Archive for May, 2009

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Carbofuran Residues in Rice Plants and Paddy Water

Sunday, May 31st, 2009

Carbofuran is one of the most toxic carbamate insecticides. It is used to control insects in a wide variety of field crops, including rice, banana, potato, corn and soybeans. Sri Lankan farmers use carbofuran extensively over the years and it affects the environment, water bodies and natural fauna and flora. Therefore, it is necessary to […]

Seed availability as a limiting factor for the succession in degraded grasslands in the Knuckles forest reserve, Sri Lanka

Sunday, May 31st, 2009

Tropical forest loss and the degradation of abandoned lands are proceeding at an alarming rate. In Sri Lanka, natural forests have shrunk to half their size within a span of three decades. Although anthropogenic disturbance is responsible for the low rate of tree invasion into grasslands, cessation of this disturbance does not readily lead to […]

An Assessment of Potentiality of Natural Water Resources Bounded by Maha Oya in Polgasowita area

Sunday, May 31st, 2009

Analysis of water from 96 domestic wells was carried out in the area bounded by Maha Oya in Polgasowita in Colombo district to asses the potentiality of natural water resources. Sample collection was done during dry season from December to February 2007/2008 in the area using stratified random sampling. The samples were analysed for conductivity, […]

Soil Carbon Management in Agricultural land-uses – A win-win Option for Local and Global Problems: A case study in Thailand

Sunday, May 31st, 2009

Conservation of soil organic carbon is essential for long-term sustainable agriculture. On the other hand sequestration of carbon by soils is important to reduce global warming problems. Different agricultural land-uses in a sub-watershed in Thailand were assessed in terms of soil carbon management. Roth C model was used to forecast soil carbon of present land-uses […]

Plant diversity of Agricultural Land-uses and Farmer Perception on Environment: A Case Study in a Sub-watershed in Thailand

Sunday, May 31st, 2009

Agricultural land-uses were assessed in terms of plant diversity in Khlong Yai sub watershed in Thailand. The linkages of plant diversity to farmer perception on environment were also studied. 20 x 20 m, 5 x 5 m and 1 x 1 m quadrats, nested within each other, were used as sampling units to estimate plant […]

INFORMAL SOLID WASTE MANAGEMENT PRACTICES AND STRATEGIES FOR INTEGRATION IN AMRITSAR CITY, INDIA

Sunday, May 31st, 2009

Urban India currently produces about 36.5 million tones of waste and this figure  is expected to touch an astounding 300 million tones given the current spate in the consumption patterns and materialistic lifestyles of the ‘haves’ which has accelerated the per capita consumption and consequently waste generation. From a current per capita rate of 490 […]

Invasive aquatic flora new threats to ponds in Jaffna -Case Study-

Sunday, May 31st, 2009

The stockpile of genetic diversity found in pond eco systems is extremely important to the continuing functioning of the environment. If biodiversity declines, ecosystem integrity will be increasingly threatened. Aquatic flora as environmental indicators of ecological condition in Jaffna ponds floating aquatic plants can act as measurable indicators of ecological conditions occurring within pond, and […]

Eco friendly management of tomato Root knote nematode (Meloidogyne spp) in Calci Red yellow Latersol

Sunday, May 31st, 2009

Root-knot nematodes (Meloidogyne spp.) are major pathogens of vegetables in the Jaffna peninsula and world, impacting both the quantity and quality of marketable yields.  All species of Meloidogyne are called ‘root knot’ nematode, but each species has a different host range, causing confusion over which crops or cultivars are resistant or tolerant to which species […]

EFFECT OF METHOD OF PLANTING AND TIME OF WEEDING ON GROWTH AND YIELD OF ROW SOWN GINGELLY (Sesamum indicum L.) VAR:Malee UNDERCROPPED WITH COCONUT (Cocos nucifera L.)

Sunday, May 31st, 2009

Gingelly (Sesamum indicum L.)  a traditional crop in chena cultivation, is one of the important oil crop in the dry zone of Sri Lanka.  Method of establishment and weeding are identified as critical yield attributed agronomic practices in gingely cultivation. Two separate experiments were carried out at the Farm of School of Agriculture, Kundasale to […]

Biological Potential of Two Trichoderma harzianum Isolates (R1 and R2) in the Control of Postharvest Anthracnose Pathogen (Colletotrichum gloeosporioides) of Rambutan ( Nephelium lappacium L.)

Sunday, May 31st, 2009

Anthracnose caused by Colletotrichum gloeosporioides is one of the predominant postharvest diseases of rambutan in Sri Lanka. In this study, the in vitro potential of two selected T. harzianum isolates (R1 and R2) was evaluated against the postharvest anthracnose pathogen (C. gloeosporioides) of rambutan (Nephelium lappacium L.). Two T. harzianum isolates (R1 and R2) isolated […]

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