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Articles by M. Mofazzel Hossain
Total Records ( 3 ) for M. Mofazzel Hossain
  Mahfuj Ara Begum , Mahbuba Jahan , M.N. Bari , M. Mofazzel Hossain and N. Afsana
  Life cycle of Micraspis discolor (Fabricious), a predator of brown plant hopper (BPH), Nilaparvata lugens (Stal) was studied in the laboratory and its potentiality in biological control was investigated. A female M. discolor laid an average of 117.7 eggs in 25.1 days of oviposition period. Preoviposition period ranged from 5-10 days with an average of 6.6 days. The eggs hatched in 2-3 days with 83.7% hatching success. Predator had 4 larval instars requiring a total period of 12-15 days. Mean developmental period of the predator was 20.2 days. Male and female beetles lived for 27.4 and 32.4 days respectively. A predator larva consumed an average of 47.6 third instar brown plant hopper, while an adult beetle consumed an average of 112.6 BPH during 30 days after emergence. Predator, M. discolor both in larval and adult stage showed preference for second and third instar brown plant hopper.
  M. Mofazzel Hossain , M. Shahjahan , M. Mosaddeque Hossain and M.N. Bari
  The highest chlorophyll `a` content was recorded in the variety BLO 101 (0.74) and was found significantly different from other varieties/lines except BLO 114 and khotkhotia-1. The lowest amount of chlorophyll `a` content was observed in the variety Nayankajal (0.43), which was also significantly different from that of other varieties/lines. The chlorophyll `a` content was negatively correlated (-0.146) with brinjal shoot and fruit borer (BSFB) infestation. The highest chlorophyll `b` content was recorded at 70 DAT. The amount of chlorophyll `b` varied significantly among the varieties/lines at different ages. The lowest chlorophyll `b` content was recorded at 40 DAT (0.26) and it was statistically identical with that of 100 DAT (0.30). The average highest amount of chlorophyll `b` was estimated in the variety Dhohazari-1 (0.45), which was significantly different from that of other varieties/lines except BLO 45. The lowest amount of chlorophyll `b` was obtained in the variety Laffa (0.25), which was significantly different from that of all other varieties/lines. The highest amount of total chlorophyll contents was estimated in the variety BLO 114 (1.109) which was significantly different from that of other varieties/lines. The average lowest amount of total chlorophyll was estimated in the variety Nayankajal (0.83) with the highest infestation.
  M.M. Rashid , M.Z. Alam , M. Mofazzel Hossain , M. Ibrahim and M.H. Kabir
  The present study was carried out to investigate indirect damage of guava leaf in the form of wax and honeydew covering by the spiraling whitefly (Aleurodicus dispersus) was investigated in a guava orchard, Mymensingh, Bangladesh. Extent of leaf damage in twigs of different strata indicated that the upper most twigs had minimum wax and honeydew-covered leaves than the other twigs of guava plants. The results of the study on variation of leaf damage in different leaf position of twig showed that at early attacking stage the mean percentage of wax and honeydew covered leaves, was significantly higher in upper leaf position than in the middle and the lower leaf position and had the lowest level of whitefly infestation in the lower leaf position of the guava twigs. Results showed that with the build up of population in the month of December and January, wax and honeydew covered leaves were more in middle leaf position. The lower wax and honeydew covering in upper position were recorded in the later months due to rain and rapid growth of new flush, which remained non-infested.
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