MANAGEMENT OF TOMATO LEAF CURL VIRUS AND ITS BEMISIA TABACI VECTOR IN RELATION TO PREVAILING ENVIRONMENTAL CONDITIONS OF FAISALABAD

Saima Naseer, Imran Nadeem, Azhar Mustafa, Javed A. Shah, Salman Ahmed, Muhammad Saqib, Tahira Abbas, Yasir Ali

Abstract


Tomato (Lycopersicon esculentum) production is severely affected by the tomato leaf curl virus (TLCV) and its vector populations under favourable environmental conditions. This disease and its vector Bemisia tabaci are effectively controlled by the plant extracts and many chemicals. Therefore, current study was designed in the Research Area of Plant Pathology Research Institute, Ayub Agriculture Research Institute (AARI) Faisalabad following Randomized Complete Block Design (RCBD) during crop seasons 2018-2019. The data for disease incidence were recorded based on disease rating scale proposed by Khalid (2013) and subjected to analysis of variance at a 5% level of significance. Correlation and regression analysis were performed, to determine the relationship between environmental factors and disease incidence. Only two varieties i.e. Naqeeb and Morgal indicated a resistant response against disease development. All epidemiological variables showed a positive association with the disease incidence and Bemisia tabaci populations except relative humidity. Maximum disease incidence and whitefly population were observed at the highest temperature (34-41ºC), the lowest temperature (22-24ºC), rainfall (1.4-4.5 mm) and wind speed (3.1-5.8 km/h) whereas, this populations decreased by increasing relative humidity from 15-25%. Among chemicals and plant extracts, acetamiprid and neem proved to be the most effective for the management of disease incidence and whitefly populations, respectively.

Keywords


Disease incidence, meteorological variables, chemicals, tomato.

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DOI: https://doi.org/10.33866/phytopathol.033.02.0696

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Pakistan Journal of Phytopathology
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