Published in Scientific Papers. Series B, Horticulture, Vol. LXVI, Issue 1
Written by Dimitar KEHAYOV, Ivan ZAHARIEV, Petya GENKOVA
The aim of the present study is to compare some technological and economic parameters in the treatment of vines with pesticides using: axial and tangential fan sprayers. The following indicators are the degree of coverage of the leaf mass, the degree of penetration of the pesticide into the canopy of the vines and the price of the sprayers. From the experiments, calculations and analyzes conducted so far, it can be concluded that both sprayers meet to a very good extent the technological requirements after mandatory treatment of each vine row on both sides. The degree of coverage of the leaf mass with drops is about 65% for axial and about 78% for tangential sprayers. The difference is due to the more concentrated and directed jet (from air and solution) in the tangential sprayer. This allows for good mixing and passing through the leaf mass. Regarding the other technological indicator - penetration rate - the results are approximately the same. Given the small difference in prices, this is a reason to recommend working with a tangential sprayer when treating vineyards with pesticides.
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