Banca de DEFESA: VALDEMIR ALBUQUERQUE DA SILVA JÚNIOR

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : VALDEMIR ALBUQUERQUE DA SILVA JÚNIOR
DATE: 29/02/2024
TIME: 14:00
LOCAL: Sala de videoconferência do Programa de Pós-graduação
TITLE:

DIFFERENTIAL ADAPTABILITY BETWEEN ISOLATES OF bean golden mosaic virus AND Macroptilium yellow spot virus IN LEGUMINOUS HOSTS, AND EVALUATION OF THE LETHAL EFFECT OF ETHANOLIC EXTRACTS OF Annona muricata and A. squamosa ON ADULTS OF Bemisia tabaci

KEY WORDS:

Alternative control, Annonaceae, Begomovirus, viral adaptability, whitefly

PAGES: 70
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitossanidade
SPECIALTY: Fitopatologia
SUMMARY:

Among the various phytosanitary problems affecting bean crops, begomoviruses stand out as one of the main concerns. Although several species have been observed naturally infecting these hosts, two viruses in particular, bean golden mosaic virus (BGMV), assume significant economic importance in Brazil. The genus Begomovirus (family Geminiviridae) is characterized by its single-stranded circular DNA genome, encapsulated in geminate quasi-icosahedral particles. They are transmitted in a persistent-circulative manner by insects of the Bemisia spp. complex and have the ability to infect a wide variety of dicotyledonous plants. Macroptilium yellow spot virus (MaYSV), a begomovirus that initially originated in uncultivated legumes, has emerged as a significant pathogen for common beans in the Northeast region of Brazil. The incidence of these begomoviruses in bean crops can cause serious economic losses due to reductions in productivity and grain quality. Therefore, it is crucial to implement integrated pest and disease management measures to mitigate the impacts of these viruses. The aim of this study was to evaluate the ability of infectious clones of BGMV and MaYSV to cause systemic infection in common beans, fava beans, and Macroptilium lathyroides. For this purpose, single and mixed infection assays of the isolates were conducted, as well as transmission assays by the whitefly B. tabaci MEAM1. Based on the results, it was observed that BGMV demonstrated better aptitude in causing systemic infection in all three host plants in both assays. Additionally, the lethal effect of ethanolic extracts of Annona muricata (soursop) and A. squamosa on adult whiteflies was evaluated. The results indicated that both extracts were toxic to the insect, with the soursop extract being more toxic compared to the custard apple extract in all bioassays.

COMMITTEE MEMBERS:
Presidente - 2149632 - SARAH JACQUELINE CAVALCANTI DA SILVA
Interno(a) - 1065779 - ADRIANO MARCIO FREIRE SILVA
Interno(a) - 1369412 - GAUS SILVESTRE DE ANDRADE LIMA
Externo(a) à Instituição - AYANE FERNANDA FERREIRA QUADROS - UFV
Externo(a) à Instituição - LEONARDO DA FONSECA BARBOSA