Banca de QUALIFICAÇÃO: KRISLEY SEIBEL TONDIM

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : KRISLEY SEIBEL TONDIM
DATA : 09/12/2020
HORA: 14:00
LOCAL: meet.google.com/xds-unwx-ywk
TÍTULO:

TOXICITY OF ESSENTIAL OILS FROM PLANTS OF THE PIPERACEAE FAMILY IN STINKBUG EGGS Euschistus heros (F.) AND SURVEY OF THE USE OF PHYTOINSECTICIDES BY SOY PRODUCERS IN MATO GROSSO

PALAVRAS-CHAVES:

Stink bug, Bioprospecting, Biological Control, botanical insecticide

PÁGINAS: 40
GRANDE ÁREA: Ciências Biológicas
ÁREA: Zoologia
SUBÁREA: Zoologia Aplicada
ESPECIALIDADE: Controle Populacional de Animais
RESUMO:

Soy is an oilseed with numerous consumption purposes, and it can be used to make bran, oil, milk, cheese, among others, becoming one of the main groceries of Brazilian families because it is directly linked to the country's economy, generating new jobs and providing food for the population. However, the expansion of the culture of this grain in Brazil led to the increase of several pests, with emphasis on the brown stink bug, Euschistus heros. This insect, in turn, poses risks to crops as it affects the crop at various stages of development, compromising mainly the formation of pods, which generates losses of up to 30% in the productive capacity or even in the progress of the seeds. Based on this problem, the objective of this study was to study three main points: 1) to expose the importance of using phytoinsecticides based on plants of the Piperaceae family as a possible alternative for the control of the brown stink bug; and 2) conduct interviews with soy producers seeking to gather information about the knowledge and use of phytoinsecticides by farmers in Mato Grosso. For this, the research was carried out in the laboratories of the Center for Research, Studies and Agri-Environmental Development (CPEDA) of the State University of Mato Grosso (UNEMAT), Professor Eugênio Carlos Stieler University Campus, and also in partnership with Laboratories of the Federal University of Paraná (UFPR). The experiments were carried out with essential oils obtained from the leaves of three species of Piperaceae (Piper hispidum Sw., Piper marginatum L. and Piper aff. divaricatum G. Mey.). The leaves were dried in a forced-air fl ow oven at 40 ° C and ground to a low particle size. In order to obtain essential oils, the vegetable material obtained was extracted by hydrodistillation and dragged by steam using the Clevenger apparatus for 4 hours. For the insecticidal bioassays, the eggs of the stink bug E. heros from creations established in the laboratory were used. Five different concentrations of essential oils from the three species of Piper (0.25%, 0.5%, 1.0%, 2.0% and 4.0%) were tested and two control treatments (one with water and the other only with the solvent - acetone) on pest eggs. All tests were maintained in a BOD air-conditioned chamber, at 25 ± 1 ° C, 14-hour photophase and 70% RH. It was observed that the three species studied had insecticidal effects on stinkbug eggs. Piper marginatum stood out among the plants studied, as it caused high infeasibility on pest eggs. To survey the knowledge, use and acceptance of biological products by soybean producers, semi-structured forms were applied.

MEMBROS DA BANCA:
Presidente - 136121002 - ALESSANDRA REGINA BUTNARIU
Interno - 101366004 - MONICA JOSENE BARBOSA PEREIRA
Externo à Instituição - MICHELE TROMBIN DE SOUZA - UFPel