ISSN 2360-7971
This study evaluated the growth and yield performance of peanut varieties subjected to different pest control strategies during wet-season cropping. Specifically, it aimed to (1) determine varietal performance in terms of yield and growth; (2) identify the highest-yielding variety under wet-season conditions; (3) determine the most effective biological pest control strategy and frequency of application; (4) assess the efficacy of control strategies against major defoliating insect pests; and (5) conduct production economic analysis of peanut production under the different treatments. A two-factor factorial experiment arranged in a randomised complete block design (RCBD) with three replications was employed. Factor A included three peanut varieties: farmers’ variety (Ilocos Red), NSIC Pn9, and NSIC Pn12. Factor B comprised eight pest control strategies: control (no application), chemical insecticide, three application schedules of Trichogramma, and three schedules of Metarhizium anisopliae. Results revealed significant varietal differences in emergence, flowering, peg formation, vine length, and biomass. NSIC Pn9 consistently exhibited earlier phenological development, while NSIC Pn12 showed superior biomass and seed size. Pest incidence across all treatments remained very low, with damage indices indicating high resistance. Economic analysis indicated that NSIC Pn9 applied with Trichogramma once at the vegetative stage yielded the highest net income and benefit–cost ratio. The findings indicate that NSIC Pn9, applied with a single Trichogramma release, is the most profitable combination for wet-season peanut production. The study recommends further validation under dry-season conditions to strengthen conclusions.
Keywords: peanut varieties, biological control agents, Trichogramma, Metarhizium, wet-season cropping, pest management.