Bioefficacy of cow urine and different types of bio-pesticide against major sucking insect pests of cowpea

Abstract

An experiment was conducted to evaluate various doses of cow urine, i.e. 25, 50, 75 and 100 per cent in combination with neem oil 1% and neem seed kernel extract (NSKE) 5% for its field bio-efficacy against insect pests of cowpea during 2018-19. The experiment was conducted at National Dairy Development Board (NDDB) farm at Itola Village, Gujarat. Among the evaluated different doses and combinations of cow urine and biopesticides, cow urine 100% + neem oil 1% was found highly effective against whitefly, jassid and thrips. However, cow urine 100% + NSKE 5%, cow urine 100%, cow urine 50% + neem oil 1%, cow urine 50% + NSKE 5% and cow urine 75% were also found equally effective in reducing insect pests population during present investigation. The cowpea seed yield was recorded higher from plots treated with cow urine 100% + neem oil 1% followed by cow urine 100% + NSKE 5%, cow urine 100%, cow urine 50% + neem oil 1%, cow urine 50% + NSKE 5% and cow urine 75% than other treatments. The lowest (530 kg/ha) yield of cowpea was recorded in plots treated with cow urine 25%.The treatment of cow urine 100% + neem oil 1% showed highest net gain over control and realization but, looking to the ICBR (Incremental Cost Benefit Ratio), the highest (1: 2.10) return was obtained from the treatment of cow urine 50% + NSKE 5% and the lowest (1: 0.49) from the treatment of Bacillus thuringiensis 0.2%.