دبوب, كريمةغرايسة, نورة2021-05-042021-05-042017http://dspace.univ-eloued.dz/handle/123456789/8516التنوع البيئي و فيزيولوجيا النباتThis study aim to test the effectiveness of aqueous extracts of Allium sativium (garlic), Allium cepa (onion) and Cloeme Arabica, prepared with the infusion method on some pests that infect tomato plants by spraying them for purposes of biological control. The effect of the efficacy of the toxicity of these extracts in vitro has been studied at the following dosages: 10%, 50%, and 100%, on insect larvae tuta absoluta, Heliothis armigera and Aphis gossypii, where he was treated in two ways; Immerse the leaves and spray directly and follow the observation date ranges (24 hours, 48 hours). The results showed that all of these extracts with a toxic effect on the tested insects,comparable to chemical pesticide, In contrast, the results showed that the doses and time flow had a clear effect on the mortality rate. Death rate was 100% at Tuta absoluta and Aphis gossypii, and 70% for Heliothis armigera, using this through direct spraying, and for the soak sheets recorded slightly weaker spraying results. On the other hand, the results showed an improvement in the studied characteristics of the tomato plant treated with plant extracts compared to the control parameters. These extracts act as biostimulants of plant growth and development, which are easily absorbed by tomato plants.frplant extracts. Tomato plant. Pests. Biological control. Mortality rate. biostimulantsالمستخلصات النباتية ، نبات الطماطم ، نبات الثوم ، البصل ، التينMaster