논문 상세보기
Studies on the Morphological and Developmental Characteristics of Mycophagous Ladybird Illeis koebelei Timberlake, 1943 (Coleoptera: Coccinellidae: Psylloborini)
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/289632
Although the greater part of Coccinellidae are all pure entomophagous insects (Weber and Lundgren, 2009), many species of phytophagous, mycophagous and polyphagous ladybirds have been reported in worldwide. This study was conducted to investigate the morphological characteristics of mouthparts of mycophagous ladybird, I. koebelei, comparison with aphidophagous species, Propylea japonica (Coccinellidae: Coccidellini), and developmental charicteristics of I. koebelei at different temperature under incubation conditions. Four species of powdery mildews that I. koebelei fed were observed, and their host plants were pear tree, persimmon tree, red pepper and cucumber. The most conspicuous elements of I. koebelei mouthparts is the mandible. The distal incisor region of the mandible of both species is formed by two teeth, giving them a bifid apex. and the terminal teeth spilt near top and the ventral tooth is smaller than the dorsal one. but the ventral tooth of I. koebelei divided into a row of additional teeth was different with P. japonica. Furthermore, while the inner mandibular cutting edge of P. japonica is smooth, that of I. koebelei is covered in minute teeth, forming a comb. These structures are presumed to help I. koebelei rake fungal spores growing on leaf surface. The developmental period and reproduction ability of were significantly different according to temperature conditions when I. koebelei was fed the powdery mildew from cucumber leaves. The optimum temperature for I. koebelei rearing was from 23 to 25℃ that is the similar condition of cucumber powdery mildew occurrence.
