Bioecología del parasitoide Oòfago como agente de control biológico de Oebalus insularis Stal, 1872 (Hem: Pentatomidae) en el cultivo de arroz Oryza sativa L.

Rice (O. sativa) is one of the most important crops worldwide; however, its production is affected by various pests, including O. insularis, which feeds on developing grains, reducing yield and quality. The present study aimed to analyze the bioecology of the oophagous parasitoid as a biological control agent of O. insularis in O. sativa rice crops in the Babahoyo canton of Los Ríos. For this research, at least 20 female parasitoids were used, separated into feeding and non-feeding groups. In this context, the Telenomus parasitoid was identified as a biological control agent. The feeding Telenomus sp. parasitoids had a mean pre-oviposition time of 1.45 ± 0.85 days, and the non-feeding ones had a mean pre-oviposition time of 1.41 ± 0.5 days. The mean oviposition for parasitoids with feeding was 1.59 ± 0.94 days of oviposition and without feeding it registered an average of 1.00 ± 0.00 days of oviposition. The longevity of Telenomus sp. parasitoids with feeding obtained an average longevity of 5.15 ± 3.15 days of longevity and without feeding an average of 2.18 ± 1.38 days of longevity, there being a difference between the parasitoids with feeding. It is concluded that it is very likely that the nectar secreted by the flowers lengthens the life of the oophagous Telenomus sp. parasitoids. The food that was provided to the parasitoids, such as honey provides sugars such as sucrose, glucose and fructose may contribute to the longevity of Telenomus sp. parasitoids. The incubation of oophagous parasitoids with food provided resulted in a mean incubation time of 12.67 ± 2.47 days, and without food, a mean incubation time of 12.02 ± 0.80 days. The natural parasitism rate determined that O. insularis oviposited at a mean height of 81.89 ± 16.60 cm, with a preference for the underside of the leaf in 80% and the upper surface in 20% of 12 clutches (n = 165 eggs). 50% were parasitized by Telenomus sp. (n = 82 eggs).

• Autor principal: Vera Aguirre, Angie Lisbeth (author)
• Formato: bachelorThesis
• Publicado em: 2025
• Assuntos: Telenomus; Biología; Manejo integrado; Plagas
• Acesso em linha: http://dspace.utb.edu.ec/handle/49000/18004