Implementation of novel spraying techniques in vineyards
Date Issued
December 2020
Author(s)
Advisor
Abstract
Decreasing pesticide use, improving spray coverage of crops, and reducing offtarget losses are crucial for improving the environmental performance of pest
management. The goal of the current Dissertation was to test and evaluate the
effectiveness of modern pesticide application technologies, with a focus on
lowering the volume rate and amount of pesticides used in vineyards. Chapter 1
evaluated spray coverage by a high-volume sprayer (1400 L ha-1
, HVS1400), an
air-assisted, low volume knapsack sprayer (150 L ha-1
, LVS150), and a motorized
knapsack dust applicator modified to spray liquid formulations (250 L ha-1
, CS250).
Mean spray coverage on leaves or bunches was below 21% for CS250, and above
40 and 55% for LVS150 and HVS1400, respectively. Downy mildew leaf infection
was below 5% throughout the season, with a significant effect of sprayer, time and
an interaction between sprayer and time (P < 0.001). Grape berry moth damage did
not differ between sprayers and the untreated control.
management. The goal of the current Dissertation was to test and evaluate the
effectiveness of modern pesticide application technologies, with a focus on
lowering the volume rate and amount of pesticides used in vineyards. Chapter 1
evaluated spray coverage by a high-volume sprayer (1400 L ha-1
, HVS1400), an
air-assisted, low volume knapsack sprayer (150 L ha-1
, LVS150), and a motorized
knapsack dust applicator modified to spray liquid formulations (250 L ha-1
, CS250).
Mean spray coverage on leaves or bunches was below 21% for CS250, and above
40 and 55% for LVS150 and HVS1400, respectively. Downy mildew leaf infection
was below 5% throughout the season, with a significant effect of sprayer, time and
an interaction between sprayer and time (P < 0.001). Grape berry moth damage did
not differ between sprayers and the untreated control.
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Phd Costas Michael 2020.pdf
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