International Journal of Environment and Climate Change

Wheat is widely used as a staple food in the world including India. But storage conditions of wheat grains are infected by several coleopteran pests. Tribolium castaneum Herbst is a ubiquitous and pestiferous pest among all. Adult and larvae both are harmful to wheat storage which often demolishes stored grains. The present study attempted at Entomology laboratory, Assam Agricultural University-Jorhat, to manage Dry powders of A. indica, C. roseus, C. heptaphylla, D. stramonium, E. tereticornis, M. struthiopteris, and V. negundo were used against T. castaneum to get rid of problematic local medicinal plants. During probit analysis the highest LD₅₀ value was found in A. indica (1.49%) followed by D. stramonium (1.52%) and E. tereticornis (2.02%) and the lowest LD₅₀ in Matteuccia struthiopteris (11.72%). In the repellency test, the highest rate of repellency was observed in A. indica (82.21%) followed by D. stramonium (72.59%), E. tereticornis (70.36%), and the lowest in Matteuccia struthiopteris (32.58%). Based on LD₅₀ and mean repellency, the three botanicals (A. indica, D. stramonium, E. tereticornis) were selected for further work e.g., mortality and weight loss. A mortality study recorded 100% mortality after 35 days of treatment in the case of A. indica, D. stramonium, E. tereticornis. During the trial in 2018, A. indica (5.76%) had the lowest grain weight loss, followed by D. stramonium (12.05%) and E. tereticornis (12.05). The highest grain weight loss was observed in control with 62.33 per cent. Give your one line conclusion on these research.