Articles
Evaluation of the effectiveness of some protection products against the Tuta absoluta pest in tomato crops from southern Romania
Article number
1391_51
Pages
373 – 380
Language
English
Abstract
Today, tomatoes are quite widespread in the world, being one of the most important vegetable crops.
Through the several thousands of cultivars and hybrids, tomatoes are grown on about 4.8 million ha.
Recently, however, tomatoes grown in protected areas have a limiting factor, an extremely dangerous pest (Tuta absoluta). Tuta absoluta is a microlepidoptera, extremely harmful, with a high reproductive potential (it can develop in certain climatic conditions up to 10-12 generations per year, and a female can lay up to 250 eggs during her lifetime). In the period 2020-2022, in protected spaces cultivated with tomatoes located in consecrated vegetable basins (Dăbuleni – Dolj, Cilieni – Olt, Strejești – Olt, Grădinari – Olt), we started monitoring the pest Tuta absoluta, by placing Delta-type pheromonal traps.
Observations obtained through monitoring allowed establishing the fact that the life cycle of the pest, the number of generations per year, etc., are directly influenced by the evolution of soil and air temperature.
In Cilieni, Olt County (43.91423N; 024.60164E; ±5 m), in parallel with the monitoring of the Tuta absoluta attack, 3 variants of prevention and control were tested: the chemical variant, the biological variant and the combined variant.
The highest number of attacked fruits per plant was recorded in the biologically treated version (2.1 attacked fruits plant-1), and the lowest number of attacked fruits in the chemically treated version (0.5 attacked fruits plant-1). Without taking additional agrophytotechnical measures, phytosanitary treatments, regardless of the variant used, failed to significantly stop the attack of the Tuta absoluta pest.
Through the several thousands of cultivars and hybrids, tomatoes are grown on about 4.8 million ha.
Recently, however, tomatoes grown in protected areas have a limiting factor, an extremely dangerous pest (Tuta absoluta). Tuta absoluta is a microlepidoptera, extremely harmful, with a high reproductive potential (it can develop in certain climatic conditions up to 10-12 generations per year, and a female can lay up to 250 eggs during her lifetime). In the period 2020-2022, in protected spaces cultivated with tomatoes located in consecrated vegetable basins (Dăbuleni – Dolj, Cilieni – Olt, Strejești – Olt, Grădinari – Olt), we started monitoring the pest Tuta absoluta, by placing Delta-type pheromonal traps.
Observations obtained through monitoring allowed establishing the fact that the life cycle of the pest, the number of generations per year, etc., are directly influenced by the evolution of soil and air temperature.
In Cilieni, Olt County (43.91423N; 024.60164E; ±5 m), in parallel with the monitoring of the Tuta absoluta attack, 3 variants of prevention and control were tested: the chemical variant, the biological variant and the combined variant.
The highest number of attacked fruits per plant was recorded in the biologically treated version (2.1 attacked fruits plant-1), and the lowest number of attacked fruits in the chemically treated version (0.5 attacked fruits plant-1). Without taking additional agrophytotechnical measures, phytosanitary treatments, regardless of the variant used, failed to significantly stop the attack of the Tuta absoluta pest.
Authors
Ş. Nanu, A.N. Paraschiv, M. Iamandei, L.M. Sfîrloagă, C. Bîrsoghe, M.D. Ilina, F. Frătuțu, M.F. Băjenaru
Keywords
Tuta absoluta, protected spaces, phytosanitary treatments, cultivar, pheromonal traps
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