Adult Emergence Holes Research Articles

Ability of ovipositing Callosobruchus maculatus (Fabricius) (Coleoptera: Bruchidae) females to discriminate between seeds with differing numbers of emergence holes

Previous work has shown that eggs or egg covers and an egg marking pheromone on legume seeds act as deterrence cues for ovipositing females of Callosobruchus maculatus (F.). This study demonstrates that females may also discriminate between seeds with differing numbers of adult emergence holes. In no-choice tests, females laid more eggs on seeds with no hole or few holes than on seeds with many holes. Similarly, in choice tests, seeds bearing no holes or few holes were preferred for oviposition to those bearing greater number of holes.

Spatial Distribution Pattern of the Sugi Bark Borer, Semanotus japonicus LACORDAIRE (Coleoptera : Cerambycidae), on Japanese Cedar Trees

The spatial distribution pattern of Semanotus japonicus populations on living cedar trees is described. The m-m^* regression method of analysis was used. Starting points of larval gallery (SPLG) in outer bark and adult emergence holes (AEH) were distributed contagiously between trees. On sampled bolts 50 cm long, and on the bolt surface, the distribution patterns of SPLG and AEH were also contagious.