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The population of whitefly on cotton leaves was investigated under field and laboratory conditions (kept unsprayed) at Shah Abdul Latif University, Khairpur during, 2017. The data were collected from randomly selected twenty plants per week for the whitefly pest population and its parasitoid emergence that appeared from seedling to crop harvesting. The whitefly population was counted from various portions of the plant (upper, mid and lower) under field conditions. The highest population of whitefly was found on the leaves of the middle part of the plant 4.45 ± 0.53 in September, and a minimum population of whitefly was found on the leaves of the bottom portion of a plant; 0.53 ± 0.54 in July. The overall mean population of whiteflies per week was compared among four months of data collection. Among these months the maximum per week whitefly population was observed in September 4.38 ± 0.05, and the minimum per week whitefly population was found in July 0.72 ± 0.14. In laboratory conditions the maximum population percent of the parasite, Eretmocerus eremicus was calculated in August 21.43 ± 0.89% and minimum parasite % was recorded in July 19.37 ± 0.89%. It is concluded that the whitefly population and the parasitoid, Eretmocerus eremicus population, fluctuated throughout the observation period. It is suggested that if promoted Eretmocerus eremicus may control the whitefly of the cotton crop at the upper region of Sindh province.
Hakim Ali Sahito, Fozia Soomro, Tasneem Kousar, Zafar Hussain Shah, Wali Muhammad Mangrio, Faheem Ahmed Jatoi. (2020) INFLUENCE OF PARASITOID, ERETMOCERUS EREMICUS (HYMENOPTERA: APHELINIDAE) ON COTTON WHITEFLY, BEMISIA TABACI (HEMIPTERA: ALEYRODIDAE) UNDER VIVO AND VITRO CONDITIONS AT UPPER SINDHv, , Volume 17, Issue 1.
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