~ 470 ~ Journal of Entomology and Zoology Studies 2015; 3(5): 470-472 E-ISSN: 2320-7078 P-ISSN: 2349-6800 JEZS 2015; 3(5): 470-472 © 2015 JEZS Received: 17-07-2015 Accepted: 20-08-2015 Irfan Ullah Khan Cereal Crops Research Institute, Pirsabak-Nowshera, Khyber Pakhtunkhwa, Pakistan. Muhammad Nawaz Cereal Crops Research Institute, Pirsabak-Nowshera, Khyber Pakhtunkhwa, Pakistan. Fazal Said The University of Agriculture- Peshawar, Khyber Pakhtunkhwa, Pakistan. Kamran Sohail The University of Agriculture- Peshawar, Khyber Pakhtunkhwa, Pakistan. Subhanullah Cereal Crops Research Institute, Pirsabak-Nowshera, Khyber Pakhtunkhwa, Pakistan. Correspondence Fazal Said The University of Agriculture- Peshawar, Khyber Pakhtunkhwa, Pakistan. Integrated pest management of maize stem borer, Chilo partellus (Swinhoe) in maize crop and its impact on yield Irfan Ullah Khan, Muhammad Nawaz, Fazal Said, Kamran Sohail, Subhanullah Abstract Two years studies on integrated pest management of maize stem borer, Chilo parttellus in maize and its impact on yield were conducted during the crop seasons 2008 and 2009 at the Cereal Crops Research Institute, Pirsabak, Nowshera. In these trials, different control methods viz. cultural, mechanical, biological and chemical alone and in combination of all as IPM (Integrated Pest Management) as compared to control conditions were applied for the control of maize stem borer. The results showed that all the control methods were found significantly effective in reducing maize stem borer infestation in maize crop. Maize stem borer infestation was significantly lower in IPM treatment with 2.32% and 2.77% followed by chemical 3.68% and 3.47% as compared to control 12.92% and 7.70% during 2008 and 2009, respectively. The highest grain yield was obtained from plots treated with IPM 8.64 ton/ha and 5.81 ton/ha as compared to control 6.23 ton/ha and 3.63 ton/ha during 2008 and 2009 respectively. It is concluded that IPM is one of the best method for control of maize stem borer and obtaining the highest yield. Keywords: Maize, IPM, stem Borer, Chilo partellus, yield. 1. Introduction Maize (Zea mays L.) is the third major cereal crop grown throughout the world. It is extensively grown in temperate, subtropical and tropical regions of the world [9] . Maize is grown on 43% cropped area in Pakistan and 37% in Khyber Pakhtunkhwa. The total area under maize cultivation in Khyber Pakhtunkhwa during 2009 was 509.0 thousand hectares with total production of 903.9 thousand tones with an average yield of 1776 kgha -1 [6] . Maize plays an important role in the economy and food security of many countries. It is second most important kharif crop in Pakistan, grown mainly in the Punjab and Khyber Pakhtunkhwa provinces [5] . In Khyber Pakhtunkhwa maize crop is grown in Peshawar, Mardan, Charsadda, Swabi, Malakand, Haripur, D.I. Khan, Bannu and Kohat districts [8] . Maize is utilized as human food (25%) as well as in different industries (29%). Its higher protein content results in improvement of animal and human health [4] . Among the many limiting factors, insect pests, e.g., maize stem borers, aphids, grasshopper, flea beetle and shoot fly have significant role in losses of maize yield in Pakistan [2] . Maize stem borer Chilo partellus is the most destructive pest of maize and responsible for low yield of maize crop [7] . Pesticides have been frequently used to control insect pests of maize. However, these pesticides may also kill their natural enemies. Thus, population of insect pests increase and 43.3% yield loss occur due to killing of natural enemies [3] . IPM is good alternative to control insect pests of maize as they have little side effect on their natural enemies of insect pests [1] . Keeping in view, the importance of maize crop in the economy of Khyber Pakhtunkhwa and the economic losses caused by the maize stem borer, the present study was conducted with the aim to develop and standardize IPM Technology for the control of maize stem borer in maize crop to minimize misuse of hazardous pesticides and to reduce killing of different natural enemies and its impact on yield. 2. Materials and Methods Two years field experiments were conducted to evaluate different control methods for the control of maize stem borer in maize and their impact on yield of the crop at the Cereal Crop Research Institute, Pirsabak Nowshera during the crop seasons 2008 and 2009. Azam, a variety of maize was sown in 1 st week of July. The experiments were conducted in