Banca de DEFESA: WANESKA DOS SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : WANESKA DOS SANTOS
DATE: 08/09/2021
TIME: 09:00
LOCAL: Arapiraca - Alagoas
TITLE:

Response of Carpophilus spp. to the odors of the pine tree blossom and the fruits of pine cones and guava in an advanced stage of maturation

KEY WORDS:

Sugar apple. Nitidules. Floral odors. Fruity aroma. Pollinators. Volatiles

PAGES: 68
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Manejo e Tratos Culturais
SUMMARY:

Among the species belonging to the family of annonaceae, the pine cone (Annona squamosa L.), is one of the representatives of the family of greatest socioeconomic importance worldwide. In Brazil, its largest production is concentrated in the Northeast region, with family farming being responsible for all the pine cones produced in the country. However, the production of fruits of this species is below its potential due, among other factors, to deficient pollination, since normally the presence of its pollinators is insufficient to reach satisfactory productions. Artificial pollination has good results, but it is costly. Thus, the objective of this work was to use volatile organic compounds (odors) that are attractive to Carpophilus spp. both in the laboratory and in the field. The volatile organic compounds (VOCs) of the pine cone and guava fruits, as well as the VOCs emitted by the pine tree flowers, were collected using the dynamic headspace system, using Porapak Q adsorbent (80/100 mesh, 0.05 g; Supelco). The air was injected into the plastic bag, passing through an activated carbon filter at a flow of 400 mL/min. for both fruits and flowers and tubes with Porapak Q were used at the top of the bag and the air was collected at a flow rate of 350 mL/min. for each fruit/flower. The collection of VOCs from the pine cone flowers lasted twelve hours starting at 5:00 pm, as this time was marked by the release of a strong sweet odor, which remains until the next day. Previously, the glass tubes were washed with hexane and heated in ovens at 100 °C for 60 min, for the "activation" of the adsorbent. At the end of the aeration, the desorption of volatiles in Porapak Q was carried out passing 0.5 mL of hexane solvent and stored in vials at -20 °C. As verified, the volatiles of the guava fruit, the pine cone flower and the pine cone fruit showed that they are attractive to the pine tree pollinators, both in the laboratory and in the field. The VOCs of the guava fruit and the pine cone in advanced stages of maturation attracted the pine pollinating insect, as well as the flower VOCs. That's because a floral odor similar to ripe or decaying fruit can attract nidullid beetles. Since, these insects are attracted by floral scents that have a “fruitful” aroma. The flowers probably mimic fruit aromas in order to attract these insects. The use of attractive baits in pine cone orchards, aiming to increase productivity, showed satisfactory results, increasing productivity in commercial orchards by more than 80%.

BANKING MEMBERS:
Presidente - 287.291.704-78 - JOÃO GOMES DA COSTA - EMBRAPA
Externa à Instituição - CENIRA MONTEIRO DE CARVALHO - IFAL
Externa à Instituição - EDJANE VIEIRA PIRES - UNEAL