Etude des effets biocides des extraits de trois plantes spontanées récoltées dans la région de Ghardaïa au Sahara Algérien

Abstract

The aim of this work is to verify the biocidal efficacy of plant extracts of three Saharan plants, namely Pergularia tomentosa L. (Asclepiadaceae); Euphorbia guyoniana Boiss. & Reut. (Euphorbiaceae) and Asphodelus tenuifolius Cav. (Asphodelaceae) on Meloidogyne spp. Nematodes and black aphid Aphis fabae L. (Homoptera-Aphididae). These extracts gave very satisfactory results. We reported very high mortality rates after 45 days of application of extracts for nematicidal effects; the gall index according to Taylor and Sasser equals 3 on the scale for the extract of Pergularia tomentosa L and the mixture of Pergularia + Asphodelus. The results obtained for the insecticidal effect during which mortality rates vary between 81.45% and 97.03% are reported