Efeito de diferentes doses de espinetoram sobre Ceratitis capitata (Wiedemann, 1824)

Abstract

Ceratitis capitata is a pest of global economic importance, the main control strategy for this pest is the use of chemical or synthetic pesticides associated with other management strategies. However, the indiscriminate use of these pesticides can harm human health, contaminate the environment, and induce the emergence of resistant individuals and populations. Fresh fruit consumers and regulatory bodies have pressured producers to reduce the use of pesticides and for control techniques that have less impact on the environment and human health, such as reducing the doses of pesticides applied. Thus, the objective was to evaluate the efficacy of spinetoram in the control of C. capitata at different doses. The pesticide was tested in five doses on insects on the egg and pupae stages through contact, larvae and adult through contact and ingestion. The results showed significant difference only for egg viability and number of pupae after treatment of larvae by ingestion. Where egg viability was greater than 80% for all doses except for the dose of 96 g ha -1 . The number of pupae was reduced with pupation below 15% for all doses, except for the dose of 48 g ha -1 which was above 30%. For adult mortality, it was observed that all dosages were efficient in the control of C. capitata when treated with applications via contact, reaching a mortality of 90% (Lethal Dose 90% - LD90) at the recommended dose (120 g ha -1 ) and in the two doses below (96 and 72 g ha-1 ). For application by ingestion, only the recommended dose and the dose of 96 g ha -1 reached 50% mortality (Lethal Dose 50% - LD50). Espinetoram (spinosine) can be used at dosages below those recommended for the control of adult stage of C. Capitata 96 and 72 g ha-1 for the patch test and 96 g ha-1 for the ingestion test, when tested in the laboratory.