Uniting Life, Social, and Natural Sciences in Ecological Exploration
Bridging Borders: International Research, Local Impact
Beyond Theory: Practical Insights and Technical Advancements
Synthesizing Knowledge, Pioneering Tomorrow's Solutions
Strengthening Research Integrity, Fostering Collaboration
ABSTRACT: The study was conducted in four districts viz., Rajshahi, Noagaon, Chapainawabganj and Natore through pretested questionnaire survey among the target farmers, i.e. 30 farmers per district to gather information on existing socio-economic aspects of maize cultivating farmers as well as their opinion on maize insects pests and insecticide application against those pests. Most of the farmers are middle to old aged with primary to secondary level of education, small to medium farm size, small to medium family size with good farming experiences and medium to high level of annual income. According to the farmer’s opinion, cutworm was detected as severe, while fall armyworm, stem borer, pink stem borer and cob borer were the major, and aphid was found as minor insect pests of maize in the survey area. For combating those insect pests, farmers mainly use Chlorpyrifos (50%) + Cypermethrin (5%) against cutworm and fall armyworm as well as Thiamethoxam (20%) + Chlorantraniliprole (20%) against stem borer, pink stem borer and cob borer.
Keywords: Survey, monitoring, fall armyworm, maize stem borer, Barind tract
Post Time: 2 years ago
ABSTRACT: The study was conducted in four upazilas, namely Ullapara, Shahzadpur, Tarash and Belkuchi of Sirajganj district to analyze the cost and return of mustard and sesame cultivation. Thirty mustard and thirty sesame producing farmers were purposively selected from each upazila and thus sample size was 240 for the study. Primary data were collected from the respondents through well-organized structural questionnaire. Data were sorted, scrutinized and analyzed to evaluate economic performance of mustard and sesame cultivation. Cost of cultivation was calculated based on variable and fixed cost basis. Return was measured in form of gross return, gross margin, net return and benefit cost ratio (BCR). Results of the study revealed that cultivation cost of mustard was higher (Tk. 53932 ha-1) than sesame (Tk. 39993 ha-1). Gross return, gross margin, and net return from mustard cultivation were estimated as Tk. 60120, Tk.15827 and Tk. 6188 ha-1 respectively. While, those were Tk. 70400, Tk. 42046 and Tk. 30407 ha-1, respectively for sesame cultivation. The estimated BCR was 1.11 for cultivation of mustard and 1.76 for cultivation of sesame, which indicated that sesame cultivation is more profitable compared to mustard in the study area.
Keywords: Oilseed crops, cost, gross margin, net return, benefit cost ratio
Post Time: 2 years ago
ABSTRACT: The aim of the present study was to examine the involvement of food availability on reproductive activity in a fresh water catfi sh Mystus cavasius, locally known as gulsha. Fish undergoing active reproduction were reared with saturated feed (SF; 1.5-2.0% of body mass) and limited feed (LF; one-tenth of SF) under natural photoperiod and temperature. Reduction of food ration aff ected ovarian development during the reproductive season in this species. The limited feeding resulted in signifi cant decreases in gonadosomatic index (GSI) within 15 days with disappearance of vitellogenic oocytes from the ovaries. When the LF-reared fi sh were re-fed with SF, their GSI was increased and vitellogenic oocytes re-appeared within 15 days. When these two feeding levels were crossed with 20, 25 and 30 0C temperature regimes, the fi sh maintained better ovarian conditions at 30 0C than those at 20 and 25 0C, but not under LF conditions, suggested that minimum and maximum temperatures infl uenced the reproductive performance of the studied fi sh.
Keywords: Catfi sh, food availability, histology, ovarian development, reproduction
Post Time: 2 years ago
ABSTRACT: The experiments were conducted to observe the infestation of different insect pests on some promising sugarcane clones under natural condition. Considering different cropping seasons, the average lowest infestation was occurred by early shoot borer (1.33%) and the highest by rootstock borer (48.47%). The average infestation level of different insect pest on some promising sugarcane clones revealed that the lowest was by early shoot borer, black beetle, top shoot borer, stem borer (stalk), stem borer (internode), rootstock borer, mealy bug and scale insect in the clones I 212-11 (0.69%), I 198-11 (1.30%), I 106-11 (6.18%), I 106-11 (10.53%), I 131-10 (15.05%), I 106-11 (37.93%), I 103-10 (17.44%) and I 103-10 (2.36%), respectively. It was revealed that among the clones I 106-11 provided the best performance in respect of different major insect pest infestation, and this clone may be released as BSRI Akh 48 variety for commercial cultivation in sugarcane growing areas of Bangladesh.
Keywords: Promising clone, sugarcane, major pest, infestation
Post Time: 2 years ago
ABSTRACT: The biorational insecticides namely Biomax 1.2 EC, Ripcord 10 EC, Sunmectin 1.8 EC, Spinosad 12.5 SC, Mahogany oil, Neem oil, and Detergent (Veem liquid) with concentrations of 1 ml/L, 2 ml/L, 2 ml/L, 2 ml/L, 5 ml/L, 5 ml/L and 20 ml/L of water, respectively were applied to manage jassid and whitefly attacking tomato ( Solanum lycopersicum ) plants. The efficacy of the biorational insecticides was compared to control treatment (untreated). Results showed that the biorational treatments significantly reduced the incidence of jassid and whitefly, and exerted lower level of virus infection compared to the control. The biorational treatments did not affect the level of K, Ca and Mg contents of the fruit and presented significantly higher amount of yield and benefit-cost ratio than that of control. The biorational treatment Sunmectin 1.8 EC showed the lowest abundances of whitefly and jassid, and revealed the lowest level of virus infected plants, leaves and fruits. The plants treated with Sunmectin 1.8 EC resulted the highest yield (58t/ha) and benefit cost ratio (6.1). The tested biorational approaches specially Sunmectin 1.8 EC may be used as a tool of integrated management program of sucking pests of tomato like jassid and whitefly.
Keywords: Biorational insecticide, Solanum lycopersicum, jassid, whitefly, yield
Post Time: 2 years ago
ABSTRACT: Efficacy of seven acaricides namely Haysulf DF 80%, Ethiosul 46.5EC, Aimcoflo 80WDG, Thiovit 80WDG, Ambush 1.8EC, Omite 57EC and Sharper 5WDG with concentrations of 0.13%, 0.06%, 0.35%, 0.06%, 0.04%, 0.06% and 0.05%, respectively were evaluated against jute yellow mite Polyphagotarsonemus latus. The investigations were done in the Jute Agriculture Experimental Stations at Dhaka and Manikgonj during the jute season 2014. Sharper 5WDG showed the highest mortality rate of mite at 24, 48 and 72 hours after treatment and the mortally was 86.8%, 94.0% and 95.7%, respectively. All the acaricides revealed significantly lower rates of plant infestation compared to control, and the Sharper 5WDG exerted the lowest infestation in both the stations. The acaricide treatments significantly increased height and base diameter of plants, and yield in both the stations compared to control. The increased yield over control at Dhaka and Manikgonj ranged from 24.2% to 35.1% and 25.3% to 45.1%, respectively. The tested acaricides showed significant efficacy against jute yellow mite and the most effective result was obtained with Sharper 5WDG.
Keywords: Acaricide, Polyphagotarsonemus latus, infestation, mortality, yield
Post Time: 2 years ago
ABSTRACT: Laboratory experiment was conducted to determine physiological qualities of jute seed produced at different sowing dates and locations. The jute seeds were obtained from three genotypes (O-72, O-3820, Acc.4311) and sown at three dates (31 July, 15 August, 30 August) over four locations (Manikgonj, Cumilla, Dinajpur, Joshore) of Bangladesh. Seed quality of freshly harvested jute seed was assessed by germination test, mean germination time, vigour index and electrical conductivity test. Germination percentage of fresh jute seed was not profoundly influenced by the interaction effect of genotype and sowing date over the locations, where all the genotypes showed more than 94% seed germination. However, mean germination time was significantly influenced by the various genotypes and different sowing dates. The highest mean germination time (1.370 days) was found from the seed of genotype Acc.4311 sown on 30 August at Cumilla, while the lowest mean germination time (1.011 days) was recorded from the seed of genotype O-72 harvested from the crop sown on 15 August at Manikgonj. The highest vigour indices were observed in genotype Acc. 4311 from seed harvested from different locations. Significant variation was also observed in electrical conductivity of seed leachate, where the highest electrical conductivity of seed leachate (395 µS cm-1) was found from the seed of O-72 sown on 30 August at Cumilla. Contrary, the lowest electrical conductivity of seed leachate (295 µS cm-1) was recorded from the seed of Acc. 4311 sown on 15 August at Manikgonj. Among the genotypes, Acc. 4311 sown on 15 August in different locations showed better physiological seed qualities and may be considered as a promising line for variety development and quality seed production.
Keywords: Genotype, sowing date, seed quality, late jute
Post Time: 2 years ago
ABSTRACT: The study was conducted to control sugarcane stem borer by using the chemical insecticides Virtako 40WG (Thiamethoxam + Chlorantraniliprole) and Cidan 4G (Cartap hydrochloride). Virtako 40 WG was applied 200 g/ ha and 300 g/ha, and Cidan 4G was applied 75 kg/ha. Findings showed that Virtako 40 WG applied in soil thrice in a season 300 g/ha followed by Virtako 40 WG applied on plants thrice in a season 200 g/ha significantly reduced the abundance of stem borer infestation.
Keywords: Cidan 4G, Chilo tumidicostalis, dose, infestation, Virtako 40WG.
Post Time: 2 years ago
ABSTRACT: The study was conducted to assess the seasonal incidences of budworm Helicoverpa virescens (Lepidoptera: Noctuidae) and bagworm Thyridopteryx ephemeraeformis on rose and thuja plants, respectively. The study also investigated the effect of the chemical insecticides Proclaim 5SG and Talstar 2.5EC on the abundances of the above mentioned insect pests. The findings revealed that both the insects pests occurred from December to May. However, budworm reached to the peak abundance in the month of January, while bagworms reached the peak in March. Multiple regression analysis revealed that the weather parameters collectively influenced 10.3% and 11.2% incidences of budworm and bagworm, respectively. The individual as well as combined effect of the meteorological parameters on both the pests were insignificant. Proclaim 5SG and Talstar 2.5EC with their recommended doses significantly reduced the abundances of budworm and bagworm on the infested rose and thuja plants, respectively. The tested insecticides could be a tool for integrated management of rose budworm and thuja bagworm.
Keywords: Abundance, Helicoverpa virescens, Proclaim 5SG, Talstar 2.5EC, Thyridopteryx ephemeraeformis, weather factors
Post Time: 2 years ago
ABSTRACT: Grain growth and seed quality of five soybean Glycine max (L.) Merril] genotypes, namely BARI soybean-6, BU soybean1, BD2329, BD2331 and AGS313 were analyzed using randomized complete block design with three replications. Genotypic differences in seed growth indicated that seed of BU soybean1 ceased to grow at 36 days after anthesis (DAA), while seed growth in BARI soybean-6, BD2329, BD2331 and AGS313 continued up to 40, 38, 42, and 48 DAA, respectively. Seed development concurrently decreased seed moisture content of the genotypes. Seed moisture content began to decrease from 8, 12, 12, 10 and 9 DAA, and the highest viability was found on 36, 39, 36, 26 and 40 DAA in BU soybean 1, BARI soybean-6, BD2331, BD2329 and AGS 313, respectively. The lines of moisture content and that of viability intercepted on 22, 28, 22, 22 and 26 DAA in BU soybean1, BARI soybean-6, BD2331, BD2329 and AGS 313, respectively. BU soybean 1 showed the maximum protein content (44.19%), while AGS313 had the least (37.29%). The highest amount of Ca (0.49%) was observed in AGS313 and the lowest was found in BU soybean1 (0.37%). There was no significant difference among genotypes in Mg content, except BU soybean1 which had the lowest (0.19%). P content was the highest (0.39%) in AGS313, while the lowest was in BD2331 (0.19%). It was concluded that BU soybean1 is the earliest variety having the highest protein content.
Keywords: Genotypic difference, nutrient content, seed development, seed viability
Post Time: 2 years ago
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