Banca de DEFESA: JOSIANE PACHECO DE ALFAIA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : JOSIANE PACHECO DE ALFAIA
DATE: 28/02/2023
TIME: 09:00
LOCAL: Por videoconferência
TITLE:

"ACAROFAUNA ASSOCIATED WITH Cocos nucifera L. GREEN DWARF VARIETY AND MANAGEMENT WITH ENTOMOPATHOGENIC FUNGI IN THE BRAZILIAN AMAZON BIOME"

KEY WORDS:

Arecaceae. biological control. Aceria guerreronis. Steneotarsonemus furcatus. phytophagous mites. microbial control. predators 

PAGES: 89
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

The coconut crop (Cocos nucifera L.) suffers attacks from pests at all stages of development, especially phytophagous mites that attack the fruits and reduce productivity, especially Aceria guerreronis Keifer (Eriophyidae) and Steneotarsonemus furcatus (Tarsonemidae ). Several chemical products are registered for the control of A. guerreronis, however, this pest inhabits the perianth of the fruit, protected by the bracts, making control difficult. Therefore, biological control is seen as a safe tool for living organisms and the environment. Since the market has become more demanding for more sustainable products, predatory mites and entomopathogenic fungi are important in the integrated management of these pests. In this context, the objective was to identify the fauna of mites in fruits of green dwarf coconut palm plants, through the study of the population fluctuation of A. guerreronis, S. furcatus and predators, molecular identification of entomopathogenic fungi and evaluation of the potential of entomopathogenic fungi as alternative control of A. guerreronis and S. furcatus. The study was conducted in a commercial green dwarf coconut plantation located in the municipality of Santa Izabel do Pará-Pará. Monthly collections of fruits, with and without injuries caused by mites, from clusters 13 to 17, were carried out. In the bunches, 8,818 fruits were evaluated, of which, 88.31% were without injuries, 7.25% were with injuries caused only by A. guerreronis, 3.24% by S. furcatus and 1.17% with both injuries in the same fruit. A. guerreronis represented 99.75% of the 563,170 mites collected, S. furcatus was collected from only 87 fruits. Predatory mites of the Phytoseiidae family were the most abundant, eight species were identified, Amblyseius aerialis (Muma) was the predominant one. The native fungi Metarhizium sp., Trichoderma sp. and the fungus of the genus Purpureocillium sp. belonging to the mycotheque of the Laboratory of Plant Protection of UFRA were identified. The treatments were: Metarhizium anisopliae, Trichoderma sp., Beauveria bassiana, Purpureocillium lillacinum, chemical acaricide based on abamectin, as the company's standard treatment, and water as a control treatment. The concentration used was 108 conidia/ml. The fruits treated with P. lillacinum had a lower number of mites, considering this the best treatment, however, the treatment with B. bassiana also stood out. This work provides important information about the diversity, abundance and population fluctuation of natural enemies in coconut trees and fungal species with potential to control A. guerreronis, which can be used for the establishment of natural and applied biological control programs in the Brazilian Amazon . 

 

BANKING MEMBERS:
Interna - 2494920 - ANTONIA BENEDITA DA SILVA BRONZE
Externo à Instituição - GILSON SANCHEZ CHIA - AGROPALMA
Externo à Instituição - JOSÉ WAGNER DA SILVA MELO - UFRPE
Externo à Instituição - ORLANDO SHIGUEO OHASHI - SOCOCO
Presidente - 3266519 - TELMA FATIMA VIEIRA BATISTA