Banca de DEFESA: APARECIDO VENANCIO MARTINS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : APARECIDO VENANCIO MARTINS
DATA : 28/06/2018
HORA: 12:30
LOCAL: Instituto de Agronomia
TÍTULO:

Incidence and study for mitigation of the redness strawberry.

PALAVRAS-CHAVES:

disease, Fragaria x Ananassa, Control, organic cultivation

PÁGINAS: 51
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitotecnia
RESUMO:

Strawberry plants are affected by many diseases, with the most significant being bacteria, and fungi of the aerial part and the soil. Among these diseases is one of unknown etiology: the vermilion of the strawberry plant (VSP). In recent years it has led to serious losses for strawberry-producing farmers in various regions of the country. Thus, two studies were developed in order to investigate the incidence of VSP in strawberries produced in an organic cultivation system in the south region of Minas Gerais. The experimental design used was randomized blocks — the experimental field was divided into four blocks with four replicates and five treatments. The first study, which concerned the incidence of VSP, was done in the municipality of Senador Amaral with a commercial crop in an organic production system — with management for productive purposes — without repetition of the treatments. The variable evaluated was the incidence and evolution of VSP in a production unit. The inputs used were as follows: limestone, natural phosphate, chicken bedding, cow urine, and Bordeaux mixture. The incidence and evolution of VSP were evaluated during the 180 days after treatment (DAT. In the second study, the experiment was conducted and the incidence and evolution of VSP as well as strawberry production were evaluated. The field tests were done with different proportions of natural phosphate and rock powder and the same proportions of sodium hypochlorite, plant litter, efficient microorganisms, limestone, vegetal litter of emerald grass, and a green fertilization of corn and black mucuna. The characteristics of the VSP were evaluated during the 240 days of the research. The Oso Grande cultivar was used. According to the results obtained in this experiment, the presence of the VSP disease was not significant — it had a low incidence percentage, with 0.29% at 120 DAT, 2.94% at 150 DAT, 4.12% at 180 DAT, 4.41% at 210 DAT, and 4.41% at 240 DAT. It was verified that treatment 1 (T1) was superior to the others — it resulted in an incidence index of zero. For the production variable, the T2 treatment led to the highest productivity index (T2 > T3 > T1> T4 > T5). In general, in terms of plant health, the results of the experiment were satisfactory and surprising. There was no incidence of acari or aphids (index of zero) and no incidence of the most common disease, Mycosphaerella fragariae (index of zero). There were incidences of other diseases from the sixth month onward; however, the indices were low, as shown in the graphs. The proposed treatments gave good results in terms of plant health, with indices much lower than expected for the cultivar analyzed. These results were probably due to the use of the green fertilization, and treatment of the seedlings with sodium hypochlorite, organic matter, and the efficient microorganisms

MEMBROS DA BANCA:
Interno - 2186690 - JOAO SEBASTIAO DE PAULA ARAUJO
Interno - 1863063 - LUIZ AURELIO PERES MARTELLETO
Externo à Instituição - LEONARDO CIUFFO FAVER - FGV