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http://dx.doi.org/10.5656/KSAE.2010.49.1.017

Ecological Study of Pachynematus itoi Okutani (Hymenoptera: Tenthredinidae)  

Park, Ji-Doo (Division of Forest Insect Pests and Diseases, Korea Forest Research Institute)
Park, Il-Kwon (Division of Forest Insect Pests and Diseases, Korea Forest Research Institute)
Publication Information
Korean journal of applied entomology / v.49, no.1, 2010 , pp. 17-22 More about this Journal
Abstract
Pachynematus itoi Okutani emerges three times a year, and overwinters as a pre-pupa in cocoon. First emergence of P. itoi was from 7th May to third June. Second and third emergence was from 20th June to 13th July and fourth to 25th August, respectively. Mean oviposited egg number was 59, and egg period was about 9 days. Hatching rate was >90%. Oviposited egg number was the highest in the first needle cluster of short shoot followed by second and third. P. itoi did not oviposit on single needle (long shoot) of Larix leptolepis (Sieb. et Zucc.). Larva had five instars, and larval period was about 20 days. Larva prefer needle cluster of short shoot to single needle of long shoot. Mature larva descended from host tree and pre-pupa in cocoon overwinter at topsoil.
Keywords
Pachynematus itoi Okutani; Larix leptolepis Sieb. et Zucc.; Biological characteristic; Emergence; Oviposition;
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1 Park, J.D., J.W. Lee, I.K. Park, C.S. Kim, S.G. Lee, S.C. Shin, Z. Yang, M. Sheng, M.J. Jeon and B.K. Byun. 2007b. The first record of Endasys liaoningensis (Hymenoptera: Ichneumonidae) parasiting on Pachynematus itoi (Hymenoptera: Tenthredinidae) in Korea. J. Asia Pac. Entomol. 10: 297-299.   DOI
2 Sheng, M., L. Gao and J. Wang. 1998. Studies on the parasitoids of Pachynematus itoi: I. Cleptes semiauratus and Endasys liaoningensis. Forest Pest & Dis. 2: 7-8.
3 Sheng, M., L. Gao, S. Sun, Y. Zhang, H. Zhang, J. Huang and H. Zhang. 2002. Studies on the parasitoids of Pachynematus itoi and their control abilities. J. Liaoning Forestry Sci. & Technol. 2: 1-3.
4 Takizawa, Y. 1957. Studies on a Japanese-sawfly Pachynematus itoi Okutani (Tenthredinidae, Hymenoptera). II. The Ecology and its life history. New Entomol. 6: 17-29.
5 Wagner, M.R., T. Ikeda, D.M. Benjamin and F. Matsumura. 1979. Host derived chemicals: the basis for preferential feeding behavior of the larch sawfly, Pristiphora erichsonii (Hymenoptera: Tenthredinidae), on tamarack, Larix laricina. Can. Entomol. 111: 165-169.   DOI
6 Wang, G., J. Sun, S. Ma and M. Sheng. 1996. A new species of Endasys Foerster (Hymenoptera: Ichneumonidae) parasiting Pachynematus itoi Okutani (Hymenoptera: Tenthredinidae). Entomotaxonomia 18: 230-232.
7 Xiao, G. 1992. Forest Insects of China the second edition (revised & enlarged). 1362pp. China Forestry Publishing House, Beijing.
8 Korea Forest Service. 2006. Statistical Yearbook of Forestry. 482pp. Korea Forest Sevice, Daejeon.
9 All, J.N. and D.M. Benjamin. 1975. A feeding preference bioassay for Neodiprion sawflies on jack pine, Pinus banksiana. Ann. Entomol. Soc. Am. 68: 553-556.   DOI
10 Kobayashi, F. and A. Taketani. 1994. Forest Insects. 567pp. Yogendo, Tokyo.
11 Lee, B.Y. and Y.J. Chung. 1997. Insect pests of trees and shrubs in Korea. 459pp. Seongandang, Seoul.
12 Okutani, T. 1955. A new larch-sawfly from Japan. (Studies on Symphyta III). Akitu 4: 98-100.
13 Park, J.D., A. Shinohara, I.K. Park, S.C. Shin and B.K. Byun. 2007a. Discovery of Pachynematus itoi Okutani (Hymenoptera: Tenthredinidae) infestated on Larix kaempferi (Lamb.) Carriere from Korea. Kor. J. Appl. Entomol. 46: 1-4.   DOI