Insecticide resistance in Argentine populations of Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)
TLDR
The aim of this work was to study the toxicity of three insecticides widely used in chemical control of T. absoluta on larvae from a laboratory susceptible population (CASTELAR) and two greenhouse populations (ROSARIO and BELLA VISTA).Abstract:
The tomato leafminer, Tuta absoluta (Meyrick), is one of the key pests of tomato in Argentina. Since its dispersal in the 1970s, chemical control has been the main method of controlling it. However, reduced efficacy of some of the recommended insecticides has been observed since the 1980s. The aim of this work was to study the toxicity of three insecticides widely used in chemical control of T. absoluta (abamectin, deltamethrin and methamidophos) on larvae from a laboratory susceptible population (CASTELAR) and two greenhouse populations (ROSARIO and BELLA VISTA). Insecticides were dissolved in acetone and topically applied to the mid-dorsal abdominal region of two-day old 4th instar larvae. LD50 values were estimated and the Resistance Ratio (RR) for each insecticide was calculated (RR = LD50 value of each greenhouse population/LD50 value of the susceptible population). ROSARIO and BELLA VISTA populations showed the following RRs values: > 68.38 for deltamethrin; 2.48 and 3.49 for abamectin, respectively; and 0.79 and 0.86 for metamidophos, respectively. Deltamethrin resistance observed in ROSARIO could be due to the high selective pressure exerted by pyrethroids in this location. Deltamethrin resistance in BELLA VISTA is more difficult to explain, because pyrethroids were scarcely used in the greenhouse where the insects were sampled. The incipient abamectin resistance detected in the BELLA VISTA population could result from the frequent use of this insecticide in this location, although natural variation can not be discarded.read more
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Biological invasion of European tomato crops by Tuta absoluta: ecology, geographic expansion and prospects for biological control
Nicolas Desneux,Eric Wajnberg,Kris A.G. Wyckhuys,Giovanni Burgio,Salvatore Arpaia,Consuelo A. Narváez-Vasquez,Joel González-Cabrera,Diana Catalán Ruescas,Elisabeth Tabone,Jacques Frandon,Jeannine Pizzol,Christine Poncet,Tomás Cabello,Alberto Urbaneja +13 more
TL;DR: A review of information on the invasion by T. absoluta, its ecology, and potential management strategies, including data that may help the implementation of efficient biological control programs, indicates an urgent need for efficient and sustainable management methods.
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Control failure likelihood and spatial dependence of insecticide resistance in the tomato pinworm, Tuta absoluta
Gerson Adriano Silva,Marcelo Coutinho Picanço,Leandro Bacci,Andre L. B. Crespo,Jander Fagundes Rosado,Raul Narciso C. Guedes +5 more
TL;DR: Insecticide resistance in field populations of the tomato pinworm prevails for the insecticides nowadays most frequently used against them-the chitin synthesis inhibitors (diflubenzuron, triflumuron and teflubenzur).
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Prospects for the biological control of Tuta absoluta in tomatoes of the Mediterranean basin
TL;DR: In this paper, a review of available information on indigenous natural enemies is updated, and the current pest management approaches used against T. absoluta are addressed, and future scenarios for biological control of this pest are discussed.
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Effect of two solanaceous plants on developmental and population parameters of the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)
TL;DR: Results showed that tomato was a more suitable host-plant and had a better nutritional quality than potato, when T. absoluta fed on potato the potential population increase requires attention and the pest could become a pest for the potato crop.
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First report of Tuta absoluta resistance to diamide insecticides
Emmanouil Roditakis,Emmanouil Vasakis,Maria Grispou,Marianna Stavrakaki,Ralf Nauen,Magali Gravouil,Andrea Bassi +6 more
TL;DR: Cases of resistance development to diamide insecticides in T. absoluta are reported for the first time and underline the importance of committing to the resistance management strategies for diamide Insecticides.