Selectivity of Metarhizium anisopliae and Beauveria bassiana to adults of Telenomus podisi (Hymenoptera: Scelionidae) ; Seletividade de Metarhizium anisopliae e Beauveria bassiana para adultos de Telenomus podisi (Hymenoptera: Scelionidae)

The selectivity of entomopathogenic fungi to non-target organisms needs to be considered in Integrated Pest Management (IPM), because even though they are biological control agents, if used incorrectly, they can negatively alter the functioning of agroecosystems. Therefore, studies that assess the selectivity of these fungi to beneficial organisms are extremely important. The objective of this work was to evaluate the selectivity of Metarhizium anisopliae (Metarril®) and Beauveria bassiana (Boveril®) to adults of Telenomus podisi Ashmead (Hymenoptera: Scelionidae), under laboratory conditions. The products were evaluated on adult females of T. podisi, at the concentrations recommended by the manufacturer. To this end, 0.2 mL of suspensions of each product and control (treatments) were applied to the inner surface of glass tubes, and then a female T. podisi was placed in it (bigger, smaller 48 h of emergence). After 24 h of contact, cards with 25 eggs of Euschistus heros Fabricius (Hemiptera: Pentatomidae) were offered for 24 h (COF24). After this period, the COF24 were withdrawn. After 72 h of contact of the female with the tube surface, new E. heros egg cards were made available (COF72) for 24 h for T. podisi ovipositioning. The evaluations were carried out on a daily basis and the parameters evaluated were female longevity, percentage of parasitism, percentage of emergence, sex ratio, and egg-adult period. Mortality of T. podisi females was evaluated daily to determine longevity, percentage of parasitism and emergence, sex ratio, and egg-adult period. Metarril® and Boveril®, considered selective for adult females of T. podisi, did not negatively affect most of the parameters evaluated. ; A seletividade de fungos entomopatogênicos a organismos não-alvo deve ser considerada no Manejo Integrado de Pragas (MIP), pois mesmo sendo agentes de controle biológico, se utilizados de forma incorreta, podem alterar negativamente o funcionamento dos agroecossistemas. Portanto, estudos que avaliam a seletividade desses ...