author(s)
Md Imraj Zaman

abstract
Repeated and indiscriminate use of chemical pesticides over a long time leads to human health hazards, development of resistance in insect pests, toxicity to non-target organism & ecological disruption. A sustainable eco-friendly experiment was conducted on brinjal accompanying with different trap crops to observe their impact and efficacy on the management of hadda beetle (Henosepilachna Sp) population during the seasons of summer & winter, 2018-19 in Central Research farm, Gayeshpur, Nadia, West Bengal. The experiment consisted of 6 different treatments with brinjal as the main crop and sweet potato (T₁), marigold (T₂), cowpea (T₃), maize (T₄) & brinjal itself (T₅) {1.5 times of recommended fertilizer dose} as trap crop in the periphery of the plots. During the whole cropping season, the hadda beetle (grub & adult) population was significantly lesser in all the trap cropped treatments (T₁-T₅) than the sole crop control (T₆). The average mean number of hadda beetle population (grub & adult) during the two cropping season (15SW to 34SW of 2018 and 39 SW of 2018 to 6 SW of 2019) were lowest in brinjal+ maize combination (T₅) respectively 1.77,0.51 and highest in the sole crop control (T₆) i.e 3.29,1.08.