Multi-Plant Screening and Controlled Evaluation of Two Selected Plant Species Against Tuta absoluta (Meyrick)

Abstract

Simple Summary Tuta absoluta (Meyrick) is one of the most destructive insect pests which infests solanaceous plants, posing a substantial threat to tomatoes (Solanum lycopersicum) through the devastation of their yields. The larvae of T. absoluta attack during all the life stages of tomato plants, leading to leaf discoloration and holes in fruits. Currently, most farmers manage T. absoluta using tank-mixed synthetic insecticides, which subsequently pose risks to the environment and biodiversity. Integrated pest management approaches using biological, cultural, physical and low-toxicity chemical methods have been recently promoted. However, companion plants used in the management of T. absoluta are scarce and documentation is limited. Therefore, this study screened fourteen potential companion plants in the lab followed by trial confirmation in insect-proof mesh cages and a pest exclusion screenhouse. The results indicated that Allium schoenoprasum and Aeollanthus fruticosus successfully managed T. absoluta by repelling it, leading to low oviposition and leaf damage, both in cage and screenhouse experiments. These results indicate the potential of A. schoenoprasum and A. fruticosus for the integrated, ecological management of T. absoluta. However, an empirical investigation under an open-field environment in diverse agroecological zones is warranted. Likewise, further studies are essential to check their compatibility with natural enemies and entomopathogens.