Banca de DEFESA: CHRYSLANE BARBOSA DA SILVA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : CHRYSLANE BARBOSA DA SILVA
DATE: 31/10/2022
TIME: 14:00
LOCAL: Sessão remota - Plataforma Google Meet
TITLE:

 

 

STUDY OF THE CHEMICAL ECOLOGY OF Acharia auromacula Schaus, 1896 (LEPIDOPTERA: LIMACODIDAE) and Caligo illioneus illioneus Cramer, 1775 (LEPIDOPTERA: NYMPHALIDAE)

KEY WORDS:

 

 

Chemical ecology. Lepidoptera. Semiochemicals. Pests control

PAGES: 154
BIG AREA: Multidisciplinar
AREA: Biotecnologia
SUBÁREA: Biotecnologia em Recursos Naturais
SUMMARY:

 

Arecaceae comprises palm trees that have great potential for the agricultural market, however, its expansion ends up being limited by factors such as the presence of pest insects. Oil palm (Elaeis guineenses Jacq.) is a palm tree cultivated in the North and Northeast regions of Brazil and has a diversity of pests associated with the culture, which in most cases do not have registered products for their control. As a way to minimize the presence of insects in the area of cultivation and use of pesticides, new control strategies are used, such as the behavioral one, which uses semiochemicals, mainly pheromones, to control insect pests in agricultural environments. The aim of this study was to investigate the morphology and typology of the sensilla in the antennae, histology of the pheromone gland, location of the androconial region and obtain the chemical composition in Acharia auromacula and Caligo illioneus illioneus. At first, insects were collected in oil palm planting areas on the farms of Grupo Agropalma SA, in the city of Thailand – Pará. The material (eggs, caterpillars and pupae) was sent to the Natural Resources Research Laboratory and maintained in a breeding room until obtaining adult insects for analysis. For both species, the morphology of the antennae and identification of the sensilla were carried out by Scanning Electron Microscope (SEM), and the extracts of the different parts of the insects' body (♂ and ♀) were obtained by extraction with HPLC grade hexane solvent and analyzed by GC /EAG, CG/DIC and CG/EM. For A. auromacula, histological analysis was performed with an ovipositor and for C. i. illioneus used the androconia region. As results for A. auromacula it was verified sexual dimorphism in the antennas and identified several types of sensilla, such as basiconic, trichoid, auricillic and coeloconic in both sexes, being able to act in the chemoreception. In C.i. illioneus there is no dimorphism in the antennae and among the types of sensilla stand out basiconic, trichoid and coeloconic in both sexes. The pheromone gland was located in the ovipositor of the female A. auromacula, which has a set of glandular cells. the majority compound is the Decanal. In C.i. illioneus in males the androconia region on the wings and abdomen was observed, the chemical composition profile demonstrates that the androconia region has male-specific compounds. Therefore, this information provides important data on the chemical communication of the A. auromacula moth and the C. i. illioneus.

 

BANKING MEMBERS:
Presidente - 1119939 - ANTONIO EUZEBIO GOULART SANTANA
Interna - 1294906 - RUTH RUFINO DO NASCIMENTO
Externo ao Programa - 2149347 - HENRIQUE FONSECA GOULART
Externo à Instituição - JOSÉ MAURICIO SIMÕES BENTO
Externo à Instituição - TIAGO CARDOSO DA COSTA LIMA - EMBRAPA
Externo à Instituição - RAFAEL MAJOR PITTA
Externo à Instituição - PAULO ROBERTO RIBEIRO DE MESQUITA