author(s)
Divya S and VE Nethaji Mariappan

abstract
Studies on the efficacy on IPM technology against the important insect pests of maize were carried out at the farmers field of Perambalur district of Tamil Nadu during the Kharif seasons of 2017-18. The efficacy of Integrated Pest Management technologies against the white grub Holotrichia serrata (Coleoptera: Scarabaeidae) and stem borer in the maize (Chilo partellus) fields was evaluated. The findings revealed that the per cent white grub infestation after two months was recorded as 35.5 percent in the farmers practices and minimum infestation of 0.3 percent was noticed in IPM fields. Minimum stem borer infestation of 4 percent was recorded in IPM fields and maximum infestation was recorded 15.4 percent in farmers practices. The maize yields harvested from the plots treated with IPM technologies were at least 35.33 % higher than that from farmers practices. The cost-benefit of using IPM technologies for white grub and stem borer control was estimated to be 2.08 whereas it was 1.27 in farmers practices of using only chemicals. IPM technologies showed promise for white grub and stem borer control in maize fields. It is concluded that IPM is the most effective control methods against white grub and stem borer and obtaining the highest maize yield of 54.34 q/ha whereas 33.00 q/ha in farmers practices.