Banca de QUALIFICAÇÃO: DIEGO LEMOS ALVES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DIEGO LEMOS ALVES
DATE: 06/09/2022
TIME: 15:00
LOCAL: Sala A - Prédio de Solos
TITLE:

"PREVENTIVE MANAGEMENT OF ELEPHANT GRASS (Pennisetum purpureum Schum) WITH ENTOMOPATOGENIC FUNGI AIMING FOR THE CONTROL OF PASTURE SCIGARETTES"

KEY WORDS:

Entomopathogenic fungi, microbial control, growth promoters, Metarhizium anisopliae

PAGES: 30
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUMMARY:

Entomopathogenic fungi are important biocontrol agents because they cause the population reduction of several pests without causing damage to the environment, in addition to being recently attributed as growth stimulants in plants. Thus, the objective was to evaluate the effectiveness of preventive management in the culture of elephant grass (Pennisetum purpureum Schum) after the application of entomopathogenic fungi to control pasture spittlebugs, as well as the influence of these fungi as growth promoters. The bioassay was conducted in an experimental field at the Universidade Federal Rural da Amazônia – UFRA, Campus Belém. The design was in randomized blocks, with how many replications?, with the following treatments: T1 - (Elephant grass), T2 - (Elephant grass + fertilization), T3 - (Elephant grass + fertilization + Metarhizium sp.), T4 - (Elephant grass + elephant + fertilization + Isaria sp.) and T5 – (Elephanta grass + fertilization + Trichoderma asperellum mix). The fungi were inoculated at 30, 60 and 90 days of planting at a concentration of 108 conidia/ml-1. Leafhopper evaluations were performed every 30 days by selecting 1m² in each plot and counting the foam mass containing insect nymphs. For the morphological analysis of the plants and the accumulation of biomass, the following parameters were evaluated: plant height, stem diameter, number of leaves, robustness index, in addition to the fresh and dry matter of the aerial part. For the physiological variables, net photosynthesis (A), transpiration (E), stomatal conductance (gs), internal concentration of CO2 (CI) and carboxylation efficiency (A/CI) were evaluated. The data were submitted to cluster analysis, according to the degree of similarity, resulting in three groups composed as follows: group 1: (Metarhizium sp. + fertilization), (Beauveria sp. + fertilization) and (Mix of Trichoderma asperellum + fertilization ), group 2 composed by the isolated fertilization and (Isaria sp. + fertilization) and group 3 composed by the control (only the grass without inoculation and fertilization). Group 1 showed greater gain in biometric and physiological parameters. As for leafhoppers, there was a decrease in nymphs for the treatments: (isolated fertilization), (Metarhizium sp. + fertilization) and (Beauveria sp. + fertilization), the latter being the only one with a significant difference in relation to the control. Thus, entomopathogenic fungi can be viable alternatives for the preventive management of the spittlebugs of the pasture, and promoter of the growth of the plants.

BANKING MEMBERS:
Interno - 1065086 - GLEDSON LUIZ SALGADO DE CASTRO
Externa à Instituição - MARCELA CRISTIANE FERREIRA RÊGO - UEPA
Presidente - 3266519 - TELMA FATIMA VIEIRA BATISTA
Externo ao Programa - 1331235 - THIAGO CARVALHO DA SILVA