LA COMPARAISON ENTRE L EFFICACITE DE DEUX PRODUITS CHIMIQUE ABAZMICTINE ET PROACT SUR LA MINEUSE DE LA TOMATE TUTA.ABSOULMUTATDANS LA REGION DE MOSTAGANEM

Abstract

Tuta absoluta (Meyrick, 1917) is an insect pest of crops whose larvae are capable of causing extensive damage to infested plants, causing losses of up to 100% of the crop. Its host, mainly a Solanaceae, can be tomatoes, potatoes and even some wild species. This microlepidopteran from South America quickly spread to today infest the entire Mediterranean basin. It is in this context and for these reasons that we have made our contribution to the study of thebioecology and population dynamics of T. absoluta by laboratory and greenhouse observations and pheromone trapping in the field. efficacy testing of two isectecide treatments against this leafminer. In the laboratory, this study allowed us to study some biological parameters of T. absoluta by comparing the development durations of the different stages of insect development as well as the mortality rates of each life-history stage. two active substances (The study of the dynamics of the populations highlighted the succession of four phynological stages during the study period from December to March, the first damage appeared at the first places at the level of the nursery. also observed in all vegetative stages of the crop, and as the frequency of attack of the crop increased, the damage became visible on the plants and fruits. Finally, we confirmed the effectiveness of two basic formulation of different active ingredients of insecticides (proacte and abamictine) on the larval populations of tomato leafminer Tuta absoluta. Statistical analyzes show that the 1.5ml / 2l dose forms only one group with a mean of the leaf blasses two days after the application of both treatment and another group with 53.61% after four days We suggest the combination of efforts of researchers to find reasonable solutions to this important pest that threatens agriculture; further work will undoubtedly address these concerns.