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Reaction of pulse beetle, Callosobruchus chinensis L. to 20 genotypes of pulses belonging to lentil (Lens culinaris Medik.), mungbean (Vigna radiata (L) R. Wilczek), chickpea (Cicer arietinum L.) and blackgram (Vigna mungo (L). Hepper) was evaluated in no choice test in the laboratory of the Department of Entomology, Bangladesh Agricultural University, Mymensingh for observing the number of eggs deposition on seeds and percentage of damage of seed. Highest (73.1) number of eggs was laid on chickpea, while the lowest (19.5) was in blackgram. The results revealed that all the genotypes of chickpea were found to have highly susceptible to pulse beetle and blackgram genotypes were least susceptible. The susceptibility of lentil and mungbean were observed intermediate. Maximum (24.4%) of seed damage was observed on chickpea and the minimum (6.9%) was recorded in blackgram. Except blackgram, all the tested genotypes of chickpea, lentil and mungbean differed significantly for their susceptibility to the pulse beetle. The genotypes ML-22 of lentil, MC-21 of mungbean, Hyprosola of chickpea and MAK-1-79 of blackgram were marked least susceptible in comparison with the tested genotypes of respective pulse species. Seed surface smoothness, seed coat thickness and chemical stimuli influenced on the oviposition and damage of pulses by the pulse beetle.

An experiment was conducted at BINA (Bangladesh Institute of Nuclear Agriculture) substation, Satkhira on slightly calcareous silty clay soil during the boro season of 2009-2010 to investigate the effects of different combinations of inorganic fertilizers in order to achieve sustainable high yield goal in the STL-655 rice mutant cultivar. The six treatment combinations were: T 1 (absolute control), T 2 (N 60 P 20 K 40 S 10 Zn 1 ), T 3 (N 80 P 25 K 50 S 15 Zn 1.5 ), T 4 (N 100 P 30 K 60 S 20 Zn 2 ), T 5 (N 120 P 35 K 70 S 25 Zn 3 ) and T 6 (N 140 P 40 K 80 S 30 Zn 4 ) that was laid out in a randomized complete block design (RCBD) with three replications having per plot size was 5m x 4m. The results revealed that grain and straw yields of STL-655 rice mutant responded significantly with the different treatment combinations. The highest grain (3.95 t/ha) and straw yield (7.38 t/ha) was obtained in T 6 (Soil test basis high yield goal) treatment, which was significantly higher than all other treatments. The treatment T 6 (N 140 P 40 K 80 S 30 Zn 4 ) caused an increase of 60% grain yield and 27% higher straw yield over the control. Nutrient uptake of N, P, K and S by grain of boro rice (STL-655 rice mutant) varied from 25.14 to 48.02, 5.40 to 8.14, 11.76 to 23.02 and 4.15 to 7.09 kg/ha, respectively. The N, P, K and S uptake by straw of boro rice (STL-655 rice mutant) varied from 20.36 to 35.85, 5.47 to 11.05, 59.01 to 159.6 and 9.54 to 12.97 kg/ha, respectively.

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Potent (0.1%) and BAU-Biofungicide (2%) revealed the significant reduction both in disease severity and incidence of narrow brown leaf spot disease, and the lowest disease severity and incidence of bacterial leaf blight disease were 3.00% and 5.83%, respectively in BRRI dhan29 in 2012 year. BAU-Biofungicide (Trichoderma based preparation), extract of garlic (Allium sativum) and neem (Azadirachta indica), Bavistin DF (Carbandazim) and Potent 250 EC (Propiconazole) were evaluated in controlling narrow brown leaf spot and bacterial leaf blight disease (Xanthomonas oryzae pv. Oryzae) under field condition for producing seed quality and controlling seed borne pathogen of rice cv BRRI dhan29 during 2012 and 2013 years. Maximum normal seedling (87.67%) and 37.49% higher increase in vigour index on seed quality test of harvested seeds were observed with BAU-Biofungicide (3%) over control. BAU-Biofungicide (2 and 3%) and Potent 250 EC (0.1%) were found to be effective in controlling seed borne pathogens. BAU-Biofungicide has also been attributed as profound contribution on quality seed production of harvested seed of BAU-Biofungicide sprayed plot.