DETERMINATION OF RHEUM RHAPONTICUM L. EXTRACTS INSECTICIDAL ACTIVITY FOR APHIDIDAE PESTS CONTROLLING
ALLA GLADCAIA, MARIA ZAVATIN, LEONID VOLOSCIUC Institute of Genetics, Physiology and Plant Protection of Academy of Sciences of Moldova, Chisinau, Republic of Moldova. f.: (+373 22) 77-04-47, e-mail: asm_igfpp@yahoo.com
The rhubarb root, leaves and inflorescence extracts are a source of various bioactive substances. As part of the chemical raw materials from Rheum rhaponticum, 3 basic bioactive substances, that are promising for the creation of plant protection products, can be identified - emodin (pesticide, antifidant, bactericide, fungicide), quercetin (antifidant for flying insects, pesticide, bactericide, antiviral, aldose-reductase inhibitor) and oxalic acid (antiseptic, activator). The action of R. rhaponticum extracts on the Aphididae family pests was determined. Insecticidal activity of rhubarb leaves extract against aphids (57.8%) allows using it in environmental protection of plants in combination with insecticides, in order to reduce the number of chemical treatments.