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}
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Nanotecnologia promete combater mosca-branca no tomateiro e reduzir 90% das aplicações 2w3t3n
Agronegócio 29i2b Nanotecnologia promete combater mosca-branca no tomateiro e reduzir 90% das aplicações 2w3t3n Publicado
3 meses ago on
16/03/2025
Foto: Pixabay Cultura das mais sensíveis, o tomate cresceu mais de 70% em valor de produção desde 2018, também impulsionado por aumento nos índices de exportação.
No entanto, quem produz o fruto sabe: a mosca-branca (Bemisia tabaci) tem o potencial de danificar toda uma lavoura, causando o enfraquecimento das plantas.
A incidência do inseto é tamanha que, para combatê-lo, até 30% do custo de produção do tomateiro é voltado a pesticidas, conforme estudo da Bayer.
Pensando nisso, pesquisadores parceiros* do Instituto Nacional de Ciência e Tecnologia em Nanotecnologia para Agricultura Sustentável (INCT NanoAgro) em colaboração com cientistas** dos Estados Unidos desenvolveram uma solução biodegradável baseada em nanotecnologia que potencializa a ação de defensivos contra a mosca-branca.
Aplicação no tomateiro 58311a A solução consiste em um nanocarreador de proteína zeína biodegradável com o ingrediente ativo ciantraniliprol (CNAP), utilizado comercialmente para o controle de Bemisia tabaci em plantas de tomate.
Assim, ao combinar a zeína ao CNAP e pulverizar os tomateiros, os cientistas identificaram que a utilização do nanocarregador zeína, em uma dose que representa 1/10 do que comumente é utilizado para pulverizar as plantas, proporciona maior mortalidade de insetos em comparação à dose completa do produto disponibilizado comercialmente sem nanotecnologia.
Segundo o coordenador do INCT NanoAgro, Leonardo Fracetto, o ingrediente ativo ciantraniliprol foi selecionado para integrar a pesquisa devido a seu uso e eficácia generalizados, assim como a escolha da zeína deriva de estudos anteriores que demonstraram o potencial de controle aprimorado de nanoformulações à base da proteína em insetos
“O nanoinseticida desenvolvido com base na plataforma zeína e no ingrediente ativo CNAP tem potencial significativo para controlar B. tabaci em doses reduzidas e pode ser considerado seguro para plantas de tomate”, ressalta.
Segundo ele, este trabalho se soma a um crescente corpo de evidências que demonstram o potencial de carreadores em nanoescala para reduzir significativamente a carga ambiental associada ao uso de agroquímicos, mantendo, ao mesmo tempo, eficácia equivalente às estratégias convencionais.
Redução do uso de inseticidas 321y63 Foto: Ministério da Agricultura A nanoplataforma desenvolvida permitiu reduzir a dose necessária do inseticida Ciantraniliprole sem perder a eficácia no controle da mosca-branca.
Fracetto considera que, no futuro, essa tecnologia poderá ser adaptada para outros inseticidas e até para produtos naturais que, atualmente, não são viáveis comercialmente pela falta de formulações eficazes para uso comercial, entre outros entraves.
De acordo com ele, ainda não há previsão para lançamento comercial do produto comercial. “É um processo que, dentre várias etapas, depende de processo regulatório. Até o momento, temos a prova de conceito sobre a eficácia e a partir disso, temos uma melhor compreensão da dinâmica do funcionamento das nanoformulações combinadas com inseticidas no controle da mosca branca, o que está servindo de base para novas formulações ainda mais eficazes”, ressalta.
Por enquanto, os testes com a nanoplataforma foram realizados apenas em tomateiros, mas o grupo de pesquisas pretende, futuramente, fazer validações em outras culturas.
*Pesquisadores parceiros do INCT NanoAgro que participaram do estudo: Felipe Franco Oliveira, Vanessa Takeshita, Jhones Luiz Oliveira, Anderson Espírito Santo Pereira, Leonardo Fernandes Fraceto e Jorge Alberto Marques Rezende.
**Cientistas dos Estados Unidos: Núbia Zuverza-Mena, Juliana Milagres, Carlos Tamez, Washington Luiz da Silva, Christian O. Dimkpa e Jason C. White.
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