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Articles by M. Rafiqul Islam
Total Records ( 6 ) for M. Rafiqul Islam
  M. Rafiqul Islam
  An investigation was undertaken to study the effect of different levels of chemical and organic fertilizers on the growth, yield and protein content of two wheat varieties. Two varieties of wheat were tested. Aghrani and Kanchan with five levels of chemical and organic fertilizer viz. F1 (control), F2, F3, F4 and F5. Urea was applied in 2 splits in F1 and in 3 splits in F2 to F4 as per recommendation. In F5, it was applied in 4 equal splits. In F1, inorganic fertilizers were applied @ 100 kg N, 36 kg P, 25 kg K and 20 kg S/ha. In F2 to F5, fertilizers were applied @ 120 kg N, 27 kg P, 83 kg K, 30 kg S and 4 kg Zn/ha. Grain Yield and protein content was higher in Kanchan than Aghrani variety. Among the different levels of fertilizer application, F5 had superior performance on all the parameters, whereas, F1 had the most inferior effect on all the parameters including grain and straw yields. The yield, yield contributing characters and protein content of wheat increased with increase in the levels inorganic fertilizers, addition of composts with fertilizer and also by increasing split application of nitrogen.
  M. Shahidul Alam , Most-Ferdousi Begum , Montaz Alil Sarkar , M. Rafiqul Islam and M. Shah Alam
  Botryodiplodia theobromae Pat., is the causal organism of crown rot disease of banana. This fungus grew and sporulated at 10-40 °C, the optimum being 25-30 °C and the highest mycelial growth (78-90 mm) and sporulation (27-38 conidia/0.01 ml) were observed on PDA. There was no growth of the organism at 10 and 45 °C. Light was not necessary for growth, but it enhanced the sporulation. Maximum pigment formation occurred on PDA (Black 75% and White 25%) and minimum on PCM (Black 10% and White 90%). Formation of pycnidia initiated on 6th day in all the media, except Sabouraud`s medium. Maximum pycnidia formation occurred on Czapek`s (35/plate) medium and minimum on PCM (6/plate) medium. In case of glucose added PA medium, maximum pigment formation occurred on 35 gm of glucose added PA medium and minimum on PA medium. The highest mycelial growth was observed on PA medium (168 mm) and the lowest (54 mm) on 35 gm of glucose added PA medium. The highest number of pycnidia formed on PA medium (38/plate) and the lowest on 30gm glucose added PA medium (3/plate). There was no pycnidia formed on 35 gm glucose added PA medium.
  M. Shahidul Alam , M.S. Alam , M. Rafiqul Islam , Most. Ferdousi Begum , Montaz Ali Sarkar and M. Sabina Banu
  Six types of poultry feed ingredients viz. maize, rice bran, sesame oil cake, soybean oil cake, wheat husk and oyster shell were used for determination of the presence of fungal flora. Eight genera of fungi have been isolated and identified. The genus Aspergillus was the highest in frequency followed by Penicillium, Rhizopus, Fusarium, Paecilomyces, Scopulariopsis, Alternaria and Candida. Sesame oil cake was the highest contaminated (43.15%) and oyster shell was the lowest (3.06%). Fungal contamination of poultry feed ingredients increased with the increase in their moisture content and storage period.
  Shahidul Alam , Nargis Akhter , Most. Ferdousi Begum , M. Sabina Banu , M. Rafiqul Islam , Arfatun Nahar Chowdhury and M. S. Alam
  Inhibition of spore/conidial germination of four fungi viz., Bipolaris sorokiniana, Fusarium oxysporum f. sp. vasinfectum, Rhizopus artocarpi and Botryodiplodia theobromae was tested using the extracts of different parts of Vinca rosea and Azadirachta indica and smoke of rice straw, wheat straw, tobacco leaf and "dhup" (incense) and showed good results in their inhibition. Vinca rosea root extract inhibited 100% spore germination of Bipolaris sorokiniana and Rhizopus artocarpi when it was immersed from 5-30 minutes at 5:1.25 (w/v) concentration. A. indica (leaf, root and seed) extracts showed good (100%) inhibition results on B. sorokiniana, and R. artocarpi. Smoke of rice straw, wheat straw, tobacco leaf and ?dhup? had a great antifungal effect against these fungi.
  Shahidul Alam , M. Sabina Banu , M. Forman Ali , Nargis Akhter , M. Rafiqul Islam and M. S. Alam
  Six fungicides viz., cupravit, thiovit, dithane M-45, bavistin, rovral and suncozeb were tested against C. gloeosporioides. Dithane M-45, rovral, thiovit and suncozeb were the most effective ones. Cupravit and bavistin were less effective in the inhibition of conidial germination. Ten plant-extracts considered as fungicides were tested, out of which Tagetes erecta leaf and Azadirachta indica bark extracts were the most effective in inhibiting Colletotrichum gloeosporioides after 5-30 minutes of immersion and in 5:1.25 (w/v) concentration. The phytohormone IAA had great effect against the inhibition (100%) of C. gloeosporioides at 0.005 to 0.006% concentration for an immersion after 5-30 minutes. Rest of the hormones also had good effects against C. gloeosporioides.
  M. Mahbubul Alam , Md. Mainul Basher , A. Karim , M.A. Rahman and M. Rafiqul Islam
  An experiment was conducted during the period from April to July 2001 to find out effect of 3 levels of plant population (53000, 66000, 80000 plants ha-1) and 4 levels of nitrogen fertilizer (100, 140, 180 and 220 kg ha-1) in silty clay loam soil. The results showed that the yield and yield attributes characters varied significantly due to the variation in population densities and nitrogen rates. The lower plant population (53000 plants ha-1) produced higher cobs plant-1, cob length, grains cob-1 and 1000-grain weight, but the higher plant population (66000 and 80000 plants ha-1) resulted significantly higher grain yield than lowest plant population. The increasing level of nitrogen improve the yield and yield attributes. Maximum values of yield attributes and that of grain yield were with the 2nd highest level of nitrogen (180 kg N ha-1). The highest grain yield (5.03 t ha-1) was recorded from 80000 plants ha-1 with 180 kg N ha-1.
 
 
 
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