Host Plant and Egg Parasitization Interaction Study of Rice Yellow Stem Borer Scirpophaga incertulas Walker Baghel Mayank*, Sharma Sanjay, Chandrakar Gajendra, Baghel Samrath, Nirala Yaspal Singh Department of Entomology, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur-492012, Chhattisgarh, India *Email: gchandrakarigkv@gmail.com
Online published on 23 December, 2016. Abstract Field experiment was conducted at research farm of Indira Gandhi Krishi Vishwavidyalaya, Raipurduring kharif season 2011. Relative tolerance of six rice varieties (Chandrahasini, Pusa Basmati-1, Swarna, PTB-33, Shyamla and TN-1) grown simultaneously were assessed against rice stem borer. The extents of stem borer eggmass parasitization were also assessed in insecticide free paddy field of IGKV research farm during kharif 2011. The Telenomus sp. was found as inhabitant and dominant egg parasitoid of rice stem borer egg mass but its activity is density dependent. Maximum affected hills (69.83%) and tillers (63.73%) were found in Chandrahasini, whereas minimum affected hills (28.57%) and affected tillers (16.79%) were found in Swarna variety. Activity of egg parasitoid is seasonally allied; the egg mass size dependent and paddy growth stage specific. The egg parasitization by Telenomus sp. was found maximum in fourth week of October (17.65%). The variety which showed maximum egg parasitization by Telenomus sp. was Chandrahasini with 33.72% parasitization while TN-1 showed minimum egg parasitization (14.75%). Top Keywords Rice stem borer, Egg parasitization, Telenomus sp, Rice varieties. Top |