Banca de DEFESA: DEBORA OLIVEIRA GOMES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : DEBORA OLIVEIRA GOMES
DATE: 31/08/2021
TIME: 15:00
LOCAL: meet.google.com/yaa-gorh-vng
TITLE:

Biocontrol of defoliating caterpillars on kale (Brassica oleracea L. var. acephala) with entomopathogenic fungi 

KEY WORDS:

cabbage caterpillars, insect pest, alternative control, gas exchange.

PAGES: 49
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Kale (Brassica oleracea L. var. acephala.) is a vegetable of great food and socioeconomic importance, as it is an excellent source of nutrients and income for family farms. The occurrence of insect-pests is one of the main problems faced in the cultivation of this leafy vegetable, with the complex of defoliating caterpillars being the main pests in kale production. Among the control methods, the application of synthetic insecticides is the most used, but there are other control alternatives, such as the use of entomopathogenic fungi. The objective of this study was to evaluate the efficacy in the control of defoliating caterpillars by entomopathogenic fungi, as well as the influence of this technology in agroeconomic and physiological aspects of kale. Field and greenhouse experiments were conducted in randomized and entirely randomized block design, respectively. In both experiments, the treatments consisted in the application of isolates of entomopathogenic fungi, being Beauveria bassiana, Isaria sp., Metarhizium anisopliae and Trichoderma asperellum, plus chemical insecticide based on deltamethrin as control. The variables evaluated were pest attack severity, number of commercial and non-commercial leaves, number of total leaves, commercial yield, total yield, caterpillar population density and gas exchange. Field results reveal that plants treated with the fungi Beauveria, Metarhizium and Trichoderma showed levels of severity, number of leaves and commercial productivity similar to the chemical treatment, and lower rates of population density of the defoliating caterpillar complex. The application of Metarhizium and chemical treatments showed better photosynthetic performance. In vegetation house, Trichoderma fungus showed higher plant height and robustness index compared to insecticide treatment. Fungi Beauveria, Metarhizium and Trichoderma showed commercial leaves and commercial productivity similar to insecticide treatment. Entomopathogenic fungi can be used to contribute to sustainable management in kale production.

BANKING MEMBERS:
Interno - 1065086 - GLEDSON LUIZ SALGADO DE CASTRO
Externo à Instituição - HOZANO DE SOUZA LEMOS NETO - UFERSA
Externo à Instituição - ITALO MARLONE GOMES SAMPAIO
Presidente - 3266519 - TELMA FATIMA VIEIRA BATISTA