Browsing Agricultural Biology by Issue Date

Now showing items 1-20 of 136

First report of web blotch of peanut caused by Phoma arachidicola in the dry zone of Sri Lanka

Mikunthan, G. (The American Phytopathological Society., 1997)

Foliar symptoms of web blotch were observed on some peanut cultivars (Arachis hypogaea L.) grown in the Kilinochchi district in the dry zone of Sri Lanka during October 1993 to January 1994, following heavy rains (mean ...
Suppressive Effect of Neem Leaves on Barnyard Earthworm, Eisenia foetida. Workshop on “Neem Research in Sri Lanka: Current Trends and Future Prospects

Mikunthan, G.; Pratheeban, S (2006)

Azadiractin may work as an insect growth regulator interfering with ecdysone, which prevents immature insects from molting. Neem products may also repel insects, stop their feeding, inhibit reproduction and cause other ...
Fusarium semitectum, a potential mycopathogen against thrips and mites in chilli, Capsicum annuum.

Mikunthan, G.; Manjunatha, M. (2006)

In India, chilli (Capsicum annuum L.) suffers with a characteristic leaf curl symptoms due to the attack of mite, Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae) and thrips, Scirtothrips dorsalis Hood (Thysanoptera: ...
Pathogenicity of Fusarium semitectum against crop pests and its biosafety to non-target organisms.

Mikunthan, G.; Manjunatha, M. (Communications in Agricultural and Applied Biological Sciences, 2006)

Microbial control is receiving more attention, since these alternative tactics, compared to chemical control methods, are energy saving, non polluting, ecologically sound and sustainable. A mycopathogen, Fusarium semitectum ...
Pathogenicity of Fusarium semitectum against crop pests and its biosafety to non-target organisms.

Mikunthan, G.; Manjunatha, M. (2006)

Microbial control is receiving more attention, since these alternative tactics, compared to chemical control methods, are energy saving, non polluting, ecologically sound and sustainable. A mycopathogen, Fusarium semitectum ...
Eco-friendly management of hadda beetle using Beauveria bassiana in Brinjal.

Thurkathipana, N; Mikunthan, G. (2008)

Brinjal (Solanum melongena L.) is one among the vegetables grown in Jaffna Peninsula of Sri Lanka. It has been extensively cultivated throughout the country due to its demand among the consumers. The productivity of brinjal ...
Biocontrol of root-knot nematode, Meloidogyne incognita damaging queen palm, Livistona rotundifolia using Trichoderma species.

Jegathambigai, V.; Karunaratne, M.D.; Svinningen, A.; Mikunthan, G. (2008)

Livistona rotundifolia is a widely grown queen palm in all the net houses of floriculture industries in Sri Lanka. It is grown to an extent of 10,000 mZ in Green Farms Ltd, Marawilla under shade net house. Root knot nematode ...
Potential of Trichoderma species on Helminthosporium causing leaf spot on cane palm, Chrysalidocarpus lutescens.

Jegathambigai, V.; Karunaratne, M.D.; Svinningen, A.; Mikunthan, G. (2008)

The cane palm, Chrysalidocarpus lutescens is one among the plant material of the export industries in Sri Lanka. The export quality of C. lutescens was declined due to the repeated occurrence of a leaf spot caused by ...
Nature’s gift to improve soil fertility

Vakeesan, A.; Nishanthan, T.; Mikunthan, G. (LEISA Magazine, 2008)

Excessive use of inorganic fertilizers and pesticides has affected soil and water quality in the Jaffna peninsula, Sri Lanka. Students from the Faculty of Agriculture at the University of Jaffna have been learning about ...
Impact of habitat manipulation on mycopathogen, Fusarium semitectum to control Scirtothrips dorsalis and Polyphagotarsonemus latus of chilli

Mikunthan, G.; Manjunatha, M. (International Organization for Biological Control (IOBC)., 2008-04)

Environmental manipulation or conservation is one among several approaches evolved for harnessing the potentiality of entomopathogens in an integrated pest management. Cultural manipulation can permit the pathogen to ...
Eco-Friendly Management of Root-knot Nematode Meloidogyne incognita (Kofid and White) Chitwood Using Different Green Leaf Manures on Tomato under Field Conditions

Pakeerathan, K.; Mikunthan, G.; Tharshani, N. (IDOSI Publications, 2009)

A field study was conducted to test the effect of different green leaf manures elucidate as eco-friendly management of M.incognita on tomato. Recommended dosage of green leaf manures, such as Gliricidia maculata, Thespesia ...
Effect of Different Animal Manures on Meloidogyne incognita (Kofoid and White) on Tomato

Pakeerathan, K.; Mikunthan, G.; Tharsani, N. (IDOSI Publications, 2009)

Root-knot nematode, Meloidogyne incognita are generally regarded as silent enemies in soil and cause losses up to 80% in heavily infested vegetable fields. Stunting, yellowing and a general unthrifty appearance are the ...
Damage Pattern of Cabbage Flea beetle, Phyllotreta cruciferae (Goeze) (Coleoptera: Chrysomelidae) and its Associated Hosts of Crops and Weeds.

Mayoori, K; Mikunthan, G. (IDOSI Publications, 2009)

Among the insect pests of Brassicaceae crops flea beetle, Phyllotreta cruciferae (Coleoptera: Chrysomelidae) has been emerged as a serious pest in Jaffna district of Sri Lanka and inflicted severe damage in the seedling ...
Organic fertification as an eco friendly management of rice disease Magnaporthe grisea

Tharshani, N; Mikunthan, G. (Proceedings, organic farming: a response to economic and environmental challenges, Lednice na Moravě, Czech Republic, 2009)

Rice blast is a belligerent plant disease caused by Magnoparthe grizae (Pyricularia oryzae) occurs in rice production areas all over the world and is one of the most common diseases in South Asia. Plant health conditions ...
Efficient plant regeneration via organogenesis in ‘‘Egusi’’ melon (Colocynthis citrullus L.)

Valentine, O.N.; Thirukkumaran, G.; Shunsuke, I.; Masahiro, M. (Elsevier, 2009)

Plant regeneration protocol of ‘‘Egusi’’ melon (Colocynthis citrullus L.) was established using three local (‘‘Ejagham’’, ‘‘Sewere’’ and ‘‘Barablackedge’’) and one improved (NHC1-130) cultivars. Cotyledonary explants of ...
Association of Insect Pests with Neem, Azadiracta indica with Special Reference to Biology of Ash Weevils, Myllocerus sp in Jaffna, Sri Lanka

Kiyanthy, S.; Mikunthan, G. (IDOSI Publications, 2009)

In spite of remarkable spectrum of activity of neem, Azadirachta indica (Family: Meliaceae) against pests, does the tree itself not immune to them. Many insects such as ash weevils, tortricid moth, peacock moth, scale and ...
Isopentenyl transferase gene expression offers the positive selection of marker-free transgenic plant of Kalanchoe blossfeldiana

Thirukkumaran, G.; Khan, R.S.; Chin, D.P.; Nakamura, I.; Mii, M. (2009 Springer Science+Business Media B.V., 2009-06)

The technologies allowing the production of transgenic plants without selectable marker genes, is of great interest in public and environmental safety. For generating such marker-free transgenic plants, possibility has ...
Thidiazuron: An efficient plant growth regulator for enhancing Agrobacterium-mediated transformation in Petunia hybrida

Thirukkumaran, G.; Ntui, V.O.; Khan, R.S.; Mii, M. (Springer Science+Business Media B.V. 2009., 2009-08)

Efficient shoot regeneration and Agrobacterium-mediated genetic transformation systems were developed for Petunia hybrida cv. Mitchell. Leaf explants of petunia were cultured on Murashige and Skoog (MS) medium with different ...
Efficacy of Curcuma aeruginosa rhizome and Adhatoda vasica plant extracts, on red spider mite, Tetranychus urticae in Livistona rotundifolia.

Svinningen, A.E.; Rashani, K.P.; Jegathambigai, V.; Karunaratne, M.D.; Mikunthan, G. (2010)

Queen palm, Livistona rotundifolia foliage contributes greatly in export industry. Red spider mite (RSM) (Tetranychus urticae) infests on the foliage and reduces its affordable market quality. T. urticae is found in dry ...
Generation of phenotypically normal marker-free transgenic plants of Kalanchoe blossfeldiana through hairy root induction

Thirukkumaran, G.; Ntui, V.O.; Khan, R.S.; Nakamura, I.; Mii, M. (The Japanese Society for Plant Cell and Molecular Biology., 2010)

Multi-Auto-Transformation (MAT) vector system consists of positive selection, using the ipt or rol gene, with a site-specific recombination and DNA removal system, that generates morphologically normal marker-free transgenic ...

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