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A R Viji - One of the best experts on this subject based on the ideXlab platform.
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A New Species of Fimbristylis (Cyperaceae) from Western Ghats, India
Phytotaxa, 2018Co-Authors: A R Viji, T S PreethaAbstract:Fimbristylis agasthyamalaensis , a new species belonging to section Fuscae from Western Ghats, India is described and illustrated with photographs. The species shows some morphological similarities with F. onchnidiocarpa , but differs in having three stamens, larger anthers, 1–3 slightly twisted spikelets, smaller involucral bracts and obconical nutlets with cupular stipe. Its distribution, ecology and conservation status are also discussed.
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On the occurrence of two little known Fimbristylis (Cyperaceae) from Kerala, India.
Annals of Plant Sciences, 2017Co-Authors: M P Rijuraj, A R Viji, M Rajendraprasad, A. G. PanduranganAbstract:Two little known Fimbristylis species have been collected from lateritic plains of Kerala. A brief description, notes and detailed illustrations are provided for easy identification.
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Fimbristylis scabrida (Cyperaceae): a new record for Asian Continent
Annals of Plant Sciences, 2017Co-Authors: A R Viji, T S PreethaAbstract:Fimbristylis scabrida Schumach. (Cyperaceae), an African sedge species is reported here for the first time from the Western Ghats of India in the Asian continent. A brief description, notes and colour photographs are provided for easy identification.
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Fimbristylis tuckeri (Cyperaceae), a new sedge species from the Western Ghats, India
Kew Bulletin, 2016Co-Authors: A R Viji, A. G. Pandurangan, Deepu SivadasAbstract:Fimbristylis tuckeri, a perennial fimbristyloid sedge from Nilgiri Biosphere Reserve and its environs in Western Ghats, India is described as a new species. It is similar to its closest morphological relative, F. filifolia Boeckeler but differs by the 5-angular scabrid culms, glumaceous involucral bracts and sessile spikelets. A detailed description, phenology, distribution, relevant notes and colour photographs are provided.
Abdul Shukor Juraimi - One of the best experts on this subject based on the ideXlab platform.
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Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia
Journal of Agronomy, 2010Co-Authors: M. A. Hakim, Abdul Shukor Juraimi, Mohd Razi Ismail, Mohamed M. Hanafi, Ali SelamatAbstract:This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.
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Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia
Journal of Agronomy, 2010Co-Authors: M. A. Hakim, Abdul Shukor Juraimi, Mohd Razi Ismail, Mohamed M. Hanafi, Ali SelamatAbstract:This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.
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The effect of nitrogen fertilization and emergence cohorts on the survival, growth and reproduction of Fimbristylis miliaceae L. Vahl
International Journal of Approximate Reasoning, 2008Co-Authors: Mahfuza Begum, Abdul Shukor Juraimi, Syed Omar Syed Rastan, Rajan Amarthalingam, Azmi ManAbstract:This research was conducted in the glasshouse at Universiti Putra Malaysia to determine the influence of nitrogen fertilization and cohorts of emergence on plant survival and reproductive capacity of Fimbristylis miliacea. One hundred seeds were sown on the surface of the saturated soil in the buckets. The treatments were without nitrogen (N) and with 170 kg N ha-1. The experimental design was CRD with eight replications. Fimbristylis miliacea seedling emergences was recorded weekly up to 4 weeks and were considered as 1st, 2nd, 3rd and 4th cohorts, respectively. Considering the repeated observation of emergence cohorts, statistical analysis was done as a split plot design where N treatment was considered as main plot and emergence cohorts was subplot by using the SAS statistical software and means were tested using Tukey`s studentized range test at the 5% level of probability. Percentage emergence and percentage survival data were transformed into square root values and cumulative cohort data for all parameters were analyzed using unpaired t test to determine N effects. The nitrogen had no influence on F. miliacea emergence. Whereas, high death rates in F. miliacea among young seedlings indicated a Deevey Type III survivorship curve and higher number of deaths occurred in late emerging cohorts (4th cohorts) especially when nitrogen was applied. Early emerging cohorts had greater survivorship and contributed most extensively to the next generation by producing more than 90% seeds irrespective of nitrogen treatment. Fimbristylis miliacea plants establishing from every 100 seeds can reproduce 287,722 seeds with nitrogen treatment, which was 1.65 fold greater than without nitrogen.
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GROWTH AND DEVELOPMENT OF Fimbristylis miliacea (L.)Vahl
Biotropia: The Southeast Asian Journal of Tropical Biology, 2008Co-Authors: Mahfuza Begum, Abdul Shukor Juraimi, Syed Omar Syed Rastan, Rajan Amartalingam, Azmi ManAbstract:This experiment was conducted in the glasshouse of Universiti Putra Malaysia, to determine the growth and development of Fimbristylis miliacea (L.) Vahl. Twenty F. miliacea seeds were surface sown in ten plastic buckets of 18 cm diameter filled with 3 kg soil. After germination only one plant/bucket was retained. Time of first seedling emergence, time and number of leaves appearing until first tiller formation, time of tiller formation, first inflorescence, the first 10 inflorescences appearance and their maturity were recorded for each plant. Plant height and the number of inflorescence per plant was recorded weekly for up to 4 months after sowing. The first ten inflorescences for each plant were tagged after emergence, subsequently mature inflorescences were collected and the numbers of spikelets/inflorescence, seeds/inflorescence, seeds/ plant and 1000 seed weight were determined. Statistical analysis was performed as complete randomized design on weekly observed plant height and inflorescence number using the SAS statistical software and means were tested using Tukey’s studentized range test at the 5% level of probability. Fimbristylis miliacea seedlings emerged at 3 days after planting of seeds. Approximate times required for the sequential production of 10 leaves, tillers, first 10 inflorescence and their maturity were 28 days after emergence (DAE), 35 DAE, 49 DAE, 63 DAE, respectively. Plant height increased rapidly from 3-8 WAE and maximum plant height (64.05 cm) was attained at 10 WAE. This species had three important growth stages: a slow growth stage during the first 4 week after emergence (WAE); a rapid growth stage from 4-9 WAE; and finally, a maximum growth stage from 9-17 WAE. Within this first 4 weeks after emergence would be the most appropriate time for controlling this species with early post emergence herbicides. Each F. miliacea plant produced on average of 2.3 tillers/plant and a total of 134 inflorescences, with 84 inflorescences/plant ripening within this period. Each inflorescence comprised of 48 spikelets with 511 seeds and matured after 3 weeks of emergence. Total seeds/plant and 1000 seed weight were 42,275 and 0.035 g, respectively. Time required for seed ripening was 76 days after emergence.
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Soil seedbank of the Muda Rice Granary in Northwest Peninsular Malaysia invaded by the Weed Fimbristylis miliacea (L.) Vahl
Plant protection quarterly, 2008Co-Authors: Mahfuza Begum, Abdul Shukor Juraimi, M. Azmi, S. R. S. Omar, A. RajanAbstract:The experiment was conducted in the glasshouse at Universiti Putra Malaysia from March 2003 to June 2004 to determine the soil seedbank of Fimbristylis miliacea in the rice fields of the Muda rice granary in Peninsular Malaysia. Six soil cores of 5 cm in diameter and 10 cm depth were sampled from each of 24 fields. All samples from each individual field were bulked and placed in plastic trays of 38 25 10 cm. Soil was moistened as required and emergence of weed seedlings was recorded over a period of one year. After one year, remaining seeds were separated, removed and identified. The total seed bank was estimated at 1136.48 million m-2 including 20 taxa. Based on per cent composition the five most dominant species in terms of seed reserves were F. miliacea, Leptochloa chinensis, Ludwigia hyssopifolia, Cyperus difformis and Cyperusiria. Fimbristylis miliacea exhibited a very abundant 750.84 million seeds ha-1, 66.07% of the total seed reserve, of which 411.48 million seedlings ha-1 (55%) emerged in soil trays, 61.59 million seedlings ha-1 (8%) in Petri dishes and the remaining 277.77 million seeds ha-1 (37%) were dormant or dead. Fimbristylis miliacea seedling emergence was highest in the first observation in April 2003 and seedling emergence showed no clear peaks. The study suggests a large persistent seedbank of F. miliacea in Muda rice fields.
Ali Selamat - One of the best experts on this subject based on the ideXlab platform.
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Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia
Journal of Agronomy, 2010Co-Authors: M. A. Hakim, Abdul Shukor Juraimi, Mohd Razi Ismail, Mohamed M. Hanafi, Ali SelamatAbstract:This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.
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Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia
Journal of Agronomy, 2010Co-Authors: M. A. Hakim, Abdul Shukor Juraimi, Mohd Razi Ismail, Mohamed M. Hanafi, Ali SelamatAbstract:This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.
T S Preetha - One of the best experts on this subject based on the ideXlab platform.
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A New Species of Fimbristylis (Cyperaceae) from Western Ghats, India
Phytotaxa, 2018Co-Authors: A R Viji, T S PreethaAbstract:Fimbristylis agasthyamalaensis , a new species belonging to section Fuscae from Western Ghats, India is described and illustrated with photographs. The species shows some morphological similarities with F. onchnidiocarpa , but differs in having three stamens, larger anthers, 1–3 slightly twisted spikelets, smaller involucral bracts and obconical nutlets with cupular stipe. Its distribution, ecology and conservation status are also discussed.
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Fimbristylis scabrida (Cyperaceae): a new record for Asian Continent
Annals of Plant Sciences, 2017Co-Authors: A R Viji, T S PreethaAbstract:Fimbristylis scabrida Schumach. (Cyperaceae), an African sedge species is reported here for the first time from the Western Ghats of India in the Asian continent. A brief description, notes and colour photographs are provided for easy identification.
M. A. Hakim - One of the best experts on this subject based on the ideXlab platform.
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Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia
Journal of Agronomy, 2010Co-Authors: M. A. Hakim, Abdul Shukor Juraimi, Mohd Razi Ismail, Mohamed M. Hanafi, Ali SelamatAbstract:This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.
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Distribution of Weed Population in the Costal Rice Growing Area of Kedah in Peninsular Malaysia
Journal of Agronomy, 2010Co-Authors: M. A. Hakim, Abdul Shukor Juraimi, Mohd Razi Ismail, Mohamed M. Hanafi, Ali SelamatAbstract:This study aimed to develop appropriate weed management technology on selected salt tolerant rice variety(s) as well as to develop package of production technologies for rice in saline environments of Malaysia. This study was conducted at 40 different rice fields in 10 blocks of Kedah coastal area of West Malaysia during June-July, 2009 to identify most common and prevalent weeds associated with rice. Fields survey were done according to the quantitative survey method by using 0.5x0.5 m size quadrate with 20 samples from each field. A total of 42 different weed species belonging to 17 families were identified of which 25 annual and 17 perennial; 9 grassy weeds, 11 sedges and 22 broadleaved weeds. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona, Cyperus iria, Sphenoclea zeylanica, Cyperus deformis, Oryza sativa spontanea, Scirpus grossus and Jussia linifolia were most frequent species covering more than 50% fields. Based on relative abundance indices, annuals were more dominant than perennials. Leptochloa chinensis, Echinochloa crusgalli, Fimbristylis miliacea, E. colona were most dominant weed species in the coastal rice field of Kedah.