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Browsing International Journal of Tropical Agricultural Research & Extension by Issue Date

Browsing International Journal of Tropical Agricultural Research & Extension by Issue Date

Now showing items 21-40 of 397

Impact of biofertilizers on morpho-physiological attributes in pungam (Pongamia pinnata (L.) Pierre) seedlings

Venkatesh, A.; Vanangamudi, Mallika; Vanangamudi, K.; Ravichandran, V.; Rai, R.S. Vinaya (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-02-18)

Investigations were conducted to determine the efficacy of biofertilizer inoculations with Rhizobium, phosphobacteria and Vesicular-Arbuscular Mycorrhiza (VAM), individually and in combination on the growth, biomass, ...
Embryonal shoot tip multiplication in peanut: Clonal fidelity and variation in regenerated plants

Eapen, Susan; Kale, D.M.; George, Leela (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-02-18)

A high yielding, early maturing, semi dwarf variety of peanut {Arachis hypogaea L.) was multiplied in vitro by embryonal shoot tip culture on Murashige and Skoog (MS) medium supplemented with phytohormones. Of the different ...
Beneficial changes in environment and growth characteristics in intercropping systems with vegetables and arable crops

Olasantan, F.O. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-03-03)

Field experiments were conducted in 1985- 88 and in 1995- 97 in Nigeria to determine the effect of melon and okra on the micro-environment and crop growth in mixtures with maize, cowpea and cassava. The vegetables and ...
Insecticidal activity of eight plant species on egg laying, larval development and adult emergence of Callosobruchus maculatus (F.) in cowpea

Dharmasena, C.M.D.; Simmonds, S.M.J.; Blaney, W.M. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-03-15)

Freeze dried powdered leaves of Cymbopogum citratus (DC) Stapf, Cinnamomum camphora (L.) Nee & Eberm Ipomoea mauritiana Jacq. Tamarandus indicus L., Lantana camara L., Myroxylon balsumum (L.) Harm, Citrus aurantium L. ...
Water relations of clonal tea (Camellia sinensis L.) with reference to drought resistance: i. Diurnal variations

Wijeratne, M.A.; Fordham, R.; Anandacumaraswamy, A. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-04-10)

The diurnal variations of water relations of the tea plant were studied using petted young tea plants with particular reference to drought tolerance. Glasshouse experiments showed that the diurnal changes of plant water ...
Variability in Neovossia indica: Based on pathogenecity and isozyme analysis

Sharma, Indu; Nanda, G.S.; Kaloty, P.K. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-06-11)

To identify variability in Neovossia indica in the fourteen isolates collected from different agroclimatic areas of Punjab, pathogenecity tests and isozyme analysis based on starch-gel electrophoresis were carried ...
Classification of Fusarium oxysporum strains associated with reddishbrown rot of asparagus on the basis of vegetative compatibility

Sapumohotti, W.P. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-06-11)

Nitrate reduction mutants (/i/Y-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 ...
Predation of bacteria by Lampito mauritii (Kinberg) and Eudrilus eugeniae (Kinberg) reared in different substrates

Parthasarathi, K.; Ranganathan, L.S.; Anandi, V. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-06-12)

The quanti-qualitative nature of bacteria in the gut and casts of Lampito mauritii and Eudrilus eugeniae as influenced by different feeding substrates like soil, sawdust, pressmud and pressmud-sawdust mixture have been ...
Present status of managing chilli leaf curl complex in the North Central Province of Sri Lanka

Dharmasena, C.M.D. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-06-25)

A survey was conducted in the North Central Province (NCP) of Sri Lanka, during the South-West monsoon season (yala2) 1996, to study the crop management practices followed by farmers and the impact of such practices on ...
Water relations of clonal tea (Camellia sinensis L.) with reference to drought resistance: II. Effect of water stress

Wijeratne, M.A.; Fordham, R.; Anandacumaraswamy, A. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-08-13)

first quarter of the year due to uneven distribution of rainfall. Hence, screening of clones for drought tolerance is important for introducing suitable clones for drought prone regions. A glass house experiment was ...
Exotic mungbean (Vigna radiata L. Wilczek) germplasm: Its utilization through conventional breeding approach

Sadiq, M.Siddique; Khattak, G.S.S.; Saleem, M.; Sarwar, G. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-08-13)

Improved mungbean (Vigna radiata (L.) Wilczek) germplasm having high yield potential and large seed size developed at the Asian Vegetable Research and Development Centre (AVRDC), Taiwan was crossed with indigenous material ...
Incidence and pathogenicity of fungi associated with seedling disease of rain-fed wheat (Triticum aestivum L.) in Nigeria

Enikuomehin, O.A.; Bankole, S.A. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-08-15)

A post- emergence disease of rain-fed wheat (Triticum aestivum L.) encountered in Ibadan, South-Western Nigeria was investigated. The incidence of disease was 13.07% in 1993,20.81% in 1994 and 11.95% in 1995 on six wheat ...
Diagnosis of leaf nutrient levels for optimum productivity of Citrus reticulata Blanco grown in black clay soils under a sub-humid tropical climate

Kohli, R.R.; Srivastava, A.K.; Huchche, A.D.; Dass, H.C.; Ram, Lallan; Singh, Shyam (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-08-25)

Nagpur mandarin {Citrus reticulata Blanco) orchards under hot sub-humid tropical climate of Central India were surveyed with a view to diagnose the nutrient constraints through leaf and soil analysis, to understand ...
Evaluation of cassava clones for resistance to anthracnose disease using phytotoxic metabolites of Colletotrichum gloeosporioides/. sp. manihotis and its correlation with field disease reactions

Amusa, N.A. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-08-30)

Colletotrichum gloeosporioides f sp. manihotis, the causal agent of cassava (Manihot spp) anthracnose disease produces toxic metabolites in culture. Symptoms induced on cassava leaves and stem cuttings by the toxic ...
The effect of the origin of the explant on in vitro growth of axillary buds of Hevea brasiliensis

Seneviratne, P.; Gammanaliyanage, S.S.; Wijesekara, G.A.S. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-09-08)

The effect of the origin of explants from different zones of the source plants on in vitro axillary bud growth in rubber (Hevea brasiliensis Muell Arg.) was investigated. Both juvenile (seedling) and mature (clonal) plants ...
Rearing and release of the pulse weevil parasitoid Dinarmus basalis (Rond.) (Hymenoptera:Pteromalidae)

Islam, W. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-09-14)

Mass rearing technique of Dinarmus basalis and release of this parasitoid in an experimental room to determine its potential as a biological control agent, against a solitary larval-pupal parasitoid of the pulse weevil, ...
Variation in egg and adult production of Callosobruchus maculatus (F.) and Callosobruchus chinensis (L.) and the effect of egg density and oviposition site limitation

Wijeratne, P.M. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-09-20)

Variation in egg and adult production in Yemen and Brazil strains of C. maculatus and Indonesian strain of C. chinensis was investigated on cowpea {Vigna unguiculata (L.) Walp), greengram (Vigna radiata (L.) Wilczek) and ...
Reaction of selected cowpea (Vigna unguiculata L. Walp) bfeedinglihcs to Xanthomonas campestrispv. vignicola

Amusa, N.A.; Okechukwu, R.U. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-10-15)

Disease pressure in a cowpea screening field in Kano, a Sudan Savanna region of Nigeria, was increased by early planting of spreader lines of cowpea varieties susceptible to bacterial blight incited by Xanthomonas vignicola. ...
Factors responsible for productivity of food legumes: Findings of a farmer survey in the Kurunegala district, Sri Lanka

Hettiarachchi, M.P.; De Costa, W.A.J.M.; Jayasekera, S.J.B.A. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-11-10)

Food legumes are an important component in upland cropping systems of subsistence farmers in Sri Lanka. The objective of this study was to understand the factors responsible for the gap between potential yield and farmer ...
Effect of infection level of sesame (Sesamum indicum L.) seed by Alternariasesami on severity of Alternaria leaf spot

Ojiambo, P.S.; Narla, R.D.; Ayiecho, P.O.; Nyabundi, J.O. (Faculty of Agriculture, University of Ruhuna, SriLanka, 1998-11-11)

Alternaria sesami infection in sesame seed samples collected from farmers in Busia, Kakamega and Siaya districts of Kenya was detected by oat meal agar method. Infection levels in seed samples varied from 8.96% in Kakamega ...

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