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	Authors Year Title Journal
4472	Van Stalle, J. 1990 Neodiostrombus Muir, 1918 (Homoptera, Derbidae) with the description of four new species from New Guinea. Bulletin de l'Institut Royal des Sciences Naturelles de Belgique Entomologie 60: 185-189.
4473	Van Stalle, J. 1990 New species, a key and distribution of the genus Proutista (Homoptera, Derbidae) in New Guinea. Indo-Malayan Zoology 6(1): 101-118. pdf
4478	Varma, A., B.K. Tandan, and K. Singh. 1990 A new record of Entomophthora sp. (Zygomycotina: Entomophthorales) on sugarcane leaf hopper, Pyrilla perpusilla (Homoptera: Lophopidae) from Uttar Pradesh. Journal of Biological Control 4(2): 125-126.
4491	Velusamy, R., B. Thayumanavan, S. Sadasivamand S. Jayaraj. 1990 Effect of steam distillate extract of resistant wild rice Oryza officinalis on behavior of brown planthopper Nilaparvata lugens (Stal) (Homoptera: Delphacidae). Journal of Chemical Ecology 16(3): 809-817.
4593	Wais, A. 1990 Biologie und Ernährung von Zwergzikaden. Homoptera: Auchenorrhyncha) an Kartoffeln und deren Fähigkeit zur Übertragung des Kartoffel-Y-Virus (PVY). Thesis, University of Göttingen, Göttingen, Germany. Thesis
4607	Waloff, N. 1990 Superparasitism and multiparasitism of Cicadellidae and Delphacidae (Homoptera, Auchenorrhyncha). Entomologist 109(1): 47-52.
4662	Watanabe, T., H. Seino, C. Kitamura, and Y. Hirai. 1990 A computer program, LLJET, utilizing an 850 mb weather chart to forecast long-distance rice planthopper migration. Bulletin of the Kyushu National Agricultural Experiment Station 26(3): 233-260.
4678	Wei, Z.G. and S.H. Qin. 1990 A study on Eoeurysa flavacapitata Muir. Entomological Knowledge 27(2): 98–100. pdf
4828	Wu, G.R. 1990 Occurrence and present situation of the 'biotypes' of the rice brown planthopper. Entomological Knowledge 27(1): 47-51.
4834	Wu, J., B. Shen, and X. Pang. 1990 Quadratic regression rotation composite design and study on the effect of four species of spiders on the white-backed rice planthopper. Journal of South China Agricultural University 11(2): 16-24.
4846	Wu, Z.F., Y.J. Yan, and S.X. Zhao. 1990 Studies on the population dynamic simulation of brown planthopper. Journal of Fujian Agricultural College 19(2): 115-122.
4861	Xu, X.Y. and J.H. Ding. 1990 The ovarial structure and division of developmental stage of Laodelphax striatellusa [striatellus] Fallen. Entomological Knowledge 27(6): 365-366.
4868	Yamada, S. 1990 The relation of adult wing-form in the brown planthopper, Nilaparvata lugens Stal (Homoptera: Delphacidae) to wing-pad length of last instar nymphs. Applied Entomology and Zoology 25(4): 439-446. pdf
4903	Yeo, Y.S., Y.D. Chang, and K.M. Choi. 1990 Effect of temperature on the development of Anagrus incarnatus Haliday (Hymenoptera: Mymaridae). Korean Journal of Applied Entomology 29(4): 217-221. pdf
4904	Yeo, Y.S., Y.D. Chang, and H.G. Goh. 1990 A morphological observations of an egg parasitoid, Anagrus incarnatus Haliday (Hymenoptera: Mymaridae), of the rice planthoppers. Korean Journal of Applied Entomology 29(1): 1-5. pdf
4913	Yokomizo, K., N. Nanba, and Y.Ogawa. 1990 Local distribution pattern of immigrating rice planthoppers in Nagasaki Prefecture. Proceedings of the Association for Plant Protection of Kyushu 36: 85-89. pdf
4924	Yu, X.P. 1990 A technique for clear away insect eggs from rice plants used in planthopper rearing. Entomological Knowledge 27(4): 236-237.
4953	Zeigler, R.S. and F.J. Morales. 1990 Genetic determination of replication of rice hoja blanca virus within its planthopper vector, Sogatodes oryzicola. Phytopathology 80(6): 559-566. pdf
4973	Zhang, J.X., et al. 1990 Studies on the reproductive behavior of Sogatella furcifera (Horvath). Entomological Knowledge 27(5): 260-263.
5003	Zhu, M.H. and M.R. Tian. 1990 Studies on population dynamics of Sogatella furcifera (Horvath). Entomological Knowledge 27(5): 257-260.
5008	Zhu, Z.R., J.A. Cheng, and X. Chen. 1990 Functional response to host density and mutual interference of Anagrus nilapavatae [nilaparvatae] (Hymenoptera, Mymaridae), an egg parasitoid of the rice planthoppers. Natural Enemies of Insects 12(2): 51-55.
5073	Ammar, E.D., R.E. Gingery, D.T. Gordon, and A.E. Abol-Ata. 1990 Tubular helical structures and fine filaments associated with the leafhopper-borne maize yellow stripe virus. Phytopathology 80: 303-309. pdf
5091	Cheng, J.A., G.A. Norton, and J. Holt. 1990 A systems analysis approach to brown planthopper control on rice in Zhejiang Province, China. II. Investigation of control strategies. Journal of Applied Ecology 27(1): 100-112. pdf
5339	Wang, S.Z., J. Huang, and J.Z. Song. 1990 Notes on the Catonidia from China (Homoptera: Achilidae). Acta Agriculturae Boreali-Sinica 5(4): 120–123. pdf
5474	Yang, J.T. and C.T. Yang 1990 The male genitalia of two Achilidae from Taiwan (Homoptera: Fulgoroidea). Bulletin of the Society of Entomology National Chung Hsing University 23: 57-61.

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