Non-chemical methods for control of the rose aphid Macrosiphum rosae (L.) was evaluated under field conditions at the Experimental Field of the Agricultural University in Plovdiv. Three bioinsecticides: the botanical NeemAzal T/S (azadirachtin) and Pyrethrum FS EC (pyrethrin + sesame oil + soft potassium soap) and the microbial Preferal WG (Paecilomyces fumosoroseus), allowed for application in organic farming in Bulgaria, were studied. The botanical insecticide Pyrethrum FS EC showed a fast initial action and good effectiveness of 75.48% on the first day after treatment. Other insecticides - NeemAzal T/S and Preferal WG had insufficient effect on the rose aphid and the efficacy at the higher concentrations reached 44.66% and 57.32% respectively on the 5th day after treatment.
Efficacy of non-chemical insecticides for control of the rose aphid Macrosiphum Rosae L. (Hemiptera, Aphididae) on ornamental roses