Effects of the Milling Degree of Rice and Storage Volume on the Interaction Between Plodia interpunctella (Lepidoptera: Pyralidae) and Its Parasitoid Bracon hebetor (Hymenoptera: Braconidae)
2005
Yoon, E.Y. (Korea University, Seoul, Republic of Korea) | Nam, Y.W. (Korea University, Seoul, Republic of Korea) | Ryoo, M.I. (Korea University, Seoul, Republic of Korea), E-mail: [email protected]
The ability of Bracon hebetor Say, a larval parasitoid of certain stored product moths, to suppress a Plodia interpunctella (Hubner) population was studied in differing rice products. The larvae of P. interpunctella gathered on the topmost layer of the experiment cages filled with rice product (less than 3 cm in depth), and were rarely observed in deeper depths (deeper than 3 cm). Without P. interpunctella, B. heetor did not show a preference for any of the three types of milled rice products used. In rice flour, the searching behavior of B. hebetor for P. interpunctella was limited, apparently due to the thick webbing prouced by the moth larvae. B. hebetor suppressed P. interpunctella population successfully in cracked rice kernels, but failed to suppress the moth population in rice flour.
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