EFFICACY OF NON-CHEMICAL INSECTICIDES AGAINST HYALOPTERUS PRUNI (HEMIPTERA: APHIDIDAE) ON PLUM

ABSTRACT The aim of the study was to establish the efficacy of nonchemical insecticides, from different groups, for control of Hyalopterus pruni on plum. The experiments were conducted under laboratory conditions. Three botanical insecticides with active ingredients pyrethrum (Pyretrum FS EC - 0.025%,0.05%,0.1%), nicotine (NicoTab - 1:1; 1:2; 1:3 with water) and azadirachtin (NeemAzal T/S – 0.1%; 0.3%; and 0.5% ) were used, as well as two microbial products based on Beauveria bassiana (NaturalisR - 2.3 x 107 spores/mL) and Paecilomyces fumosoroseus (PreFeRal WG - 2 x 10 9 CFU/g) in concentration 1%, 2%, 3%. All insecticides are registered in Bulgaria for other pest’s control, except for NicoTab, which is in an ongoing registration process. Experiments have shown that microbial insecticides, based on B. bassiana (NaturalisR) and P. fumosoroseus (PreFeRal WG) in concentration 2% and 3%, as well as botanical insecticides with active ingredients pyrethrum (Pyretrum FS EC in concentration 0.05% and 0.1%) and nicotine (NicoTab in a ratio of 1:1 and 1:2 with water) have high efficacy against H. pruni. They are suitable for pest control in organic orchards. The insecticides based on azadirachtin has low efficacy and are not suitable for control of this aphid