Qualilitative distribution of spray deposit by using some ground spraying techniques on olive trees for controlling Parlatoria Oleae ( Colvee ) (Hemiptera : Diaspididae) [electronic resource].

Includes references.

The aim of this study is to evaluate the specific ground sprayer units for controlling Parlatoria oleae Colvee infesting olive trees by using different pesticides. The experiments included spray volume coverage on the olive trees and sources of pollution as pesticides lost on ground and drift spray solution. The tested sprayer units were conventional ground motor sprayer with hydraulic spray gun (860 l/fed.), knapsack motor sprayer (Taral 518) with its original pneumatic atomizer (430 l/fed.). It is worth mentioning that, this model has its poster pum. In a modification for the taral motor its atomizer was replaced by three Tee-Jet nozzles (DS-45 or DB-45 as 430 and 568 l/fed., respectively) fitted perpendicular to the air stream. In the case of DS-45 modification the conventional ground motor sprayer tank was used as source for spray solution under pressure. Super masrona (mineral spray oil) at the rate of 1-5% alone or at the rate of 1% mixed with organophosphorous Sumithion 50% EC at rate of 0.15% + 0.5 gm/liter fluoresin sodium were sprayed in this experiment. Qualitative distribution of droplets using water sensitive cards indicated that, conventional ground motor sprayer has the highest number of droplets/cm2 and highest droplet sizes VMD um per droplets over most of measured spots.

Summary in Arabic.

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