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Adult Morphological Measurements: An Indicator to Identify Sexes of Japanese Pine  

이상명 (남부산림연구소)
정영진 (국립산림과학원 산림병해충과)
김동수 (남부산림연구소)
최광식 (국립산림과학원 산림병해충과)
김영걸 (남부산림연구소)
박정규 (경상대학교 농업생명과학원)
Publication Information
Korean journal of applied entomology / v.43, no.1, 2004 , pp. 85-89 More about this Journal
Abstract
Numerical measurements were made for fresh weight, body length and width, head width, and color and length of antenna of Japanese pine sawyer, Monochamus alternatus adults, a primary vector of pine wood nematode, Bursaphelenchus xylophilus in Korea. We measured 563 females and 601 males that emerged out of dead pine logs from 2001 to 2002. General linear model analysis showed that measurements of fresh weight, body length, and body width were significantly higher in females than in males. Head width was not significantly different between sexes. Antennal length of males was significantly longer than that of females. For females and males respectively, average fresh weights were 0.305g and 0.277g, body lengths 20.97mm and 19.93mm, body widths 6.52mm and 6.18mm, head widths 3.78mm and 3.70mm, and antennal lengths 31.19mm and 45.49 mm. Antennal length or ratio of antennal length to body length overlapped in some ranges between 2 sexes. Therefore antennal length itself or ratio of antennal length to body length could not be used as a definite criterion to discriminate sexes. However, check on color of the antennae of 4,033 adults revealed without exception that basal part of every segment of flagellum of female antenna was covered with whitish-grey hairs, while whole part of every segment of male flagellum was covered with brownish-black hairs. This characteristics might be a best way to differentiate sex of this species.
Keywords
Japanese pine sawyer; Monochamus alternatus; Pine wood nematode; Bursaphelenchus xylophilus; Numerical measurement; Sex discrimination;
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