Abstract
Investigations on impact of weather parameters on population dynamics of tobacco leaf eating caterpillar, Spodoptera litura (F.) infesting groundnut was carried out at regional research station, Anand Agricultural University, Anand during kharif 2021. Infestation of the S. litura on groundnut was observed from July to October. The infestation of S. litura started from third week of July (29th SMW) during kharif 2021. Thereafter, population and per cent damaged plants were gradually decreased toward the maturity of the crop up to last week of October (44th SMW). The maximum larval population of S. litura as well as per cent damaged plants were observed during the month of September (35th SMW to 39th SMW). S. litura larvae showed significantly positive correlation with rainfall, morning and evening relative humidity as well as morning and evening vapor pressure. Morning relative humidity contributed 44.5% variation in the larval population of S. litura.
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