Banca de QUALIFICAÇÃO: CLAUDINETE DOS SANTOS SILVA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : CLAUDINETE DOS SANTOS SILVA
DATE: 22/12/2021
TIME: 08:00
LOCAL: Remoto
TITLE:

Influence of volatile compounds common to sex pheromone and host fruits on reproductive behavior of male Anastrepha obliqua (Diptera: Tephritidae)

KEY WORDS:

tephritids, infochemicals, male-attractants, aphrodisiac, synergic effect

PAGES: 60
BIG AREA: Ciências Exatas e da Terra
AREA: Química
SUBÁREA: Química Orgânica
SPECIALTY: Evolução, Sistemática e Ecologia Química
SUMMARY:

The fruit fly Anastrepha obliqua (Diptera: Tephritidae) represents one of the main pests in the world's fruit culture, as it is a polyphagous insect whose larvae feed on the fruit pulp, causing great economic losses for producing and exporting countries. A promising tool for the integrated management of this pest is the use of volatile compounds from host fruits combined with male pheromone. These substances are used by conspecific males to attract other males in order to potentiate the emission of the sex pheromone, attracting females for mating. There are few studies related to chemical communication of the species under study, and no comparative research on the chemistry of volatile compounds common to hosts and the pheromone released by males has been reported in the literature. To understand the role of volatile organic compounds present in mixtures released by host fruits and virgin males of this insect-pest, in different stages of reproductive behavior (calling and copulation), the present work aimed to study the attraction of virgin males to formulations of mixtures of common compounds to pheromonal mixture released by virgin males of A. obliqua and to host fruits guava, carambola and mango, through behavioral bioassays conducted in the laboratory. Therefore, the dynamic headspace technique was used to obtain extracts containing the volatile compounds released by sexually mature males and by the host fruits, and the compounds common to the pheromone mixture and the host fruits were identified through comparisons of literature data. The results showed that, among the 14 mixtures tested, derived from different fruits, twelve were attractive to virgin males of A. obliqua, when compared to the control treatment (mixture of male volatiles with fruit volatiles), namely: M1FG , M2FG, M3FG, M4FG and M5FG, consisting of compounds common to guava and sex pheromone; M2FC, M3FC and M4FC, made up of compounds common to carambola and sex pheromone and M2FM, M3FM, M4FM, made up of compounds common to mango and sex pheromone. The M5FM mixture exerted greater attractiveness than the control treatment, while the M1FC and M1FM mixtures, common to sex pheromone and to carambola and mango fruits, respectively, elicited less attraction in males than the control treatment. New bioassays must be conducted to evaluate the effect of these formulations on the sexual performance of males of A. obliqua

BANKING MEMBERS:
Presidente - 1294906 - RUTH RUFINO DO NASCIMENTO
Interna - 426640 - FABIANE CAXICO DE ABREU GALDINO
Externo ao Programa - 2089586 - FRANCIS SOARES GOMES
Externo à Instituição - JOHNNATAN DUARTE DE FREITAS - CEFET-Al