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	Authors Year Title Journal
37	Aljunid, S.F. 1991 Chordotonal organs on the antenna of the brown planthopper Nilaparvata lugens Stal (Homoptera: Delphacidae). Malaysian Applied Biology 20(1): 25–32.
69	Andrzejewska, L. 1991 Formation of Auchenorrhyncha communities in diversified structures of agricultural landscape. Polish Ecological Studies 17: 267-287.
90	Anufriev, G.A. 1991 A new genus of cicadas of the Delphacidae family (Homoptera, Auchenorrhyncha) from the north of the USSR. Zoologicheskii Zhurnal 70(9): 144–147.
91	Anufriev, G.A. 1991 New and little-known species of Cicadinea of the genus Metropis Fieb. (Homoptera, Cicadinea, Delphacidae). Kyrgyz Respublikasy Ilimder Akademiyasynyn Kabarlary Khimiya - Tekhnologiya Zhana Biologiya Ilimderi (3): 67–72 & 92. pdf
288	Bayryamova, V.K. 1991 Composition and distribution of the species from the family Issidae (Homoptera, Auchenorrhyncha) in Bulgaria. Acta Zoologica Bulgarica 41: 58-63. [Bulgarian with Russian and English summaries].
335	Bernhardt, K.-G. 1991 Zum Auftreten von Cicadetta montana Scopoli, 1772 (Homoptera - Auchenorrhyncha) bei Tecklenburg und Lengerich. Natur und Heimat 51: 77-78.
336	Bernhardt, K.-G. and K. Arnold. 1991 Zum Auftreten von Haematoloma dorsatum (Ahrens) und Graphocephala fennahi Young in den Räumen Münster und Osnabrück. Natur und Heimat 51: 75-77.
343	Bhathal, J.S. and G.S. Dhaliwal. 1991 Role of natural enemies in population dynamics of whitebacked planthopper, Sogatella furcifera (Horvath). Journal of Insect Science 4(1): 37-40.
344	Bhathal, J.S. and G.S. Dhaliwal. 1991 Studies on the population dynamics of the whitebacked planthopper and its natural enemies on rice. Indian Journal of Entomology 53(1: 134-140.
347	Bhathal, J.S., G.S. Dhaliwal, V.K. Dilawari. and G.L. Sadana. 1991 Predatory fauna associated with whitebacked planthopper in rice ecosystem in Punjab India. Plant Protection Bulletin (Faridabad) 42(3-4): 11-13.
380	Bornholdt, G. 1991 Auswirkungen der Pflegemaßnahmen Mahd, Mulchen, Beweidung und Gehölzrückschnitt auf die Insektenordnungen Orthoptera, Heteroptera, Auchenorrhyncha und Coleoptera der Halbtrockenrasen im Raum Schlüchtern. Marburger Entomologische Publikationen 2(6): 1-330.
389	Bosco, D. and A. Arzone. 1991 Indagini sui parassitoidi oofagi di Lindbergina aurovittata (Douglas) e L. spoliata (Horvàth) (Homoptera Auchenorrhyncha). Redia 74(1): 147-162.
418	Bourgoin, T. and J. Huang. 1991 Comparative morphology of female genitalia and the copulatory mechanism in Trypetimorphini (Hemiptera, Fulgoromorpha, Tropiduchidae). Journal of Morphology 207(2): 149-155. pdf
489	Caciagli, P. 1991 Effect of anaesthesia with carbon dioxide on vectoring ability and survival of the planthopper Laodelphax striatellus. Annals of Applied Biology 119(2): 257-264.
491	Caciagli, P. and A. Casetta. 1991 Effects of carbon dioxide anaesthesia on the ability of the planthopper Laodelphax striatellus to vector maize rough dwarf virus. Acta Phytopathologica et Entomologica Hungarica 26(1-2): 171-174.
534	Carver, M., G.F. Ross, and T.E. Woodward. 1991 Hemiptera (bugs, leafhoppers, cicada, aphids, scale insects, etc. In: I.D. Naumann, P.B. Crane, J.F. Lawrence, E.S. Neilsen, J.P. Spradbery, R.W. Taylor, M.J. Whitten, and M.J. Littlejohn, (eds). The Insects of Australia, a textbook for students and research workers. Vol. 1. Melvourne University Press Pp. 429-509.
550	Chang, Y.D., Y.-S. Yeo, and Y.-H. Kim. 1991 Host finding, mating behavior and their reproduction mode of Anagrus incarnatus Haliday. Korean Journal of Applied Entomology 30(2): 101-105. pdf
579	Chen, C.C. 1991 The plant diseases transmitted by the leafhoppers and planthoppers in Taiwan. Chinese Journal of Entomology Special Publication. 7: 139-156.
628	Cheng, C.L. and C.T. Yang. 1991 A new species of Ecapelopterum of Taiwan (Homoptera: Issidae). Chinese Journal of Entomology 11(3): 228-230.
629	Cheng, C.L. and C.T. Yang. 1991 Nymphs of Issidae of Taiwan (3) (Homoptera). Plant Protection Bulletin (Taiwan) 33(4): 323-333.
630	Cheng, C.L. and C.T. Yang. 1991 Nymphs of Issidae of Taiwan (Homoptera). Chinese Journal of Entomology 11(3): 232-241. pdf
642	Cheng, X.N. and G.M. Xu. 1991 Comparison of population ecology between two mymarid egg parasitoids of rice planthoppers. Acta Entomologica Sinica 34(4): 405-412.
797	Cook, A.G. 1991 Methods to evaluate the variability of rice leafhopper and planthopper populations. In: E.A. Heinrichs and T.A. Miller, (eds.). Rice Insects: Management Strategies. Springer, New York. Pp. 215-233
5029	della Giustina, W. and R. Remane. 1991 La faune de France des Delphacidae (Homoptera, Auchenorrhyncha). 3 - Recoltes et identifications 1991. Cahiers des Naturalistes 47(3): 49-60. pdf
960	Denno, R.F., G. K. Roderick, G.K. and K.L. Olmstead. 1991 Density-related migration in planthoppers (Homoptera: Delphacidae): the role of habitat persistence. American Naturalist 138(6): 1513-1541. pdf

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