Effect of plant extract Ruta graveolens against green peach aphid, Myzus persicae , at Biskra oasis, Algeria

The green peach aphid, Myzus persicae Hemiptera Aphididae is one of the most damaging insect pests of greenhouse crops, and has been causing considerable damage in Biskra oasis To minimize the side effect of chemical use against M persicae a study was conducted at Oasis of Biskra, by applying plant extract of common rue, Ruta graveolens Sapindales Rutaceae Extracts were sprayed on the first, second and sixth day of the week Different extracts were used seed extract and dry leaf extract, with three concentrations 10 30 50 g/l Extracts were tested on different larval stages and adults in the laboratory and greenhouse, during the autumn and winter period of years 2020 2021 Results showed that the mortality is related to the type and concentration of extracts, especially on larval stages The highest cumulative larval mortality was found 72 hours after spraying the seed extract, with 83 larval mortality under laboratory conditions and 70 mortality under greenhouse For adult, 70 mortality under laboratory conditions and 45 mortality under greenhouse.