Efeitos da temperatura sobre o desenvolvimento, sobrevivência e reprodução de aenasius sp. (hymenoptera: encyrtidae)

• Ano de defesa: 2025
• Autor(a) principal: Nascimento, Kallyne Karen Andrade
• Orientador(a): Silva, Carlos Alberto Domingues da
• Banca de defesa: Malaquias, José Bruno, Corrêa, Élida Barbosa
• Tipo de documento: Tese
• Tipo de acesso: Acesso embargado
• Idioma: por
• Instituição de defesa: Universidade Estadual da Paraíba
• Programa de Pós-Graduação: Programa de Pós-Graduação em Ciências Agrárias - PPGCA
• Departamento: Centro de Ciências Agrárias e Ambientais – CCAA
• País: BR
• Palavras-chave em Português: Gossypium hirsutum; inimigo natural; exigências térmicas; cochonilha-do algodão
• Área do conhecimento CNPq: FITOSSANIDADE
• Link de acesso: https://repositorio.uepb.edu.br/handle/123456789/75492

Phenacoccus solenopsis (Hemiptera: Pseudococcidae) is one of the main cotton pests, typically managed with broad-spectrum insecticides that can also harm beneficial insects. Therefore, sustainable biological control using predators and parasitoids is essential. In 2023, a new parasitoid species of the genus Aenasius (Hymenoptera: Encyrtidae) was discovered. Understanding its biology and thermal requirements is crucial, since temperature strongly influences the distribution, metabolism, and development of insect species. This study aimed to determine the effects of temperature on the development, survival, and reproduction of Aenasius sp. The experimental design was completely randomized, with five treatments and five replications. Treatments consisted of fresh cotton leaves infested with third-instar nymphs of P. solenopsis, exposed to parasitism by Aenasius sp. females and maintained at temperatures of 15, 20, 25, 30, and 35 °C. The highest parasitism and emergence rates, as well as the shortest developmental periods of Aenasius sp. from oviposition to mummy formation and adult emergence, occurred within the 25 35 °C range. The shortest oviposition and post-oviposition periods, together with the highest fecundity (number of eggs per female) and longest female and male longevity, were observed between 20 and 25 °C. Conversely, the greatest lengths of right and left tibiae and head capsule widths in both females and males of Aenasius sp. were recorded between 20 °C and 35 °C. The municipalities of Iuiu, Malhada, and Palmas de Monte Alto (Bahia), Barbalha, Juazeiro do Norte, and Missão Velha (Ceará), and Itaporanga and Patos (Paraíba) show the greatest potential for annual generations of Aenasius sp. These findings are crucial for optimizing augmentative biological control programs targeting P. solenopsis infestations in cotton crops, particularly in the high-temperature regions of Bahia, Ceará, and Paraíba, Brazil.