Banca de DEFESA: ESTER LETICIA DA SILVA AMARAL

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ESTER LETICIA DA SILVA AMARAL
DATE: 16/02/2024
TIME: 14:00
LOCAL: CECA/UFAL
TITLE:

RESISTANCE OF CREOLE MAIZE VARIETIES TO Sitophilus zeamais Mots., 1855 (COLEOPTERA: CURCULIONIDAE).

KEY WORDS:

Zea mays L., antixenosis, antibiosis, biochemical composition.

PAGES: 47
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Entomologia Agrícola
SUMMARY:

The mayze crop (Zea mays L.) is of great importance in rural settlements and in different forms of social organization of production, including family, indigenous and quilombola agriculture, considered maintainers and guardians of the variability and natural biodiversity of cultivated crops with the maintenance and multiplication of creole seeds, characterized by local varieties, cultivated through generations. Among the phytosanitary problems faced in the storage of mayze seeds, the corn weevil, Sitophilus zeamais Mots., 1855 (Coleoptera: Curculionidae), is considered a key pest of corn in all producing regions, causing several quantitative and qualitative damage. Thus, the evaluation of the resistance of creole mayze varieties to S. zeamais attack was carried out through host preference bioassays, susceptibility index (SI), instantaneous population growth rate (ri), weight loss (g), in addition to determining moisture (%) and ash (%) contents. The results obtained demonstrated greater host preference for the creole variety Palha Roxa and lower preference of S. zeamais for the commercial hybrid Caatingueiro. The state of use of the corn grains in the bioassays, (i) unattacked and intact grains, (ii) unattacked and broken grains, (iii) attacked and intact or (iv) attacked and broken grains also influenced the choice of S. zeamais. In general, susceptibility indices ranged from 0.01 for the Caatingueiro variety to 0.034 for the Jabotão creole variety, corroborating the instantaneous population growth rates, varying between 0.026 for the commercial hybrid Caatingueiro and 0.046 for the Palha Roxa creole variety. The Caatingueiro variety also showed lower weight loss (35.98g), while Palha Roxa (188.76g) showed significantly greater weight loss, in addition to high moisture (%) and ash (%) content.

COMMITTEE MEMBERS:
Presidente - 1389433 - MARIANA OLIVEIRA BREDA
Interno(a) - 2337920 - ROSEANE CRISTINA PREDES TRINDADE
Externo(a) à Instituição - JOÃO GOMES DA COSTA