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Articles by M. Ashrafuzzaman
Total Records ( 9 ) for M. Ashrafuzzaman
  M.M. Hoque , K. M. Khalequzzaman , Md. Abid Hussain , Md. Alauddin Khan and M. Ashrafuzzaman
  A field study was conducted to study some cultural treatments to find out an effective method, alternative to spraying of insecticide, for controlling vector to manage jute leaf mosaic disease. Five treatments viz. T1 (Malathion 57 E.C), T2 (field sanitation with rouging), T3 (Hanging of polythene strips), T4 (extra dose of nitrogen) and T5 (control) were assigned randomly having four replications. T2 and T4 showed best performance on all the parameters including leaf mosaic of jute. However, the highest yield of raw jute 3091.5 kg ha-1 and stick 5709.6 ha-1 was obtained from T4 and the second highest 2541.6 kg ha-1 of raw jute and 5039.1 kg ha-1 of stick were obtained in T2. A combination of collection and use of seeds from healthy plants, one insecticidal spray around 30 days after emergence (DAE), combined with field sanitation with rouging several times in the growth period and application of an extra booster dose of nitrogen at around 45 DAE may be prescribed to farmers of Mymensingh region of Bangladesh.
  M. Ashrafuzzaman , M.A. Halim Khan and S.M. Shahidullah
  A pot experiment was conducted with five levels of salinity (EC 0, 2.0, 4.0, 6.0 and 8.0 dSm-1) obtained by adding NaCl with soil in order to study the effect of salinity on vegetative growth of maize. Higher salinity levels caused significant reduction in growth parameters like leaf length, leaf breadth, leaf number and leaf area, root dry weight, shoot dry weight and total dry weight. However, it had less effect on root: shoot ratio.
  Mosharraf Hossain , Shah Md. Munirur Rahman , K.M. Khalequzzaman , Md. Nazrul Islam and M. Ashrafuzzaman
  Twenty nine different genotypes/advanced breeding lines and four cultivars/checks viz. BR11, BR22, BR25 and BRRI dhan 38 of rice were selected for the study to examine and screen out the advanced hybrid lines, which are resistant/tolerant to BLB and sheath rot. Three accessions (22, 68, 157) showed resistant reaction in T. aman season and six accession (22, 54, 58, 68, 139, 157) showed highly resistant (HR) reaction and four entries (37, 62, 75, 128) were resistant to BLB in Boro season. One accession (58) showed resistant in T. aman season and three (59, BR11, BRRI dhan 38) were found highly resistant and one accession (54) showed resistant reaction to sheath rot in Boro season. So, these lines/varieties may be used as breeding material and cultivated for rice production.
  M. S. Rahman , M. A. H. Khan , M. M. Rahman and M. Ashrafuzzaman
  Effect of rice husk, sawdust, ash and burnt soils as mulches on the growth attributes of onion was studied. Significant variations were observed in plant height, root length, total dry matter accumulation, leaf area index (LAI), crop growth rate (CGR) and net assimilation rate (NAR), whereas relative growth rate (RGR) was found nonsignificant in all stages of growth. Root: shoot ratio was significantly different at the early stages of growth (30 to 60 DAT) and thereafter it was found nonsignificant. All the mulches had positive effect on growth attributes over the control and the use of ash as mulch was found better compared to the other three.
  Afia Akhtar , M. A. Rahman khokon , Bimal Kumar Pramanik and M. Ashrafuzzaman
  Eight cultivars of tomato were studied under field condition in insecticide treated and non treated plots to observe the performance of these varieties against leaf curl disease. The effect of this disease in percent plant infection, insect population per plant, percent leaf area diseased, number of fruits per plant, weight of individual fruit (g), yield per plant (kg) and yield loss due to leaf curl infection were investigated. None of the varieties was found to be resistant against viral leaf curl disease. But the cultivar Raton was found to be somewhat resistant both in controlled and treated plots. In controlled plots the second best performance was shown by Manik. The other varieties were more or less affected by leaf curl virus. In insecticide treated plots, second highest yield was observed in Manik and Roma-VF varieties indicating that the cultivar Roma-VF has the potential to perform as good as Manik when cultivated under insecticidal condition. The cultivar Anobic suffered more due to leaf curl viral disease in terms of yield parameters under both insecticide treated and non-treated plots. Vector management using Malathion, improved the growth and yield parameters of cultivars.
  Nazrul Islam , Bimal kumar Pramanik , Md. Atiqur Rahman Khokon and M. Ashrafuzzaman
  Fifteen advanced lines of tomato including two check cvs. `Manik` and `BARI-10` were assessed under natural epiphytotics for their performance to late blight (Phytophthora infestans) and early blight (Alternaria solani). The highest late blight disease incidence was found in V-52 & V-215 and the lowest in V-378. Two lines were found resistant (V-426 & V-259), two moderately resistant (V-187 & V-385), two were tolerant (V-282 & V-422), four moderately susceptible (V-378, V-138, V-258 and BARI 10), three were susceptible (V-330, V-201 and Manik) and two highly susceptible (V-52 & V-215), but none was found highly resistant. In case of early blight V-259 showed the highest and V-215 showed the lowest disease incidence. On the basis of early blight disease intensity, one was found resistant (V-52), three were moderately resistant (V-138, V-201 and V-215), six were moderately susceptible (V-378, V-282, V-330, V-426, V-422 and Manik), four were susceptible (V-187, V-385, V-258 and BARI 10), one was highly susceptible (V-259) and none was found highly resistant.
  Sukalpa Das , Md. Atiqur Rahman Khokon , Md. Manzurul Haque and M. Ashrafuzzaman
  Growing on test was conducted in aluminum trays and photographic cassette holders to determine the germination and seed transmission of jute leaf mosaic agent using five Corchorus capsularis cultivars. The test cultivars (D-154 and CVL-1) were grown in successive two years in a net house. Seeds collected from early-infected plants were used in the second year. Significantly higher percentage of seed transmission was obtained in the second year. Among the five test cultivars grown in two agro- ecological zones CVL-1 performed the best but none of the cultivars was free from leaf mosaic disease infection. Agro-ecological factors influenced the occurrence of the disease.
  Md. Liakot Ali , Md. Asad-ud-doullah , Bimal Kumar Pramanik and M. Ashrafuzzaman
  Soil treatment with Furadan at the rate of 33.5 kg ha-1, seedling treatments with skimmed milk (1:10 dilution of powder), foliar application of kitchen ash (sufficient to cover the foliage), Malathion and Metasystox at the rate of 0.02% and 0.03% respectively when applied in Tomato cv. Ruma VF, significantly reduced the insect vector population causing leaf curl disease. Malathion gave the best performance among the treatments in controlling disease incidence and severity. Metasystox and Furadan followed in order. The skimmed milk and kitchen ash also were effective.
  M. M. Bahadur , M. Ashrafuzzaman , M. F. Chowdhury and S. M. Shahidullah
  An experiment with five different plant densities ranging from 35,000 to 95,000 plants ha–1 was carried out to find out the optimum plant population that adapted well with the limited available resource. Barnli was used as the experimental cultivar. Observations were made on growth attributes, yield and yield components of maize. Leaf area index (LAI), total dry matter (TDM), biological yield and grain yield increased with plant density while plant height, leaf number per plant, stem diameter, time of flowering and maturity, cob per plant, 1000-grain weight, number of grains cob–1 responded negatively.
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