http://localhost:8080/handle/123456789/2131 2026-04-18T16:17:05Z 2026-04-18T16:17:05Z Islam, M. R. Meah, M. B. Islam, M. R. Islam, M. M. Faruq, A. N. http://localhost:8080/handle/123456789/2147 2019-01-10T04:20:02Z 2009-01-01T00:00:00Z

STUDIES ON SOME PHYSIOL(x;ICAL ASPECTS OF Phomopsis vexans CAUSING PHOMOPSIS BLIGHT AND FRUIT ROT OF EGGPLANT Islam, M. R.; Meah, M. B.; Islam, M. R.; Islam, M. M.; Faruq, A. N. The effect of temperature. light, culture media and pH on the mycelial growth and sporulation behaviours of Phomopsis vexans, causal organism of Phomopsis blight and fruit rot of eggplant were studied in the laboratory. The pathogen grew best at 25°C, under 12112h cycle light and pH 5.5 levels of culture media. Number of spores per millilitre was also maximum at 25°C temperature, 12112h cycle light and at pH 5.5. Eggplant Fruit Extract Agar media gave the maximum growth and sporulation of P. vexans. Two types of conidia, u (alpha) and [l (beta) were detected in P. vexons. Five groups of isolates showed variation in growth and sporulation under different levels of temperature, light, culture media and pH. Alpha and beta conidia varied in size for live isolates groups. Existence of variation in isolates of P. vexans revealed the existence of the variability of P. vexons occurs in Bangladesh.

2009-01-01T00:00:00Z Islam, M. K. Saha, M. K. Mondal, M. A. A. Rahman, M. M. Sarker, M. A. I. http://localhost:8080/handle/123456789/2146 2019-01-10T04:08:47Z 2009-01-01T00:00:00Z

EFFICACY OF HERBICIDES PANIDA 33 EC (PENDIMETHALIN) AND NEON 70 WG (METRIBUZIN) IN POTATO FIELDS Islam, M. K.; Saha, M. K.; Mondal, M. A. A.; Rahman, M. M.; Sarker, M. A. I. A field experiment was conducted at On-farm research station, Rangpur, BAR I during rabi season of 2005-06 and 2006-07 to find out the optimum rate of herbicides and time of application against weeds in potato fields. Herbicides Panida 33 EC (pendimethalin) and Neon 70 WG (metribuzin) were evaluated through post planting pre-emergence and post emergence (9 days after planting) spraying with different rates on weed management in potato fields. Post planting post emergence spraying of Panida 33 ECC and Neon 70 WP controlled all broad leaf weeds. Among the different rates of herbicides Panida 33 EC @ 10 up to 3.0 liter and Neon 70 WG @ 750 up to 1000g ha showed similar results in controlling broad leaf weeds particularly of Chenopodium album (Bathua), Amaranthus viridis (Shaknotey), Alternanthern philoxeroides (Maloncho). Lindernia anagallis (Panigas), Gnaphulium affine (Bonocopy), Om/is europea (Amrul) and Glil/IIS lotoides (Carpet agacha). Yield of potato tubers in the year 2005-06 was significantly increased up to 51 and 49 % over control by spraying Panida 33 EC @ 3.0 liter and Neon 70 WG @ 1000 g ha", respectively at 9 DAP. Similar result was also observed by spraying Panida 33 EC @ 1.0 liter and Neon 70 WG @ 750 g ha'. In the year 2005-06. the highest tuber yield (21.24 t ha") was recorded from weed free plot which was statistically similar with post emergence Panida 33 EC @ I I ha (19.00 t ha") and post emergence neon 70 WG @ 750 g ha (20.16 t ha'). Similar trend was also observed in next year. Post planting post emergence (9 DAP) spraying of Panida 33 EC @ 1.0 I ha and Neon 70 EC @ 750 g ha in potato fields are most effective in controlling broad leaf weeds like Chenopodium album, Amaranthus viridis, Alternanthera philoxeroides. Gnaphalum affine. Oxalis europca and Glinus lotoides.

2009-01-01T00:00:00Z Maniruzzaman, M. Zaman, M. W. Islam, M. K. http://localhost:8080/handle/123456789/2145 2019-01-10T04:02:31Z 2009-01-01T00:00:00Z

ASSESSMENT OF NUTRIENT STATUS OF THE FOREST SOILS AS COMPARED TO CULTIVATED SOILS OF THE SUNDERBANS OF BANGLADESH Maniruzzaman, M.; Zaman, M. W.; Islam, M. K. An investigation was carried out to determine the nutrient status of soils of the Sundarbans of Koyra Upazila under Khulna district. Forest soils of the Sundarbans receive seawater at a regular interval. but the cultivated land inside the embankment never receives seawater. To investigate the impact of seawater on nutrient status of the forest soils as compared to cultivated soils inside the embankment, soil samples from the above two areas were collected at two different depths, surface (0-15 ern) and sub- surface (15-30 cm). The chemical analyses included soil p+I, Ee, organic matter, N. P. S. K. Ca. Mg. Na, B. Zn, Cu. Fe and Mn content in soils. The soils of the mangrove forest of Koyra Upazila were saline. but the cultivated soils adjacent to the Sundarbans (inside the embankment) were acidic to saline. EC values were higher in mangrove forest soils than cultivated land and both the pH and EC were higher in surface soils. The organic matter. N, P and S contents were higher in surface soils than that of sub-surface soils. The status of Ca, Mg and K were higher in sub-surface soils than that of surface soils. The levels of N, Ca, Mg. Na, B, Cu and Mn were higher in forest soils than that of cultivated soils. But the concentrations of Fe, P, Sand Zn were higher in cultivated soils than that afforest soils. The level of S in cultivated land was 401.4 mg kg". The low pH (5.3 to 7.3) and higher amount of S04-S indicated that the soils of cultivated land were acid-sulphate. The concentrations of micronutrients were comparatively higher in surface soils than that of sub-surface soils.

2009-01-01T00:00:00Z Rashid, M. H. Khalekuzzaman, M. Hossain, M. S. Rahman, M. S. Hasan, M. F. http://localhost:8080/handle/123456789/2144 2019-01-10T03:57:00Z 2009-01-01T00:00:00Z

CALLUS INDUCTION AND PLANT REGENERATION IN ONION (Allium cepa L.) FROM SHOOT TIP EXPLANT Rashid, M. H.; Khalekuzzaman, M.; Hossain, M. S.; Rahman, M. S.; Hasan, M. F. An efficient protocol for callus induction and plant regeneration was established from shoot tip explant in onion (Allium cepa L.). Shoot tip from field-grown onion bulbs of Taherpuri and Indian cultivars were used as experimental materials in this investigation. Different concentrations of 2, 4-0 or NAA were used in MS medium for callus induction. The highest percent (86.6%) of callus induction was 86.6 in Taherpuri and in Indian (80%) cultivar in MS media containing 1.5 mg/I of 2,4-0 within fourteen to sixteen days of culture. Different concentrations and combinations of cytokinins (BAP and KIN) and auxins (NAA and lBAl were used for primary establishment of shoot tip. Maximum shoot proliferation was obtained after subculturing the callus in MS medium supplemented with 1.5 mg/l KIN + 1.5 mg/I of BAP within 20 days of callus culture. The highest percentage (100%) of root induction was achieved in Taherpuri cultivar on medium supplemented with 1.0 mg/l of NAA from in vitro raised shoots. Regenerated plantlets were successfully transferred on to the natural condition and showed healthy growth.

2009-01-01T00:00:00Z