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ABSTRACT: The production of mungbean [Vigna radiata (L.)] is adversely affected by drought in the tropics and sub-tropics. This study investigated the physiological responses of six mungbean varieties viz. BUmug 2, BUmug 4, BARI Mung-5, BARI Mung-6, Binamoog-5 and Binamoog-8 to non-stress (80% of field capacity) and water deficit (50% of field capacity) conditions. The experiment was laid out in a completely randomized design having four replications at the research field of Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur. The variety Binamoog-5 showed the highest level of physiological parameters related to drought tolerance, such as proline content (32.57%), xylem exudation (577.00 mg hr-1 and 383.70 mg hr-1) and total chlorophyll content (2.65 mg g-1 and 2.81 mg g-1) at preflowering and pod development stage, photosynthesis (38.94 μmol m-2 s-1 CO ), transpiration (15.00 mg H O/dm2/h), and relative water content (66.14%), whereas that showed the lowest level of cell membrane thermostability (63.8%) under water stressed condition, followed by Binamoog-8. The measured physiological characteristics of other varieties were affected noticeably. Therefore, Binamoog-5 may be considered as a2 resource for drought tolerant genetic material.
Keywords: Proline, water relation, mongbean, photosynthesis
Post Time: 2 years ago
ABSTRACT: The study was conducted in the farmer’s mustard field near the campus of Hajee Mohammad Danesh Science and Technology University, Dinajpur-5200, Bangladesh from November 2020 to March 2021 to identify the insects involved in pollination of mustard and to know their relative abundance. A total number of 24 pollinator insects belonging to 15 families (Apidae, Andrenidae, Halictidae, Scoliidae, Tenthredinidae, Muscidae, Calliphoridae, Rhiniidae, Syrphidae, Arctiide, Crambidae, Nymphalidae, Pieridae, Plutellidae and Coccinellidae) and 4 orders (Hymenoptera, Diptera, Lepidoptera and Coleoptera) were observed associated with mustard (Brassica rapa)crop on BARI Sarisha-17. Among the orders, the Hymenoptera, Diptera, Lepidoptera and Coleoptera were found as 49.8%, 42.0%, 7.4% and 0.6%, respectively. However, Hymenopterans insects were evident the pre-dominant floral visitors. Indian honey bee, Apis cerana showed the highest abundance (23.2%) followed by Rock bee, Apis dorsata (13.8%), Rhiniid blowfly, Stomorhina sp. (10.5%).
Keywords: Diversity, pollinator insects, mustard
Post Time: 2 years ago
ABSTRACT: Mungbean [Vigna radiata (L)], an important grain legume in Bangladesh, is grown during kharif1 (pre-monsoon) season, when drought is a common abiotic stress. This study was thus conducted in pots inside semi-controlled vinylhouse to assess the effect of water stress on growth and yield of some popular mungbean varieties, viz. BUmug 2, BUmug 4, BARI Mung-5,BARI Mung-6, Binamoog-5 and Binamoog-8. Two water regimes,80% field capacity (FC; non-stress) and 50% FC (water stress)were maintained. The experiment was laid out in a completely randomized design having four replications. Under water stress the variety Binamoog-5 had the largest leaf area (850.4 cm2), while BUmug 4 had the smallest (695.1 cm2). At maturity the reduction of shoot dry weight due to water stress was the highest in BUmug 4 (20.6%) while that was the lowest in Binamoog-5 (12.5%). The highest reduction of pod numberdue to water stress was recorded in BUmug 4 (45.1%) and the lowestwas in Binamoog-5 (32.9%) followed by Binamoog-8 (34.5%). The highest reduction in seed number pod-1 due to water stress was in BUmug 4 (21.8%) and the lowest was in Binamoog-5 (16.79%). Water deficit did not exert significant effect on 100-seed weight in the varieties except BUmug 4. Binamoog-5 had the maximum yield plant-1 under both control (12.8 g) and water deficit (7.4 g) conditions followed by Binamoog-8, while BUmug 4 had the lowest in both control (11.6 g) and water deficit (6.3 g) conditions. It was concluded that Binamoog-5 and Binamoog-8 can be potential varieties for field trial for cultivation under water deficit conditions.
Keywords: Morphology; growth parameters; Vigna radiate; water stress, yield components
Post Time: 2 years ago
ABSTRACT: The Mathabhanga river has abundantfish resources, which plays a significant role in maintaining and replenishing the fish resources. The study was conducted from March to October, 2019 by a questionnaire survey and socio economic study of the fishermen in the Chudanga district. However, fish bio-diversity has rapidly declined in the Mathabhanga River. In this study, 44 fish specieswere found in the Mathabhanga River belonging to eight orders, 18 families and 29 genera. According to the IUCN Red List, 24.99% of fish species were threatened. Among the threatened species, 13.63% were vulnerable, 9.09% endangered and 2.27% were critically endangered. About 45% of fishermen were illiterate and housing condition of fishermen were dominated by tin-shed with bamboo (65%). A significant proportion of fishermen depend upon village doctors (62%) and 86% of the fishermen were far from power plants. Majority (45%) of fishermen were landless and 75% of fishermen were engaged in fishing as their main occupation whereas 65% of the fishermen had annual income between Tk. 35000 to Tk. 55000. In addition, overall values of diversity richness and evenness indices were found 1.12, 4.99 and 0.57,for vulnerable, endangered, and critically endangered species, respectively. These results indicated that dam construction and other human activities have seriously destroyed the fish habitat and led to the decline in fish diversity. Therefore, the conservation of fish has become urgent in the Mathabhanga River, and an integrated management plan should be developed and effectively implemented.
Keywords: Catch composition, Margalef’s richness index, Pielou’s evenness index, Shannon-weaver diversity index, Livelihood
Post Time: 2 years ago
ABSTRACT: Cowpea, known as a food crop, demonstrates thrive on land with low soil fertility. Albina IPB is a new superior variety of cowpea with a potential yield of 3.88-4.69 t ha-1. This study aims to evaluate the productivity of Albina based on differences in the number of seeds and fertilization. Minus one test method was applied to find out which nutrients among N, P, and K had the most influence on the growth and production of cowpea. The results showed that one seed per planting hole gave the best results which were significantly different from others, while the combination of three seeds per planting hole with minus K resulted in the lowest growth in general. Nevertheless, anthocyanin in the combination of three seeds per planting hole with minus K produced the highest value, significantly different from the other treatments. These results indicate that element K is a limiting element in the growth of cowpea. However, neither the fertilization treatment nor the number of seeds was significantly different in the yield and yield components. Plant productivity ranged from 0.82-1.42 t ha-1 for all treatments.
Keywords: Anthocyanin, minus one test, photosynthesis, plant density, plant nutrition, potassium, yield
Post Time: 2 years ago
ABSTRACT: This study was carried out to investigate the productive and reproductive performances following oral supplementation of dicalcium phosphate (DCP) in different crossbred and local dairy cows. A total of 64 dairy cows of different genetics were selected for the study. All the cows were divided into four different groups and each group consists of 16 cows, namely Local (L), Local ×Holstein Friesian (L×HF), Local × Sindhi (L×S) and Local×Sahiwal (L×SA). Each group of dairy cows were again subdivided into two subgroups like control and DCP supplement group. We assessed the productive performances such as milk production and lactation length, as well as reproductive performances such as service per conception, post-partum heat period and calving intervals among different breeds of cows as well as in the matching DCP supplement group. The productive performance among the different groups of cows i.e. L×HF, L×S, L×SA and Local cows were found significantly (p<0.01) different. Interestingly, DCP supplement group showed a significant increase of productive performances compared with the control group. Likewise, reproductive performance such as service per conception in different crossbred and Local cows also decreased significantly (p<0.01) with DCP supplement group than the control. Contrarily, the post-partum heat period and calving intervals in different crossbred and Local cows were slightly lower in the DCP supplemented group than control that did not differ significantly. Therefore, the study reveals that L×HF crossbred were found to be better performer followed by L×SA, L×S and Local cows, and DCP supplementation improve all the parameters studied irrespective of genetic variation.
Keywords: Dicalcium-phosphate, reproduction, dairy cows, reproductive performances.
Post Time: 2 years ago
ABSTRACT: Ash gourd Benincasa hispida Thumb., a cucurbit vegetable, faces frequent infestation of red pumpkin beetle and cucurbit fruit fly. Farmers in Bangladesh mainly apply conventional synthetic insecticides to protect crops from the attack of these pests. The current study was conducted in the experimental field of the Department of Entomology, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur during March 2021 to July 2021 to know the effects of five biorational insecticides, namely Biotrin (matrine), Proclaim (emamectin benzoate), Sunmectin (abamectin), Mahogany oil and Neem oil on the abundance and infestation of red pumpkin beetle and fruit fly infesting ash gourd. The insecticides were applied 3 times maintaining 7 days interval. Results showed significant reduction of the insect population compared to untreated control. Sunmectin (1.55±0.34) treated plot showed the lowest abundance of red pumpkin beetle after the 3rd spray with 65% reduction of population compared to untreated control plot. Biotrin (8.59±1.00%) treated plot showed the lowest leaf and flower infestation by red pumpkin beetle after 3rd spray, with the reduction (69% in both) over control. The lowest fruit infestation was found in Sunmectin treated plot (23.01±8.05%). The highest yield of ash gourd (17.9 T/ha) was recorded from Sunmectin treated plot which showed statistical similarity to Proclaim (16.01 T/ha) and Biotrin (15.90 T/ha) treated plots with 3.5, 2.5 and 2.6 benefit cost ratio, respectively. Therefore, it could be concluded that Sunmectin, Proclaim and Biotrin were more effective to control the infestation of red pumpkin beetle and fruit fly of ash gourd than the other tested insecticides.
Keywords: Aulacophora foveicollis, Bactrocera cucurbitae, Benincasa hispida, biorational insecticides
Post Time: 2 years ago
ABSTRACT: Mango production in Bangladesh is enormously affected by the infestation of hopper which punctures and sucks sap from tender shoots, inflorescences, and leaves of mango tree, causing non-setting of fruits and dropping of immature fruits. Control of mango hopper in recent days is solely done by synthetic insecticides. This study was conducted in the laboratory during January to October 2022 to know the toxicity of four commonly used insecticides, namely Desis 2.5 EC (Deltamethrin), Ripcord 10 EC (Cypermethrin), Relothrin 10 EC (Cypermethrin), and Sumithion 50 EC (Fenitrothion) on mango hopper. The doses of Desis 2.5 EC, Ripcord 10 EC and Relothrin 10 EC were prepared as 1200, 1000, 750, 500 and 100 ppm, and Sumithion 50 EC solutions were 2500, 2200, 1500, 1000 and 500 ppm. Results showed that the tested insecticides with their recommended doses revealed 51.4±2.5 to 70.6±1.8% mortality of hopper at 4 hours after treatment where Desis 2.5 EC showed the highest mean mortality of the insect. Desis 2.5 EC also showed the lowest LC and LC values (426.0 and 4331.4 ppm, respectively at 4 hours after treatment) signifying its higher effectiveness compared to other tested insecticides.
Keywords: Hopper, Mangifera indica, mortality, synthetic insecticides, toxicity
Post Time: 2 years ago
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