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	Authors Year Title Journal
11441	Metcalfe, J.R. 1971 Observations on the ecology of Saccharosydne saccharivora (Westw.) (Hom., Delphacidae) in Jamaican sugar-cane fields. Bulletin of Entomological Research. 60(4): 565-597. doi:10.1017/S0007485300042334.
8365	Rajendram, G.F. and D.J.E. Daniel. 1986 Observations on the biology of Nilaparvata lugens (Homoptera: Delphacidae). Vingnanam [Journal of Science] 1(1): 8-13.
3830	Riley, J.R., D.R. Reynolds, A.D. Smith, L.J. Rosenberg, X-n. Cheng, X-x Zhang, G-m. Xu, J-y. Cheng, A-d. Bao, B-p. Zhai,and H-k. Wang. 1994 Observations on the autumn migration of Nilaparvata lugens (Homoptera: Delphacidae) and other pests in east central China. Bulletin of Entomological Research 84(3): 389-402.
1736	Gerard, P.J. 1992 Observations on superparasitism in a natural population of Centrodora scolypopae (Hymenoptera: Aphelinidae). New Zealand Entomologist 15: 32-38. pdf
3194	Mishra, R.K. 1981 Observations on some aspects of digestive physiology of Nisia atrovenosa Leth. (Derbidae: Fulgoroidea). Comparative Physiology and Ecology 6(4): 225-228.
2090	Hirao, J. and K. Ito. 1980 Observations on rice planthoppers collected over the East China Sea in June and July, 1974. Japanese Journal of Applied Entomology and Zoology 24(2): 121-124. pdf
9360	Wan, M.T.K. 1972 Observations on rice leaf and planthoppers in Sarawak (Malaysian Borneo). Malaysian Agricultural Journal 48(4): 308-335.
11303	Ramachandran Nair, K. 2002 Observations on Proutista moesta (Westw.) (Homoptera: Derbidae), the vector of palm diseases in Kerala State, India. The Planter 78: 619-625.
4907	Ye, Z.Z., et al. 1981 Observations on migration of Nilaparvata lugens Stal. Entomological Knowledge 18(3): 97-100.
9338	Soehardjan, M. 1973 Observations on leaf- and planthoppers on rice in West Java. Contributions, Central Research Institute for Agriculture, Bogor 3: 10 pp.
10086	Li, M.Y., H.F. Lin, L. Jin, and S.Y. Zhang. 2011 Observations on infection of Nilaparvata lugens by Metarhizium flavoviride using a scanning electron microscope. Journal of Applied Entomology 48(5): 1412-1416. [Chinese]
6965	Weaving, A.J.S. 1980 Observations on Hilda patruelis Stal. (Homoptera, Tettigometridae) and its infestation of groundnut crops in Rhodesia. Journal of the Entomological Society of Southern Africa 43: 151-157.
11317	Whitehead P.F. and R.S. Key. 2010 Observations on British Issus (Hemiptera, Issidae) with reference to development, periodicity and ecology. Worcestershire Record 29: 22-27. pdf
7840	Choo, H.Y. 1988 Observations on Agamermis unka (Mermithidae), a nematode parasite of brown planthopper Nilaparvata lugens. Research Reports of the Rural Development Administration (Agri. Inst. Coop.) 31: 163-168.
6210	Rioja, T.C., H. Vargas, and D. Bobadilla. 2010 Observations about differential fertility of two alar morphotypes on Peregrinus maidis (Ashmead) (Hemiptera: Delphacidae) under laboratory conditions. Idesia 28(2): 89-95. pdf
8564	Wu, H.S. 1994 Observation on the occurrence of Nilaparvata lugens with Pellicularia sasakii in rice. Plant Protection 20(1): 21-22.
2262	Hu, G.W., et al. 1981 Observation on the male of short wing-type of Sogatella furcifera (Horvath). Entomological Knowledge 18(4): 154-156.
2777	Lei, G., J. Dai, and Z. Nie. 1984 Observation on the control effect of Cyrtorhinus lividipennis Reuter on planthoppers in paddy fields. Natural Enemies of Insects 6(3): 143-144.
2271	Hu Nan Agricultural College. 1987 Observation on the catching quantity of two spiders Lycosa pseudoannulata and Erigonidium graminicolum to the larvae of rice leaf roller and the nymph of rice plant hopper. Natural Enemies of Insects 9(2): 70-73.
5669	Sun, H.X., X.J. Hu, Y.H. Shu, and G.R. Zhang. 2006 Observation on the antennal sensilla of Sogatella furcifera (Horváth) (Homoptera: Delphacidae) with scanning electron microscope. Acta Entomologica Sinica 49(2): 349-354. pdf
7691	Gu, B.L., P.X. Xue, W.X. Shi, and L.H. Zhou. 2005 Observation on rice spikes infected by Laodelphax striatellus and rice yield loss. Plant Protection Technology and Extension [China Plant Protection] 25(5): 7-8.
8928	Malik, K. and A.Varma. 2000 Observation on egg masses of Epiricania melanoleuca Fletcher (Lepidoptera: Epipyropidae). Insect Environment 6(2): 85-86.
12754	GUO, Meina and Xiangsheng CHEN. 2015 Observation on antennae of Gergithus pseudotessellatus by scanning electron microscopy. Journal of Mountain Agriculture and Biology 2015(2): 14-18.
13848	Samrit, R.M., B.N. Chaudhari, and K.D. Gahane. 2019 Observation of the impact of environmental parameters on brown plant hopper, Nilaparvata lugens (Stal.) and its natural enemies. Journal of Pharmacognosy and Phytochemistry 8(5): 743-745. pdf
3967	Huang, C.W., B.C. Feng, H.D. Wang, J. Yao, and L.J. Song. 1985 Observation of characteristic ecology of whitebacked planthopper on hybrid rice. Journal of Zhejiang University (Agriculture and Life Sciences) (4): 162-164. [Chinese]

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