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Item Floral relationships of bees in selected areas of Sri Lanka(University of Peradeniya. Peradeniya, 2005) Karunaratne, W.A.I.P.; Edirisinghe, J.P.; Gunatilleke, C.V.S.Item Effect of releasing oothecae parasitized by Tetrastichus hagenowii and Evania appendigaster for the control of Periplaneta americana(1987) Manikkam, M.; Edirisinghe, J.P.Item Rice fields:an ecosystem rich in biodiversity(NSF:Colombo, 2006) Edirisinghe, J.P.; Bambaradeniya, C.N.B.Item Preliminary observations on graminaceous aphids (Homoptera: Aphididae) of the Peradeniya University Park(1995) Wijerathna, M.A.P.; Edirisinghe, J.P.Fourty two grass species, mostly weeds, found within about 70 heactares of the Peradeniya University Park, were examined for aphids.Eight species of aphids were recorded from 21 grass species in the study area. Two of the aphid species collected, Hysteroneura setariae (Thomas) and Rhopalosiphum Padi (L.) had not bee previously recorded from Sri Lanka.Item List of thrips (Thysanoptera) recorded from Sri Lanka(National Science Foundation:Colombo, 2007-9) Tillekaratne, K.; Mound, L.A.; Strassen, R.Z.; Edirisinghe, J.P.Item A Check List of Aphids and their Host Plants from Sri Lanka(NSF:Colombo; 21p, 1999) Wijerathna, M.A.P.; Edirisinghe, J.P.Item Biodiversity associated with a nature trial at Ambuluwawa forest in Gampola(University of Peradeniya. Peradeniya, 2002) Kusumawathie, W.M.; Edirisinghe, J.P.Item Effect of quantity and quality of light on survival growth and morphology of mahogany(Swietenia macrophylla (King) seedlings(National Science Foundation:Colombo, 2001) Mahroof, R.M.; Edirisinghe, J.P.Item An annotated list of aphids of Peradeniya Campus, Sri Lanka(1994) Edirisinghe, J.P.A list is given of 17 species of aphids with their host plants (52 plant species in 29 familes) from Peradeniya campus, located in the Central Province of Sri Lanka. Nine of the aphid species had not been previously recorded from Sri Lanka. Of them, Sitobion wikstroemiae (Mamet) has been recorded only from Mauritius and East Africa and Uroleucon minutus van der Goot is considered a rare species. Two of the aphid hyperparasitoids collected. Syrphophagus hofferi (Hayat) and Coagerus boucaki Noyes and Hayat are without previous host recordsItem Variation in pattern of attack by Hypsipyla robusta(Moore)and recovery of seedlings following simulated Hypsipyla damage on Swietenia macrophylla (king)grown under different light conditions(University of Peradeniya. Peradeniya, 2001) Mahroof, R.M.; Hauxwell, C.; Edirisinghe, J.P.