Abstract— To see the impact of insecticide vegetable oil (Neem) on aphid of the green alfalfa, we conducted tests to compare with the synthetic product Malyphos most used by farmers in our region. Because of these, we treated the plants alfalfa infested by aphids with doses of product and the vegetable oil of Neem. In spring-summer or there is a significant number of plant louses and after a controlled time we determines the percentages dead of this parasite in order to obtaining the mortality according to time and dose of the synthetic product and of this oil. The comparison of the aphid mortality between the Malyphos product and the vegetable oil made it possible to reveal the role of this natural extracts on the limitation of manpower of these parasites and their possible use as plant health naturalness without side-effect on the human health and the environment.
Keywords— aphid, chemical, insecticide, malyphos, mortality, Neem, vegetable.
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