Banca de DEFESA: ANDRÉ DOS SANTOS MELO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : ANDRÉ DOS SANTOS MELO
DATE: 24/02/2026
TIME: 08:00
LOCAL: Auditório CEAGRI II
TITLE:

MANAGEMENT OF THE MITE Oligonychus punicae (Hirst) (ACARI: TETRANYCHIDAE) IN GRAPEVINES IN THE SÃO FRANCISCO VALLEY, PERNAMBUCO, BRAZIL

KEY WORDS:

Red spider mite, integrated pest management, sampling technique, resistance, abamectin, indirect interaction

PAGES: 88
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Entomologia Agrícola
SUMMARY:

The red spider mite Oligonychus punicae (Hirst) is an important pest in several crops worldwide, including grapevines in the São Francisco Valley region of Brazil. In this region, O. punicae occurs at high infestation levels, causing severe damage to grapevine crops and being recognized as one of the most important phytophagous mite species on this crop. The high temperatures of the region, combined with production system management practices and the intensive use of acaricides, have likely contributed to the rapid development and population growth of this species. The lack of information on pest management, such as sampling methods, action and control thresholds, as well as registered chemical products, compromises field monitoring and decision-making. In addition, interactions among the pest, the host plant, and other competing herbivores are still poorly understood. Therefore, the overall objective of this study was to improve the management of O. punicae on grapevines in the São Francisco Valley region through a new sampling approach, as well as to diagnose the occurrence of resistance to abamectin and to evaluate interactions among tetranychid mites on this crop. Our results indicate that lower and upper economic thresholds guide the adoption of control measures according to the phenological stage of the crop, with the economic threshold established at 36% and the economic injury level at 40%. In addition, O. punicae exhibited field resistance to abamectin and bifenthrin, suggesting a pattern of multiple resistance. Oligonychus punicae proved to be a stronger competitor among tetranychid mites on grapevine, and the effects of prior infestation were not restricted to the feeding site of O. punicae, indicating that plant-induced systemic resistance may also be involved. Thus, this study provides important information for the management of O. punicae on grapevines.

COMMITTEE MEMBERS:
Presidente - MANOEL GUEDES CORREA GONDIM JUNIOR
Interno - HERBERT ALVARO ABREU DE SIQUEIRA
Interno - PAULO FELLIPE CRISTALDO
Externo à Instituição - JOSÉ EUDES DE MORAIS OLIVEIRA
Externa à Instituição - DEBORA BARBOSA DE LIMA MELO