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Maize (zea mays) is the most important cereal crop after rice in Bangladesh. During storage, maize grains are severely destroyed by insect pests. Most of the farmers of Bangladesh do not know how to preserve corn seed properly due to insufficient knowledge of storage pest of maize. An experiment was conducted to assess the major pests associated with stored maize, the damage and losses they cause in Bangladesh during July to December 2017. Sixty (60) farmer's farms from fifteen major maize growing districts of Bangladesh were assessed. Sixteen Arthropods, Fifteen Coleopterans, Five Lepidopterans and one Acarina were documented from the collected samples. Maize weevil (Sitophilus zeamais) followed by maize grain moth (Sitotroga cereallela), rice weevil (Sitophilus oryzae), flour beetle (Tribolium confusum) and Areca nut weevil (A. fasciculatus) were the major pests of stored maize in the study area. Among them, Maize weevil (S. zeamais) is the dominant, destructive and most important pest of maize in Bangladesh. This pest was found in abundance in all areas assessed damaging maize grain. Quantitative average grain damage of 75.85% and losses of 51 to 85% are common in the store within five to six months after storage. An integrated weevil management method should be implemented to prevent the high quantitative and qualitative grain losses incurred to contribute towards family food security in Bangladesh.

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The experiment was conducted at Shibganj upazila under Bogra district during October, 2014 to January, 2015 to observe the effect of planting dates on the yield of mustard seed. There were five planting dates viz. 25 October, 30 October, 05 November, 10 November and 15 November. Significant variations due to different planting dates were observed in plant height, number of leaves plant-1, number of siliqua plant-1, number of seed siliqua-1, 1000 weight plot-1, yield plot-1and yield ha-1of mustard. Results showed that the highest seed yield was1.50 t ha-1 obtained from 30 October. The lowest seed yield was 1.0 t ha-1 from 15 November. From the results, the best planting date of mustard is on 30 October in the northern parts of Bangladesh.  Int J Appl Sci Biotechnol, Vol 3(4): 651-654