Banca de QUALIFICAÇÃO: ÉDER BRUNO REBELO DA SILVA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ÉDER BRUNO REBELO DA SILVA
DATE: 30/06/2022
TIME: 14:00
LOCAL: Sala virtual Google meet
TITLE:

IDENTIFICATION OF ROOT-KNOT NEMATODE IN VEGETABLES CROPS IN THE NORTHEASTERN REGION OF PARAENSE

KEY WORDS:

Meloidoginosis. Population survey. Horticulture in the Amazon.

PAGES: 63
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Fitotecnia
SPECIALTY: Manejo e Tratos Culturais
SUMMARY:

The occurrence of root-knot nematodes in vegetable growing areas causes damage to production. In this scenario, studies for the identification and distribution of root-knot nematodes in the northeast region of Pará, may support control and prevention methodologies. Thus, the objective of this work was to survey and map the occurrence of root-knot nematodes (Meloidogyne spp.) in vegetable-producing areas in northeastern Pará. For this, soil and root collections were carried out in the municipalities belonging to the micro-region of the Caeté river basin, namely: Bragança, Bonito, Capanema, Nova Timboteua, Primavera, Quatipuru, Santa Luzia do Pará, Santarém Novo, São João de Pirabas and Tracuateua. Samples of various vegetables were collected, namely: lettuce, carirú, chicory from the Amazon, coriander, cabbage, spinach, jambu, pumpkin, pepper, chili pepper, cucumber and tomato. The extractions were performed at the Nematology Laboratory (LabNema), at UNESP/FCAV, in Jaboticabal – SP. For soil samples, the method of centrifugal flotation in sucrose solution was used and for the roots, the method of Coolen and D'Herde, then the populations were estimated and later the species were identified. The identification of the species occurred by the perineal pattern of the female, the labial region of the males and the isoenzymatic phenotype for esterase. In order to represent the population density of eggs and juveniles, chloropletic maps were prepared using the quantile method. To understand the history of the area, questionnaires were applied to the producers. Thus, it was evaluated: history of the areas, number of galls, absolute density of nematodes in the soil and roots, relative density, incidence by location and frequency of nematodes by culture. From the survey, symptoms in "reboleiras", roots with a high amount of galls, absence of fallow in most production areas, presence of weeds, in addition to other management practices that can impact the dissemination and maintenance of nematodes. Through the results, the presence of Meloidogyne spp. in all samples collected. The species M. incognita, M. javanica and M. enterolobii were identified. It was also found that M. incognita was the most incident species. It was observed the presence of M. incognita in the cultures of chicory of the Amazon, carirú, coriander, jerimum, cucumber and pepper, it was noticed the presence of M. javanica in the cultures of jambu and tomato. In addition, mixed populations of M. incognita and M. javanica were identified for the kale crop and M. incognita and M. enterolobii for the chili pepper crop

BANKING MEMBERS:
Interna - 1551252 - GISELE BARATA DA SILVA
Interna - 2143334 - RAFAELLE FAZZI GOMES
Externo à Instituição - ARINALDO PEREIRA DA SILVA - UNIFESSPA
Externa à Instituição - EDICLEIDE MACEDO DA SILVA