Varietal screening of indigenous maize against Chilo partellus
Imtiaz Hussain Malana, M Waqar Hassan, Adnan Babar, Mirza Abdul Qayyum, Muhammad Ishtiaq, Zunaira Azmat, Muhammad Asad Saleem
Maize stem borer (Chilo partellus) (Swinhoe) (Lepidoptera: Pyralidae) is a common pest of maize. It causes serious damage to the maize crop. It also causes solemn damage on different parts of the plant. Different local varieties of maize were screened to check the early infestation by maize stem borer. Seven maize varieties viz., C2P-132001, FH-948, MMRI-yellow, Pearl, Sadaf, Sahiwal-2002 and YH - 1899 were obtained from Maize and Millets Research Institute, Yousafwala, Sahiwal to check the relative resistance against maize stem borer. Research was done on experimental field area of University College of Agriculture and Environmental Sciences, the Islamia University of Bahawalpur following Randomized Complete Block Design with three replications. The total area selected for research was 35 x 70 ft2. Maize was planted with row to row and plant to plant distance maintained as 75 cm and 23 cm respectively. After a few weeks of planting maize in the field, data regarding dead hearts, leaf holes, larval population and larval excreta was recorded on weekly basis. Results on these varieties for early infestation for these parameters revealed that variety C2P-13-2001 showed minimum dead hearts and was proved resistant while variety YH-1899 showed maximum dead hearts by borers. In case of damage in terms of leaf holes the variety YH - 1899 proved resistant compared to the Sadaf variety. FH-948 was more resistant than MMRI- yellow for the larval excreta. Larval population was more on YH-1899 and less on C2P-13 2001. Seasonal infestation results showed dead hearts were present more on date 25-05-2017 and less on 27-04-2017 and the larval excreta was found more on 27-04-2017 and less on 11-04-2017. These data are important for further screening of these varieties for management of maize stem borer.