Efficacy of some insecticides and correlation between the dose of application and the number of live larvae of Tuta absoluta (Meyrick) in tomato cultivated in protected area

The analyses were performed during 2015 and 2016 to determine the efficacy of two insecticides in the controlling of Tuta absoluta (Meyrick) and the correlation between the application dose and the number of live larvae at tomato plants in protected area. The analysed insecticides with their respective concentrations in 100L water were Spinosad (Laser): 40ml/100L, 50ml/100L and 60ml/100L water, and Indoxacarb (Avaunt): 25ml/100L, 35ml/100L, 50ml/100L. The experiment was set at two locations (Kuklish - Strumica and Josifovo - Gevgelija) following the method of randomized block system, in four repetitions of the treatments. The inspection of the plants was carried out on three or seven days. In the control of T. absoluta larvae all treatments have proven to be effective. Nevertheless, taking into account the complexity of the pest, in both years of the study, and in both localities, the most effective proved to be indoxacarb, at a dose of 50 ml/100L, with an efficiency of over 90%. These findings suggest the possibility of using spinosad or indoxacarb as chemical agents for the control of T. absoluta, alone or in combination with other measures in the integrated protection of tomatoes from T. absoluta in protected area