Banca de DEFESA: ALEX BÉU SANTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ALEX BÉU SANTOS
DATE: 29/08/2022
TIME: 08:00
LOCAL: Ceca
TITLE:

Activity and determination of parameters for the use of the pheromone of Opsiphanes invirae (Lepidoptera:Nymphalidae) as a control strategy in field

KEY WORDS:

Volatile organic compounds (VOC's); Mass trapping; Solid Phase Micro
Extraction; Headspace; PDMS; Kovats indices; Molasses.

PAGES: 46
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Entomologia Agrícola
SUMMARY:

Opsiphanes invirae (Hübner, 1818) (Lepidoptera: Nymphalidae) is a pest that occurs
throughout Brazil and, in its young phase, causes defoliation in maples, which causes a
reduction in productivity. Pará, where the largest oil palm plantations (Elaeis guineensis
Jacquin, Arecaceae) in the country are concentrated, is one of the states most affected
by the pest attack. Due to the damage caused by the conventional practice of pest
control, it is necessary to seek less harmful forms of control. Thus, the objective of this
work was to prove the activity of the O. invirae pheromone and determine parameters
for its use in the control of the pest, in the field, from the use of traps for monitoring and
population control. It was carried out at the Natural Resources Research Laboratory
(LPqRN), which belongs to the Campus of Engineering and Agricultural Sciences
(CECA) of the Federal University of Alagoas (UFAL), in the city of Maceió, state of
Alagoas, and on the farms of the company Agropalma, area of commercial oil palm
cultivation, located in the municipality of Thailand, Pará. The study of the volatiles
present in the sugarcane molasses obtained by SPME/GC/MS was carried out in the
laboratory, which resulted in 21 compounds present in the sugarcane molasses, of which
2 were confirmed by the standards commercials. The confirmed compounds, acetoin
and Z9:14Ac and the one suggested in chromatograms 3-methyl-1-butanol, are efficient
attractants for insects of the lepidopteran order. For the field experiment, traps made
with plastic bags were used, containing, inside, sugarcane molasses as a food attractant
and the pheromone to monitor the capture of insects. Two containers with the attractants
were used, in one, a rubber set type, the pheromone was placed, and in the other, a pet-
type bottle with a capacity of 500 mL with small perforations in its upper part, holding
about 100 ml of the food attractant, which will have in its composition 50% sugarcane
molasses and 50% water. The two containers were fixed inside the bag by 15 and 25 cm
wires. These traps were 80 cm high by 55 cm long and were fixed to the plants, with an
opening of eight centimeters, for the entry of insects. Field tests allow us to conclude
that treatment one, containing the male pheromone mixture of Opsiphanes invirae, (E)-
β-farnesene); (E)-nerolidol and (Z)-7-heptadecene, showed greater efficiency in
capturing both male and female insects, which proves that the use of this formulation in
combination with sugarcane molasses can significantly contribute to reduce the
population density of the pest in oil palm plantations.

BANKING MEMBERS:
Presidente - 2149347 - HENRIQUE FONSECA GOULART
Interno - 1119939 - ANTONIO EUZEBIO GOULART SANTANA
Interno - 1369412 - GAUS SILVESTRE DE ANDRADE LIMA
Interno - 1407179 - ROBERTO RAMOS SOBRINHO
Externo à Instituição - GILSON SANCHES CHIA
Externa à Instituição - JOSEANI CASTRO DA SILVA