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Tritrophic interaction between the Mexican sunflower, the aphid Aphis gossypii and natural enemies in a greenhouse experiment
Venâncio, Henrique; Bianchi, Renata Alexandre; Lobato, Thaís Oliveira Santos; Sampaio, Marcus Vinícius; Santos, Jean Carlos.
  • Venâncio, Henrique; Universidade de São Paulo. Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto. Ribeirão Preto. BR
  • Bianchi, Renata Alexandre; Universidade de Franca. Faculdade de Tecnologia de Franca. Franca. BR
  • Lobato, Thaís Oliveira Santos; Universidade Federal de Uberlândia. Instituto de Biologia. Uberlândia. BR
  • Sampaio, Marcus Vinícius; Universidade Federal de Uberlândia. Instituto de Ciências Agrárias. Uberlândia. BR
  • Santos, Jean Carlos; Universidade Federal de Sergipe. Centro de Ciências Biológicas e da Saúde. Departamento de Ecologia. São Cristóvão. BR
Acta sci., Biol. sci ; 42: e47120, fev. 2020. ilus, tab, graf
Article in English | LILACS, VETINDEX | ID: biblio-1460916
ABSTRACT
The establishment of invasive plants negatively affects natural environments. Invasive herbivores that attack weeds can be used as a form of biological control, but natural enemies of herbivores must be associated with this interaction to prevent the invasive phytophagous from become a local pest. We performed a greenhouse experiment to evaluate how the cotton aphid, Aphis gossypii, a ok and invasive herbivore, affects the performance of the weed Tithonia diversifolia, the Mexican sunflower. We also examined the relationship between the aphid and local natural enemies. Seedlings of T. diversifolia were divided in two groups one infested by the aphid and another not infested. After 22 days, we assessed the relationship between aphid abundance and the presence of natural enemies (Coccinelidae and Aphidius platensis) on infested plants, and compared the vegetative performance of the two seedling groups. Both natural enemies were positively related to high aphid density on infested plants. Plants infested by the aphid presented foliar necrosis and senescence, and a reduction of around 50% in leaf number, foliar area, shoot length and shoot, root and total plant weight compared to non-infested plants. These results indicate potential biological control of Mexican sunflower seedlings by the cotton aphid, and control of this aphid by the studied natural enemies.
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Full text: Available Index: LILACS (Americas) Main subject: Aphids / Helianthus Country/Region as subject: Mexico Language: English Journal: Acta sci., Biol. sci Year: 2020 Type: Article Institution/Affiliation country: Universidade Federal de Sergipe/BR / Universidade Federal de Uberlândia/BR / Universidade de Franca/BR / Universidade de São Paulo/BR

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Full text: Available Index: LILACS (Americas) Main subject: Aphids / Helianthus Country/Region as subject: Mexico Language: English Journal: Acta sci., Biol. sci Year: 2020 Type: Article Institution/Affiliation country: Universidade Federal de Sergipe/BR / Universidade Federal de Uberlândia/BR / Universidade de Franca/BR / Universidade de São Paulo/BR