Biopesticides
Mostrando 1-12 de 18 artigos, teses e dissertações.
-
1. Molecular characterization of Bacillus thuringiensis strains to control Spodoptera eridania (Cramer) (Lepidoptera: Noctuidae) population
Abstract The main objective of this study was to characterize the toxicity and genetic divergence of 18 Bacillus thuringiensis strains in the biological control of Spodoptera eridania. Bacterial suspensions were added to the S. eridania diet. Half of the selected B. thuringiensis strains caused high mortality seven days after infection. The genetic divergenc
Rev. Bras. entomol.. Publicado em: 17/01/2020
-
2. Conyza canadensis: Green Extraction Method of Bioactive Compounds and Evaluation of Their Antifungal Activity
Synthetic fungicides are a common treatment for post-harvest diseases in fruits, although demand is increasing for alternatives such as biopesticides. The aim of this work was to investigate the presence of naturally occurring antifungal compounds in Brazilian specimens of the weed Conyza canadensis. Two compounds [(4Z)-lachnophyllum lactone and (4Z,8Z)-matr
J. Braz. Chem. Soc.. Publicado em: 2017-05
-
3. Laboratory evaluation of Clusia fluminensis extracts and their isolated compounds against Dysdercus peruvianus and Oncopeltus fasciatus
ABSTRACT The effects of the hexanic extracts of the fruits and flowers of Clusia fluminensis Planch. & Triana, Clusiaceae, as well as their main constituents, the triterpene lanosterol and the benzophenone clusianone, were evaluated on hemipterans Dysdercus peruvianus and Oncopeltus fasciatus. The topical treatments of insects with the hexanic extracts signi
Rev. bras. farmacogn.. Publicado em: 2017-02
-
4. Commercial Biological Control Agents Targeted Against Plant-Parasitic Root-knot Nematodes
Root-knot nematodes are microscopic round worms, which cause severe agricultural losses. Their attacks affect the productivity by reducing the amount and the caliber of the fruits. Chemical control is widely used, but biological control appears to be a better solution, mainly using microorganisms to reduce the quantity of pests infecting crops. Biological co
Braz. arch. biol. technol.. Publicado em: 2014-12
-
5. Effects of UV-B radiation on Lecanicillium spp., biological control agents of the coffee leaf rust pathogen
Coffee leaf rust is the main disease of coffee and its causal agent is naturally hyperparasited by Lecanicillium lecanii, indicating its potential for biocontrol. Ultraviolet-B (UV-B) radiation is an important factor that interferes on application of biocontrol agents, and Lecanicillium can be affected by UV-B. The objective of this work was to evaluate the
Trop. plant pathol.. Publicado em: 2014-10
-
6. A Química na agricultura: perspectivas para o desenvolvimento de tecnologias sustentáveis
Food production and preservation of the environment are among the challenges faced by contemporary society. In Brazil, as in most parts of the world, the possibility of increasing the agricultural area is limited by several factors. Thus, an increase in productivity through the application of innovative technologies is regarded as the best solution to overco
Quím. Nova. Publicado em: 2013
-
7. Seleção e caracterização de estirpes de Bacillus thuringiensis efetivas no controle da traça-das-crucíferas Plutella xylostella.
O objetivo deste trabalho foi selecionar e caracterizar, no Banco de Germoplasma de Bacillus spp., da Empresa Brasileira de Pesquisa Agropecuária, as estirpes de Bacillus thuringiensis mais tóxicas à Plutella xylostella, por métodos morfológicos, bioquímicos e moleculares. Das 203 estirpes testadas, sete causaram 100% de mortalidade e foram semelhantes
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
8. Estirpes de Bacillus thuringiensis efetivas contra insetos das ordens Lepidoptera, Coleoptera e Diptera.
O objetivo deste trabalho foi selecionar entre 300 estirpes de Bacillus thuringiensis as efetivas simultaneamente contra larvas de Spodoptera frugiperda J.E. Smith e Anticarsia gemmatalis Hübner (Lepidoptera: Noctuidae), Anthonomus grandis Boheman (Coleoptera: Curculionidae), Aedes aegypti Linnaeus e Culex quinquefasciatus Say (Diptera: Culicidae). Foram se
Pesquisa Agropecuária Brasileira. Publicado em: 2011
-
9. Development of insect resistance to biopesticides.
A resistencia a uma serie de diferentes microrganismos tem sido comprovada em grupos de insetos selvagens e foi deliberadamente induzida em populacoes de laboratorio e insetos domesticados. Nos ultimos anos, o rapido progresso na introducao de genes de toxinas de bacilos inseticidas em culturas agricolas aumentou a preocupação de que a resistencia a bacter
Pesquisa Agropecuaria Brasileira. Publicado em: 2011
-
10. Identificação molecular e caracterização estrutural de ciclotídeo de palicourea rígida com potencial inseticida
Over the years, there have been several discoveries of peptides containing a cyclic structural fold. Among these molecules the cyclotides family was reported, being composed of small cyclic peptides containing 6 (six) conserved cysteine residues, connected by disulfide bonds forming a cysteine binding cyclic structure also known as "Cyclic Cysteine Knot" (CC
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/11/2010
-
11. Controle biolÃgico e alternativo da cochonilha (Phenacoccus manihoti Matile-Ferrero) na cultura da mandioca (Manihot esculenta Crantz) / Biological control and alternative mealybug (Phenacoccus manihoti Matile-Ferrero) in cassava crop (Manihot esculenta Crantz)
This study aimed to evaluate the action of entomopathogenic fungi and plant protection products used in alternative agroecological on nymphs of P. manihoti in cassava. The four upper leaves of cassava plants infested with nymphs of the mealybug P. manihoti application of treatments received in the lower surface of leaves on the nymphs, using a spray nozzle a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
-
12. Estratégias de Produção in vitro de Bioinseticida Viral: influências do Isolado, da Cinética e do Modo de operação
Societal concerns about environmental sustainability has lead to the development of ecologically-friendly alternatives to chemical insecticides for crop protection. One such alternative is biological pest control. In particular, baculoviruses are well suited as insect biopesticides due to their narrow host specificity and relative ease of propagation. In Bra
Publicado em: 2010