Etude bio-écologique du complexe parasitaire des pucerons du poivron sous serre dans la région de Mostaganem

Abstract

Aphids are small herbivorous insects, they cause considerable damage, attacking even the protected crops . Aphis gossypii and Myzus persicae are the most dominant species reducing the pepper plantes yeilds . our expermentation has contributed to the study of population dynamics of these species and the action of their predator (coccinelle and syrphe). The results were that the tow aphids species have shwn a gradual move te reach a maximum relative abudance :  Aphis gossypii :3320 individual by the date of the 14th March 2016, within 30 °C temperature average .  Myzus persicae : 735 indiidual by the date of the 4th April 2016 within 38 ° C temperature averege. We noticid that the larval stages are the ladybug and hoverflies which represnt an important approach element of biological control against htese pests populations.