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

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

doi:10.34016/pjbt.2021.18.2-3.49

Authors

Rahim Jan 1Department of Entomology
Bhai khan solangi Department of Entomology
Muhammad Azim Bizenjo Agriculture Research Institute Balochsitan Quetta-Pakistan
Shafique Ahmed Memon Facuty of Agriculture University of LUAWMS Uthal,Balochistan, Pakistan.
Zahoor Ahmed Pandran Department of Agriculture Extension
Ali Asghar Gola Facuty of Agriculture University of LUAWMS Uthal
Maqbool Ahmed jatoi Agriculture Research Institute Balochsitan Quetta-Pakistan.
Aminullah Department of Agriculture Extension,Water Mangement-Balochsitan-Pakistan.
Muhammad Haroon Agriculture Research Institute Balochsitan Quetta-Pakistan.
Abdul Wahab Facuty of Agriculture University of LUAWMS Uthal

DOI:

https://doi.org/10.34016/pjbt.2021.18.2-3.49

Keywords:

effect, release , Trichograaaa, Helicoverpa, Peas, crops.

Abstract

The present study was conducted at ARI Quetta during the year 2018, to know the outcome of egg parasitoid (Trichogrammachilonis) against Helicoverpaarmigera and spotted bollworm complex. The observations were recorded on the weekly basis population of Helicoverpaarmigera and spotted bollworm under control and biological control plots. The reduction percentage and crop yield was also calculated. Spotted bollworm maximum population in control plot was counted in second week (15.82±2.48) and minimum population was observed in sixth week (12.56±1.53b) during ten weeks respectively. Spotted bollworm population in biological plot (Trichogrammachilonis) maximum population was observed (10.90±1.61) during 1 weeks and least population was observed in tenth week (8.12±0.32) in treated plot. Helicoverpaarmigera population in control plot maximum population was counted (16.74±2.23) during 9^th week and minimum population was observed (13.54±1.75 b) during 10 weeks duration, respectively. Helicoverpaarmigera population in biological plot (Trichogrammachilonis) maximum population was counted (11.90±1.72a) and 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 Helicoverpaarmigera population for control plot in all weeks, but significant variation in population of both lepidopteran complexes in biological control (Trichogrammachilonis) plot in all weeks.

The data indicates that 61.33% and 66.57% reduction was observed in spotted bollworms and Helicoverpaarmigeraunder biological control (Trichogrammachilonis). It was noted that Trichogrammachilonis is valuable biological agent for Integrated Pest Management program.