Abstract
The present study evaluates the effectiveness of trunk injection technology against the city longhorn beetle, Aeolesthes sarta Solsky., one of the most destructive xylobiont pests of willow trees (Salix spp.). The research was conducted in Tashkent region during 2022–2025. Systemic insecticides were applied directly into the trunk using infusion systems at 3% and 4% working solution concentrations. The biological efficacy of the treatments was assessed under field conditions. The results demonstrated that Bagira 20% EC, Proclaim 5% WG and Agrofos-D 55% EC exhibited the highest efficacy. Although the 4% concentration provided maximum biological effectiveness, it also increased local damage to xylem tissues around the injection site. Considering both biological efficacy and phytotoxic safety, a 3% working solution was identified as the optimal concentration for trunk injection applications in willow plantations.
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