were treated 7 times at spray volume 250 1/ha and 100 %, 50 %, 25 % rates of chemicals.
The percentage of leaves infected by apple scab was 1,2 – 3,4 % for the tunnel sprayers and 0,2 – 0,5 % for directed standard air-jet sprayer.
The difference in scab control efficacy for the sprayers may be explained by different air-jet discharge system affecting spray deposit pattern in the tree canopy.
The trees were treated 7 times at spray volume 250 1/ha and 100 %, 50 %, 25 % rates of chemicals.
The percentage of leaves infected by apple scab was 1,2 – 3,4 % for the tunnel sprayers and 0,2 – 0,5 % for directed standard air-jet sprayer.
The difference in scab control efficacy for the sprayers may be explained by different air-jet discharge system affecting spray deposit pattern in the tree canopy.
Authors
R. Holownicki, W. Goszczynski, G. Doruchowski, H. Nowacka
Keywords
tunnel sprayer, apple orchard, apple scab, biological efficacy
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