Jute is a principal fibre crop in the world. It is the most important cash crop and the biggest foreign exchange earner of Bangladesh. It ranks second to the cotton among all the natural fibre production (Talukder et al., 1989). Jute is attacked by various insect and mite pests. More than 40 species of insects and mites are considered to be the pests of jute in Bangladesh (Kabir, 1975). All parts of the plants are subject to attack. Among the jute pests Spilarctia obliqua commonly known as jute hairy caterpillar, is the worst one (Kabir and Khan, 1968; Sharif, 1962). The Bihar hairy caterpillar, Spilarctia obliqua (Walker)(Arctiidae: Lepidoptera), is a widely distributed, serious polyphagous pest (Gupta and Bhattacharya, 2008). The pests cause loss in yield and quality of fibres (Rahman and Khan, 2010). Spilosoma obliqua (walker) belongs to the family Arctiidae of Lepidoptera order is a polyphagous insect causing serious damage to a variety of crops (Bhattacharya et al., 1995). Different insects and mite pest attack jute during the growing season. Jute hairy caterpillar, Spilarctia obliqua (walker) under the family Arctiidae of lepidoptera order is one of these destructive insect pests of jute that can reduce up to 18.5% fibre yield depending on their intensity of infestation. There are many synthetic insecticides available in the local market to control jute hairy caterpillar but all are not available in all over the country and all are not equally effective. Moreover, indiscriminate and repeated use of same chemical might lead to develop resistance in target pest. Therefore, new chemical pesticides were needed to include in the recommendation list, which will help to overcome the resistance problem of pest against insecticides. When more insecticides will be available in the market, farmers will have a chance to choose insecticides according to the availability and affordability.

There are many manmade insecticides existing in the local market to control jute hairy caterpillar but all are not available through the country and all are not likewise effective. Moreover, haphazard and recurrent use of same chemical might lead to development of resistance in target pest. Therefore, more number of chemical pesticides should be encompassed in the reference lists, which will help to overcome the resistance problem of pest against insecticides. Furthermore, farmers will have a chance to choose insecticides according to accessibility and cost. So, an experiment was taken following two objectives (i). to estimate the efficacy of some