Seasonal Occurrence and Age Structure of Paromius exiguus (Distant) (Heteroptera: Lygaeidae) on Major Host Plants

흑다리긴노린재[Paromius exiguus (Distant)](Heteroptera: Lygaeidae)의 발생소장과 주요 기주에서 시기별 연령분포

  • Park, Chang-Gyu (Applied Entomology Division, Department of Agricultural Biology, National Academy of Agricultural Science) ;
  • Park, Hong-Hyun (Applied Entomology Division, Department of Agricultural Biology, National Academy of Agricultural Science) ;
  • Uhm, Ki-Baik (Applied Entomology Division, Department of Agricultural Biology, National Academy of Agricultural Science) ;
  • Lee, Joon-Ho (Entomology Program, Department of Agricultural Biotechnology, Seoul National University)
  • 박창규 (국립농업과학원 농업생물부 곤충산업과) ;
  • 박홍현 (국립농업과학원 농업생물부 곤충산업과) ;
  • 엄기백 (국립농업과학원 농업생물부 곤충산업과) ;
  • 이준호 (서울대학교 농생명공학부 곤충학)
  • Published : 2009.03.30


Paromius exiguus (Distant) has caused serious damage by pecky grains around Gimpo paddy fields in 2001. We conducted field and laboratory studies to determine the seasonal occurrence and age distribution of P. exiguus on the three major host plants. The overwintering P. exiguus was found mainly on the basal part of gramineae weeds in various localities. After overwintering, in mid-May, the adults aggregated on the grain parts of Imperata cylindrica, laid their eggs and nymphs developed into adults on the same host plants. By the time, the Calamagrostis epigeios colony had newly occupied I. cylindrica areas, the nymphs and adults of first generation had already moved to the second host. The second generation of P. exiguus, after having completed its life cycle on C. epigeios, the newly emerged adults migrated to the rice plants and other gramineae weeds in early August. Afterwards, they complete its third generation cycle where they can move to the overwintering site again. P. exiguus has the five nymphal stages and each nymphal stage could be determined by head or prothoracic width. On the I. cylindrica and O. sativa hosts, the age distribution of P. exiguus showed a simple structure as each stage ratio increased stepwise with time. But in case of C. epigeios, as the newly emerged adults and immature nymphs continuously migrate after a month from the I. cylindrica, the age structure became remarkably complex. The peak nymphal density was observed when the ratio of third and forth instar was the highest in the population. The finding about the specific age structure on each generation of the insect would be very useful in control decision making on the major host plants. It is also important to consider the host's specificity to pesticide sensitivity in relation to various nymphal stages.


  1. Dyar, H.G. 1890. The number of molts of lepidopterous larvae, Psyche (Cambr.) 5: 420-422
  2. Lee, K.Y., K.S. Ahn, H.J. Kang, S.K. Park and T.S. Kim. 2001. Host plants and life cycle of rice black bug Scotinophara lurida Bürmeister (Hemiptera: Pentatomidae). Korean J. Appl. Entomol. 40: 309-313
  3. Cho, S.S., M.J. Han and J. S. Yang. 1991. Occurrence of bug species around paddy field and pecky rice. Korean J. Appl. Entomol. 30: 58-64
  4. Choi, K.M. 1987. Ecology and control of the pests causing the pecky rice. Textbook of Crop Protection for Expert Training Course. RDA. 64-76
  5. Paik, C.H., M.Y. Choi, H.Y. Seo, G.H. Lee and J.D. Kim. 2007. Stink bug species and host plants occurred in fallow lands for rice product regulation. Korean J. Appl. Entomol. 46: 221-227
  6. Han, S.C. 1987. The rice stink bug causing the pecky rice and control. The Research and Extension 28: 29-31
  7. Takimoto, M., T. Asayama, Y. Isogawa, T. Nakagome, S. Katou and Y. Uebayasi. 1989. Ecology and chemical control of Paromius exiguus Distant (Heteroptera: Lygaeidae). Res. Bull. Aichi Agric. Res. Ctr. 21: 69-77
  8. Goh, H.G., Y.H. Kim, Y.I. Lee and K.M. Choi. 1988. Species and seasonal fluctuation of rice ear injurious bugs and pecky rice. Research Report of RDA (C.P) 30: 47-51
  9. Lee, K.Y., S.K. Park, K.S. Ahn and B.R. Choi. 2004. Overwintering site and seasonal occurrence of the rice black bug Scotinophara lurida Bürmeister (Hemiptera: Pentatomidae) in the rice paddy field. Korean J. Appl. Entomol. 43: 291-296

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