Journal of Applied Biosciences (J. Appl. Biosci.) [ISSN 1997 - 5902]
Volume 46: 3120 - 3123. Published October 28, 2011.
Integrated control of bollworm Helicoverpa armigera (hub.) (Lep. Noctuidae) in cotton fields of Golestan province, northern Iran
Mojeni Taghi Darvish* and Ghasemi Bezdi Kamal
Cotton Research Institute of Iran (CRII), Beheshti St., P.O.Box 49175-483, Gorgan, I.R.IRAN.
ABSTRACT
Objective: Helicoverpa armigera (Hub.) is the major pest of cotton in Golestan province, Iran. The present study was carried out during 2002-2003 in Fazel-Abad region of Iran to compare the efficacy of different control measures for managing this pest.
Methodology and results: The treatments were: 1) releasing of Trichogramma brassicae (Bez.) twice (2gr/ha/release); 2) combined release of T. brassicae (as above) + Habrobracon hebetor (Say.) (1000 adults/ha); 3) integration of T. brassicae + B.T.H (2 kg/ha); 4) integration of T. brassicae + H. hebetor + B.t.H (2 kg/ha); 5) application of Endosulfan 35% (3 lit/ha); and 6) untreated check. Sampling was done one day before and 3, 5, 7, 10 and 15 days after treatment. Ten plants were chosen randomly in each plot. Life stages of H. armigera, parasitoid eggs and larvae as well as the percentage of infested fruiting part of cotton were counted. The mortality was calculated using Abbott formula. The results indicated that there were significant differences among treatments at (p<0.05). The integration of T. brassicae + H. hebetor + B.t.H with 97.57% H. armigera mortality and 0.95% infested fruiting part; and treatment with T. brassicae + B.t.H with 92.98% H. armigera mortality and 0.98% infested fruiting part had the best performance was the least effective. .
Conclusion and application of results: It is concluded that integration of biological control + bio-pesticide (B.t.H) could be a suitable method for integrated control of Helicoverpa armigera (Hub.).
Key words: Integrated control, Helicoverpa armigera (Hub.), Cotton, Iran, B.t.H., Endosulfan
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