Effects and economics of different treatments against the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) at harvesting time.
Nine field treatments against the tomato leaf miner, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) infesting tomato plants were carried out in Fayoum governorate, Egypt in 2012 and 2013 seasons. In 2012, the best results were obtained by using a combination of the egg parasitoid Trichogramma evanescens West. and the chemical insecticide Coragen 20%. This treatment gave the least % infestation in tomato fruits and the highest yield/feddan. The treatment of pheromone trap+Coragen ranked second, while the light trap+Coragen ranked third. In 2013, T. evanescens+the bio-insecticide Emamectin gave the best results, followed by the Trichogramma+Coragen and then the pheromone trap+Coragen. Economically, regarding the costs of application and obtained yield of tomato crop, Trichogramma+Coragen ranked first, followed by Trichogramma+Emamectin.