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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.2023.tde-04012024-160259
Document
Author
Full name
Natália Correr Ré
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 2023
Supervisor
Committee
Fiorio, Peterson Ricardo (President)
Duft, Daniel Garbellini
Rizzo, Rodnei
Title in Portuguese
Utilização de sensores hiperespectrais na cultura da cana-de-açúcar (Saccharum officinarum L.) para fins fitossanitários
Keywords in Portuguese
Diatraea saccharalis
Espectroscopia
Sensoriamento remoto
Abstract in Portuguese
A cadeia produtiva da cana-de-açúcar tem crescido no agronegócio brasileiro impulsionada pelo aumento da demanda por energia renovável. À medida que as áreas de cultivo se expandem, surgem desafios relacionados à infestação de pragas e doenças, acarretando em perdas econômicas. Entre as principais causas desses prejuízos está a espécie Diatraea saccharalis, também conhecida por broca da cana. Com o intuito de otimizar a produção e garantir a segurança alimentar, os investimentos em melhoramento genético aumentaram nos últimos anos, especialmente com a disseminação da tecnologia Bt (Bacillus thuringiensis), responsável por reduzir custos de produção, preservar a biodiversidade nas áreas tratadas e obter resistência a insetos que são pragas nos sistemas agrícolas. Além do gene Bt, o sensoriamento remoto é uma estratégia que pode ajudar no monitoramento, controle e diagnóstico de infestações de Diatraea saccharalis nos canaviais. Dessa forma, o objetivo do trabalho foi analisar a resposta espectral das variedades de cana: CTC9003BT (geneticamente modificada), CTC4 e RB966928 em diferentes estádios fenológicos (tanto nas folhas quanto no dossel) sob condições de disponibilidade hídrica e danos da broca. Os índices extraídos dos dados hiperespectrais do dossel: NDVI (705) e MCARI possibilitaram a separação entre as parcelas mais e menos vigorosas. A influência da região red-edge se dá, principalmente, na viabilidade em detectar mudanças estruturais ou fisiológicas das plantas. Logo, as análises realizadas sob as condições descritas podem trazer indícios de vigorosidade no dossel da cultura, visto que plantas afetadas pela broca apresentam colmos danificados e, consequenteente, redução da translocação de seiva.
Title in English
Use of hyperspectral sensors in sugarcane (Saccharum officinarum L.) for phytosanitary purposes
Keywords in English
Diatraea saccharalis
Remote sensing
Spectroscopy
Abstract in English
The sugarcane production chain has been growing in Brazilian agribusiness driven by increased demand for renewable energy. As growing areas expand, challenges arise in connection with pest and disease infestation, leading to economic losses. Among the main causes of this damage is the species Diatraea saccharalis also known as the sugarcane borer. With the aim of optimizing production and guaranteeing food security, investments in genetic improvement have increased in recent years, especially with the dissemination of Bt (Bacillus thuringiensis), technology, responsible for reducing production costs, preserving biodiversity in the treated areas and obtaining resistance to insects that are pests in agricultural systems. Besides the Bt gene, remote sensing is a strategy that may help in the monitoring, control and diagnosis of infestations of Diatraea saccharalis in sugarcane plantations. Accordingly, the objetive of the work was to analyze the viability of the use of hyperspectral sensors to obtain a spectral response of the varieties of sugarcane: CTC9003BT (genetically modified), CTC4 and RB966928 at different phenological stages (both in the leaves and in the canopy) under conditions of water availability and sugar cane borer damage. The indices extracted from the hyperspectral data of the canopy: NDVI (705) and MCARI made it possible to separate the more and less vigorous plots. The influence of the red-edge region was mainly due to the viability of detecting structural or physiological changes in plants. Therefore, analyzes carried out under the conditions described may cause damage to the crop’s canopy, as plants affected by the borer have damaged stems and, consequently, reduced sap translocation.
 
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Publishing Date
2024-01-08
 
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