Abstract
Introduction. Tuta absoluta is one of the most harmful insect pests of tomato crops worldwide. While its host plants mainly include Solanaceae species, recent studies suggest that it can lay eggs and develop on a wider range of wild and cultivated plants. No complete list of host plants based on available scientific data exists. Such information is important for those who aim at performing integrated management strategies against this pest, especially when it comes to identify host reservoirs where the species can survive between harvests or avoid insecticide exposure. Literature. We identified cultivated and non-cultivated plant species belonging to Solanaceae, Amaranthaceae, Euphorbiaceae, Cucurbitaceae, Geraniaceae, Fabaceae, Asteraceae and Malvaceae that allow partial or complete egg-imago development. Among them, we found out that most non-Solanaceous plants serve as oviposition sites only (with no larval development possible), and a few of them allow partial life cycle (causing late instars to die prematurely). We also identified a strong cultivar-dependence in the most common cultivated plant species including tomato and potato. Conclusions. We discuss the potential of resistant and genetically modified tomato cultivars, plant chemical compounds and fertilization as components of integrated control strategies of T. absoluta.
Highlights
Tuta absoluta is one of the most harmful insect pests of tomato crops worldwide
With the increasing attention this pest has been receiving in the last decade, additional host plants were identified, including the common bean (Phaseolus vulgaris L.) and the European bindweed (Convolvulus arvensis L.) (Portakaldali et al, 2013; Bawin et al, 2016; Ingegno et al, 2017a; Ingegno et al, 2017b; EPPO, 2019)
In other wind tunnel assays, T. absoluta females preferred flying toward tomato plants rather than potato plants (Caparros Megido et al, 2014), but no preference was highlighted between S. nigrum and S. tuberosum (Bawin et al, 2015)
Summary
Tuta absoluta is one of the most harmful insect pests of tomato crops worldwide. While its host plants mainly include Solanaceae species, recent studies suggest that it can lay eggs and develop on a wider range of wild and cultivated plants. No complete list of host plants based on available scientific data exists. Such information is important for those who aim at performing integrated management strategies against this pest, especially when it comes to identify host reservoirs where the species can survive between harvests or avoid insecticide exposure. Une revue des plantes hôtes de Tuta absoluta (Lepidoptera: Gelechiidae) et leur impact sur les stratégies de gestion Introduction. Bien que ses plantes hôtes incluent principalement des espèces de Solanacées, des études récentes suggèrent que cet insecte peut pondre et se développer sur une large gamme de plantes sauvages et cultivées. La plupart des plantes non-Solanacées servent seulement comme un site d’oviposition (sans développement larvaire possible) et quelques-unes permettent un cycle de vie partiel (mortalité prématurée des derniers stades larvaires). Gamme des plantes hôtes, gestion intégrée des ravageurs
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