Abstract:

In nature, the effects of foraging experience on Kerria yunnanensis offspring population were studied. With the same foraging experience, the offspring of K. yunnanensis had different population density on different host tree species. The realized sex ratio of offspring had significant difference between Ficus glomerata var. chittagonga and Dalbergia obtusifolia, but no significant difference between other host trees. The offspring population mortality had no difference (P＞0.05) between Ficus glomerata var. chittagonga and Dalbergia balansae, whereas it had significant difference (P＜0.05) between other host trees. There was extremely signifcant difference (P＜0.01) in oviposition of offspring female between Ficus glomerata var. chittagonga and Dalbergia balansae, between Ficus cunia and Dalbergia balansae, but there was no difference (P＞0.05) between Ficus glomerata var. chittagonga and Ficus cunia. R₀ had certain difference among all host trees. With different experience, the offspring of K. yunnanensis had the same population density on the same host tree species, had different realized sex ratio, population mortality and oviposition (P＜0.05). After one life cycle on Dalbergia balansae and Ficus cunia, the R₀ on Ficus cunia had no difference (P＞0.05), after one life cycle on Dalbergia balansae and Ficus glomerata var. chittagonga, the R₀ on Ficus glomerata var. chittagonga had extremely significant difference (P＜0.01).

Key words: Kerria yunnanensis, natural population, foraging experience, herbivoreplant interaction