%A Ahmed, Sher %A Ahmed, Sarfraz %A Khetran, Munir Ahmad %A Shahzad Ahmed Shahwani, Safeer Ahmed, %A Amin, Mohammad %A Jakhro, Muhammad Iqbal %D 2018 %T 29. To study the effect of natural enemy Trichogramma chilonis (Ishii) against spotted bollworm (Earias Vittella F.) on okra %K %X The present study was conducted at the Pussia Goth near Tandojam during the year 2016, to study the effect of natural enemy Trichogramma chilonis (Ishii . ) against spotted bollworm (Earias Vittella Fabricius) on okra. Observations on spotted bollworm population were recorded at once per week. Pre-treatment observation was recorded one day before release and post-treatment observation was recorded three and five days after release. The reduction percentage was also calculated. The maximum population of spotted bollworm recorded in 6 th week was (17.66±1.72) and minimum population in 10 th week was (14.33±0.29) in control plot during 1 st to 10 th weeks duration, respectively. The natural enemies were released at the interval of 10 days. However, the population in treated plot after 3 days of ( T. chilonis ) releases the maximum population of spotted bollworm was recorded in 2 nd week (8.89±1.24) and minimum population in 10 th week (6.19±0.29) during 1 st to 10 th week duration, respectively. Peak level of spotted bollworm was observed during 1 st and 2 nd weeks afterward the spotted bollworm population was declined in a linear sequence from 3 rd to 10 th weeks. Similarly, after 5 days ( T. chilonis ) releases, the maximum population of spotted bollworm was recorded in 1 st week (10.16±1.33) and minimum population in 10 th week (8.00±0.41) during 1 st to 10 th week duration, respectively. Peak level of spotted bollworm was observed during 1 st and 2 nd weeks afterward the spotted bollworm population was declined in a linear sequence from 3 rd to 10 th weeks. Moreover, the results showed that spotted bollworm populations were considerably declined in treated plots due to the presence of T. chilonis as compare to control plot. Keywords: Biological agent; Okra; Population; Spotted bollworm http://dx.doi.org/10.19045/bspab.2018.70081 %U https://thepab.org/index.php/journal/article/view/486 %J Pure and Applied Biology (PAB) %0 Journal Article %P 655-661%V 7 %N 2 %@ 2304-2478 %8 2018-05-20