STUDY OF THE BIOECOLOGY OF Tuta absoluta MEYRICK (LEPIDOPTERA, GELECHIIDAE) IN THE REGION OF OUARGLA (SEPTENTRIONAL SAHARA, ALGERIA)

Abstract

The study of pests of the bio destructive Tuta absoluta (Meyrick) under greenhouse tomato in the region of Hassi Ben Abdallah (31 ° 59 'N, 5 ° 26' E.) in Ouargla by pheromone traps showed that the global dynamics of populations T. absoluta 5 shows the difference in successive generations of six months is the growth cycle of tomato. There were a maximum of 765 individuals, 912 and 245 respectively in the three greenhouses studied in I .T.D.A.S. The life cycle of T. absoluta in tomato plants (T: 34 ° C H%: 50 - 60%) lasts 23.85 days: egg (6 d), L1 (3.25 d), L2 (2.7 d), L3 (2.15 d), L4 (1d) and 8.75 days the chrysalis. This pest has caused losses of up to 100% in leaves and fruits of two varieties of tomato Zahra and Nedjma in February. The infestation in Nedjma is more important than Zahra.