Open AccessEFFECT OF INUNDATIVE RELEASE OF TRICHOGRAMMA CHILONIS AGAINST HELICOVERPA ARMIGERA (HUBNER)(LEPIDOPTERA: NOCTUIDAE) ON YIELD OF PEA CROP
Author(s) -
Rahim Jan,
Bhai Khan Solangi,
Muhammad Azim Bizenjo,
Saima Q. Memon,
Zahoor Ahmed Pandran,
Ali Asghar Gola,
Maqbool Ahmed jatoi,
Aminullah Aminullah,
Muhammad Haroon,
Abdul Wahab
Publication year - 2021
Publication title -
pakistan journal of biotechnology
Language(s) - English
Resource type - Journals
eISSN - 2312-7791
pISSN - 1812-1837
DOI - 10.34016/pjbt.2021.18.2-3.49
Subject(s) - helicoverpa armigera , population , bollworm , biology , lepidoptera genitalia , noctuidae , helicoverpa , biological pest control , veterinary medicine , toxicology , horticulture , botany , larva , medicine , environmental health
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 9th 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.