Varietal Preferences of Leafminer, Tuta absoluta on Tomatoes in Field
Varietal Preferences of Leafminer, Tuta absoluta on Tomatoes in Field
Abdul Hayee Gabol1, Arfan Ahmed Gilal1*, Lubna Bashir Rajput1, Jamal-U-Ddin Hajano2, Muhammad Ishaque Mastoi3, Ghulam Qader Mangrio1 and Jam Ghulam Mustafa Sahito4
ABSTRACT
Tomato leafminer, Tuta absoluta has emerged as a serious oligophagous pest of tomatoes and other allied vegetables. It has recently been reported from Sindh, Pakistan, where studies on its biology and management are lacking. Therefore, studies were conducted to determine the relative resistance of widely grown hybrid (Rota F1, Early King, G1612, NAGA F1 and T-1057) and local tomato varieties (Desi Local and Shimlo) of Sindh, Pakistan against T. absoluta. All the varieties grown with standard agronomic practices as data on infestation of T. absoluta was taken weekly since the fifteen days of tomato transplanting depending on its characteristic damage symptoms. Both local tomato varieties were found significantly more susceptible than hybrid varieties that also differ in their relative resistance against T. absoluta. Overall, significantly the highest T. absoluta infestation on tomato leaves and fruits was recorded on Desi local (27.19±9.10 and 9.10±0.44%) and Shimlo (26.47±8.76 and 8.76±0.43%) varieties, whereas T1057 (9.70±3.54 and 3.54±0.19%) suffered the lowest infestation. Among hybrid varieties, the highest T. absoluta infestation on leaves and fruits was recorded on Rota F1 (21.22±7.07 and 7.07±0.33%) variety. A significant effect of T. absoluta infestation was also recorded on tomato yield of various varieties as the highest yield (735.20±9.49 maunds/acre) was recorded for T1057 variety, followed by Early King (676.40±8.21 maunds/acre). The lowest yield was observed in Desi Local (407.60±7.03 maunds/acre) and Shimlo (412.60±8.60 maunds/acre). Therefore, further studies should be planned to evaluate the mechanism of resistance among different tomato varieties against T. absoluta so that better breeding strategies could be employed to develop more resilient varieties with good yield potential.
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