Biological Parameters of Habrobracon hebetor (Hymenoptera: Braconidae) on Different Lepidopteran Host Species

Abstract

The efficiency of Habrobracon hebetor as a biological control agent is strongly influenced by host suitability, particularly when reared on different lepidopteran species. The present study evaluates the biological parameters of H. hebetor when reared on multiple host species under controlled laboratory conditions to determine host-dependent variations in development, survival, and reproductive performance. Experimental rearing was conducted using larvae of key lepidopteran hosts, and parameters including developmental duration, pupation rate, adult emergence, fecundity, longevity, and sex ratio were recorded. Results revealed significant differences in biological performance of H. hebetor across host species. Shorter developmental periods and higher survival rates were observed when the parasitoid was reared on nutritionally suitable hosts, while suboptimal hosts resulted in prolonged development and reduced adult emergence. Fecundity and adult longevity were also significantly influenced by host quality, with higher reproductive output recorded on preferred host species. Sex ratio analysis indicated a female-biased population under optimal host conditions, enhancing the biological control potential of the parasitoid. Host-dependent variation in biological parameters suggests differences in nutritional suitability and physiological compatibility among lepidopteran species. These findings highlight the importance of host selection in mass rearing programs aimed at augmentative biological control. The study demonstrates that H. hebetor exhibits strong adaptability but performs optimally on specific lepidopteran hosts, emphasizing the need for careful host–parasitoid matching in biological control strategies. Overall, the results provide valuable insights for improving mass rearing efficiency and field release success of H. hebetor in integrated pest management programs targeting lepidopteran pests in agricultural ecosystems.