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	Authors Year Title Journal
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
1026	Ding, J.H. and C.L. Hu. 1991 Notes on male Neobelocera zhejiangensis (Zhu) comb. nov. (Homoptera: Delphacidae). Acta Entomologica Sinica 34(2): 250.
1030	Ding, J.H. and J. Wang. 1991 The discovery of the male of Terauchiana yasumatsui Esaki et Ishihara. Journal of Nanjing Agricultural University [Nanjing Nongye Daxue Xuebao] 14(1): 105-106. pdf
1033	Ding, J.H. and W. Zhuo. 1991 A new genus and two new species of Delphacidae [delphacids] from Wuyishan Nature Reserve of Fujian (Homoptera: Fulgoroidea). Wuyi Science Journal 8: 33-36. pdf
1039	Ding, J., F. Zhang, C. Hu and J. Wang. 1991 Three new records of the genus Javesella Fennah (Homoptera: Delphacidae) from China. Entomotaxonomia 13(2): 151-155.

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