Tropical Agricultural Research & Extension
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Item Variation in egg and adult production of callosobruchus maculatus (F.) and callosobruchus chinensis (L.) and the effect of egg density and oviposition site limitation(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Wijeratne, P.M.Item Effect of elevated carbon dioxide concentration and relative humidity on the growth of forest tree seedlings(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Nataraja, K.N.; Prasad, T.G.; Udayakumar, M.Item Comparison of length-weight relationships and fecundity between pond cultured and reservoir (Victoria) inhabiting common carp (Cyprinus carpio)(Univeristy of Ruhuna. Kamburupitiya, 1998) Nathanael, S.Comparisons were made on the length weight relationships, fecundity and egg diameter distribution of yolked ova in mature ovaries of pond cultured female common carp with those collected during the same period from the Victoria reservoir. Irrespective of the location, the condition factor of gravid females was within the range 1.6-2.0. However, the average body condition of ripe females from the reservoir was better than those from the pond. Yolked ova in ripe (Stage vi) ovaries had a diameter between 0.85 to 1.70 mm. The single mode indicates that the ova ripen simultaneously and are shed in a single batch. Fecundity is linearly related to body and gonad weight, and curvilinearly to body length. Fecundity of pond cultured females with a length of 30.8 to 46.0 cm had a fecundity between 49, 070 and 240, 100 Irrespective of the location, the fecundity of females within the same length group were within the same range. The presence of larger sized females with a correspondingly high fecundity and good body condition which produce heavily yoilked eggs indicated that under the prevailing conditions, there is potential for the establishement of a common carp based fishery in large , deep reservoirs like the Victoria, Development of pond culture to re-stock heavily depleted reservoirs with fingerlings is therefore feasible.Item Classification of Fusarium oxysporum strains associated with reddish brown rot of asparagus on the basis of vegetative compatibility(University of Ruhuna. Kamburupitiya, 1998) Sapumohotti, W.P.Nitrate reduction mutants (nit- mutants) were selected from 33 isolates of Fusarium oxysporum isolated from asparagus plantings showing reddish brown rot symptoms in Malaysia. These nitrate reduction mutants were used in complementation tests for vegetative compatibility. Nine vegetative compatibility groups (VCGS) were identified, but most (19) isolates fell into 4 VCGs that were found at more than one location. There was no strong interrelationship between VCG and location. However, seven isolates were identified as vegetatively self- incompatible based on their inability to form heterokaryons between complementary nit- mutants.Item Insecticidal activity of eight plant species on egg laying, larval development and adult emergence of Callosobruchus maculatus (F.) in cowpea(1998) Dharmasena, C.M.D.; Simmonds, S.M.J.; Blaney, W.M.Item Molecular analysis of whitefly transmitted tomato geminiviruses from southeast and east Asia(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Zeidan, M.; Green, S.K.; Maxwell, D.P.; Nakhla, M.K.; Czosnek, H.Item Reaction of selected cowpea (vigna unguiculata L. walp) breeding lines to xanthornonas compestris pv.(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Amusa, N.A.; Okechukwu, R.U.Item Characterization of a Q-banded karyotype of a crossbred bull(University of Ruhuna. Kamburupitiya, 1998) Gunawardena, A.With the objective of characterizing the Q-banding pattern of cattle chromosomes, peripheral blood lymphocyte metaphase chromosomes of a bull calf (Bos indicus x Bos taurus L.) were studied using quinacrine fluorescence banding technique. A karyotype of the Q- banding pattern of bovine chromosomes, together with a diagrammatic representation and a complete diploed cell is presented. The haploid set of metaphase chromosomes showed 125 positive bands. A detailed description of the positive bands were given in the idiogramme, providing accurate description of the banding pattern on individual chromosomes of this species. This technique is simple and reproducible and can be used in routine chromosome analysis.Item Predation of bacteria by lampito mauritii (Kinberg) and eudrilis(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Parthasarathi, K.; Ranganathan, L.S.; Anandi, V.Item Effect of infection level of sesame (sesamum indicum L.) seed by alternaria sesami on severity of alternaria leaf spot(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Ojiambo, P.S.; Narla, R.D.; Ayiecho, P.O.; Nyabundi, J.O.Item Factors responsible for productivity of food legumes. findings of a farmer survey in the Kurunegala district, Sri Lanka(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Hettiarachchi, M.P.; De Costa, W.A.J.M.; Jayasekera, S.J.B.A.Item Variability in neovossia indica. based on pathogenecity and isozyme analysis(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Sharma, I.; Nanda, G.S.; Kaloty, P.K.Item Present status of managing chilli leaf curl complex in the North Central province of Sri Lanka(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Dharmasena, C.M.D.Item Influence of ozone on the growth and yield of tomato (Lycopersicon esculentum Mill cv Rodeo)(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Seresinhe, P.S.J.W.Item Improvement of shoot proliferation in the micropropagation of mulberry (Moms albaL.)(1998) Zaman, A.; Islam, R.; Islam, M.; Joarder, O.I.Item Rearing and release of the pulse weevil parasitoid dinarmus basalis (Rond.)(Hymenoptera. Pteromalidae)(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Islam, W.Item Impact of biofertilizers on morpho-physiological attributes in pungam (Pongamia pinnata (L.) Pierre) seedlings(1998) Venkatesh, A.; Vanangamudi, M.; Vanangamudi, K.; Ravichandran, V.; Vinaya Rai, R.S.V.Item Phenotypic and genetic trends of some reproductive traits in N dam herd at fashola stock farm Nigeria(Faculty of Agriculture, University of Ruhuna. Kamburupitiya, 1998) Orheruata, A.M.; Olutogun, O.