author(s)
Muhammad Siddique Khanzada, Tajwar Sultana Syed, Shagufta Rani Khanzada, Ghulam Husssain Abro, Muhammad Salman, Sajjad Anwar, Muhammad Sarwar, Adeel Aslam Perzada, Su Wang, Azmat Hussain Abro

abstract
Present studies were carried out on occurrence and abundance of thrips Thrips tabaci, whitefly Bemisia tabaci and their predator, Geocoris spp., on sunflower, Helianthus annuus L., at vegetable fields of Tandojam and Sultanaabad in Sindh. Population of thrips, whitefly and Geocoris spp., were recorded from January 15, 2010 upto April 16, 2011. Results showed that at Tandojam, maximum thrip’s population was observed at the end of March till mid of April, whitefly’s population was found to be low in 2^nd week of January and maximum in 2^nd week of April and predator, Geocoris was found low initially while higher till the end of observation period. In Sultanabad, thrip’s population was minimum in 1^st week of January, and the highest recorded in 3^rd week of April. Whitefly was recorded minimum in 1^st week of January and the highest in 3^rd week of April, while predator, Geocoris was initially found very low during 1^st week of January, but increased in 2^nd and 3^rd week of April. The temperature and humidity varied during different dates and significantly affected the abundance of insect population.