Development of integrated pest management approaches against Helicoverpa armigera (Hubner) in tomato

AKM Z Rahman, MA Haque, SN Alam, K Begum, D Sarker
2016 Bangladesh Journal of Agricultural Research  
<p>Five IPM packages viz. T<sub>1</sub>=Pheromone trap @ 70 traps ha<sup>-1</sup> + Neem seed kernel extract @ 50 g L<sup>-1</sup> of water; T<sub>2</sub>=Pheromone trap + HaNPV @ 0.4 ml L<sup>-1</sup> of water and Bt @ 2.0 g L<sup>-1</sup> of water; T<sub>3</sub>=Pheromone trap + Neem seed kernel extract + HaNPV and Bt; T<sub>4</sub>=Pheromone trap + Trichogramma chillnis @ 50,000 ha<sup>-1</sup> and Bracon hebetor @ 1200 ha<sup>-1</sup>; T<sub>5</sub>=Pheromone trap + Neem seed kernel extract
more » ... seed kernel extract + T. chilonis and B. hebetor were evaluated against H. armigera in tomato. The lowest fruit infestation by number (12.55%) was attained from T<sub>5</sub> followed by T<sub>2</sub> (15.49%). Significantly the lowest fruit infestation by weight was found in treatment T<sub>2</sub> (10.60%) followed by T<sub>5</sub> (11.73%). The highest yield was obtained from T<sub>5</sub> (29.74 t ha<sup>-1</sup>) followed by T<sub>2</sub> (26.77 t ha<sup>-1</sup>). The highest marginal benefit cost ratio was achieved from T<sub>2</sub> (3.41) followed by T<sub>5</sub> (3.35). Hence, considering benefit cost ratio, T<sub>2</sub> and T<sub>5</sub> packages may be the effective tools for managing H. armigera in tomato.</p><p>Bangladesh J. Agril. Res. 41(2): 287-296, June 2016</p>
doi:10.3329/bjar.v41i2.28231 fatcat:grbd2aa3cfefvpeoorkk36n5xm