Banca de DEFESA: BRUNA CAROLINA SERAFIM TECKIO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : BRUNA CAROLINA SERAFIM TECKIO
DATA : 28/02/2023
HORA: 07:30
LOCAL: SALA DO PPGASP
TÍTULO:

COST ANALYSIS OF ON FARM PRODUCTION OF ENTOMOPATHOGENIC BACTERIA FOR THE MANAGEMENT OF LEPIDOPTERAN PESTS IN COTTON CROPS

PALAVRAS-CHAVES:

Biological control, Entomopathogens, Fall armyworm, Tank mix, Liquid fermentation, Production costs.

PÁGINAS: 70
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Fitossanidade
ESPECIALIDADE: Entomologia Agrícola
RESUMO:

The caterpillar complex is a limiting factor in cotton crop, due to the damage caused on reproductive structures, such as flower buds and bolls. A sustainable alternative for the management of this pests is the application of entomopathogenic bacteria, produced on a large scale inside the farms (on farm). However, although groups of agricultural commodities are adhering to the production of these bacteria, information on the viability of this on farm production model is scarce. In addition, the effectiveness of this management depends on compatibility studies of the bacteria in association with pesticides commonly used in cotton crop. Therefore, the objective of this research was to evaluate the compatibility of pesticides commonly used in cotton crop with Bacillus thuringiensis and the cost of on farm production of this bacteria, for the management of lepidopterans in cotton crop. For the in vitro compatibility test, 19 pesticides associated with B. thuringiensis (Bt) were evaluated on the vegetative and reproductive growth of the bacteria (Biological Index). The products that showed bacterial growth were evaluated in the laboratory on Spodoptera frugiperda caterpillars fed with cotton leaves and artificial diet. Those with mortality above 60% were selected for the experiment in semi-field and field. For the cost analysis of on farm production of the bacteria, they were compared with the values of the commercial product based on Oxime Methylcarbamate. The results obtained in the compatibility study indicate that the pesticides Diafenthiuron, Acetamiprid and Oxime Methylcarbamate were compatible with B. thuringiensis. The association Bt + Oxime Methylcarbamate was effective in controlling S. frugiperda caterpillars in the field, with mortality above 80% in the first days of evaluation. It was found that on farm production of bacteria is economically viable, as it generates a 50% cost reduction compared to the commercial product Oxime Methylcarbamate. In addition, in relation to the applications, Bt on farm provided a reduction of 59.5% in relation to the commercial pesticides due to the need to apply more commercial product (1.2 liters) per hectare. Thus, it is possible to conclude that the production of B. thuringiensis on farm is economically viable for the control of lepidopteran pests in cotton crops and the insecticide Methylcarbamate can be used in association with this bacteria for the management of S. frugiperda in this culture.

 

MEMBROS DA BANCA:
Presidente - 101366004 - MONICA JOSENE BARBOSA PEREIRA
Interno - 118802007 - HILTON MARCELO DE LIMA SOUZA
Externo ao Programa - 80797005 - CARLA GALBIATI
Externo à Instituição - LUIZ PANHOCA - UFPR