EFFECT OF INUNDATIVE RELEASE OF TRICHOGRAMMA CHILONIS AGAINST HELICOVERPA ARMIGERA (HUBNER)(LEPIDOPTERA: NOCTUIDAE) ON YIELD OF PEA CROP.

Jan, Rahim; Solangi, Bhai Khan; Bizenjo, Muhammad Azim; Memon, Shafique Ahmed; Pandran, Zahoor Ahmed; Gola, Ali Asghar; jatoi, Maqbool Ahmed; Aminullah; Haroon, Muhammad; Wahab, Abdul

The present study was conducted at ARI Quetta during the year 2018, to know the outcome of egg parasitoid (Trichogramma chilonis) against Helicoverpa armigera and spotted bollworm complex. The observations were recorded on a weekly basis population of Helicoverpa armigera and spotted bollworm under control and biological control plots. The reduction percentage and crop yield were also calculated. Spotted bollworm maximum population in control plot were counted in the second week (15.82±2.48) and the minimum population was observed in the sixth week (12.56±1.53b) during ten weeks respectively. Spotted bollworm population in biological plot (Trichogramma chilonis) maximum population was observed (10.90±1.61) during 1 week and least population was observed in a tenth week (8.12±0.32) in the treated plot. Helicoverpa armigera population in control plot maximum population was counted (16.74±2.23) during 9th week and minimum population was observed (13.54±1.75 b) during 10 weeks duration, respectively. Helicoverpa armigera population in biological plot (Trichogramma chilonis) maximum population was counted (11.90±1.72a) and the minimum population was observed (9.08±0.33d) during 10 weeks of duration, respectively. Statistical analysis indicates that there was no significant variation in spotted bollworms and Helicover paarmigera population for control plot in all weeks, but significant variation in a population of both lepidopteran complexes in biological control (Trichogramma chilonis) plot in all weeks. The data indicates that 61.33% and 66.57% reduction was observed in spotted bollworms and Helicoverpa armigera under biological control (Trichogramma chilonis). It was noted that Trichogramma chilonis is a valuable biological agent for the Integrated Pest Management program.

QUETTA (Pakistan); HELICOVERPA armigera; TRICHOGRAMMA; CROP yields; NOCTUIDAE; LEPIDOPTERA

Pakistan Journal of Biotechnology, 2021, Vol 18, Issue 3/4, p49

1812-1837

Academic Journal

10.34016/pjbt.2021.18.2-3.49