Cotton Pests
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Adaptabilidade de híbridos entre Gossypium barbadense E G. hirsutum N contendo o gene cry1Ac
Hybrids among transgenic plants and related species are expected to occur if they are sympatric and when there are not crossing barriers; as is the case, in Brazil, of cry1Ac transgenic cotton and Gossypium barbadense. This species has been maintained as dooryard plants, and should be preserved as a genetic resource. Hybrids were evaluated about traits relat
Publicado em: 2009
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14. AvaliaÃÃo da toxicidade de inseticidas utilizados em algodoeiro para cycloneda sanguinea (Linnaeus, 1763) (Coleoptera: Coccinellidae). / Toxicity evaluation of insecticides used in cotton crop to Cycloneda sanguinea (Linnaeus, 1763) (Coleoptera: Coccinellidae).
To assess the effects of three insecticides used in cotton crop on third-Ãnstar larvae and adults of the ladybeetle Cycloneda sanguinea (Linnaeus), four trials were conducted under greenhouse conditions. For the accomplishment of the tests, the cultivar BRS IPÃ, with twenty five days, were used and the insecticides were sprayed with a manual sprayer. After
Publicado em: 2009
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15. Estudo da atividade de proteínas Cry, derivadas de bacilos thuringiensis ativas para insetos-praga do algodoeiro
Cry toxins from Bacillus thuringiensis (Bt) are isecticidal proteins used for insect control. They actin by ingetion and are activated by host proteases and interact with specific receptors located on the host cell surface, resulting in midgut epithelial cells lysis. This work is divided in four chapters. In the first, a review was done o Bacillus, ecology a
Publicado em: 2009
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16. Distribuição Espacial de Insetos em Algodoeiro Bt e não-Bt / Spatial Distribution of Alabama argillacea (Hübner) and Heliothis virescens (Fabricius) (Lepidoptera, Noctuidae) Eggs on Bt and Non-Bt Cotton
Among the several options for controlling Alabama argillacea (Hübner) and Heliothis virescens (Fabricius) larvae on the cotton crop, as insecticides spraying and biological control, the transgenic Bt-cotton has been inserted as an extremely viable alternative, however it is not known with accuracy as the transgenic plants affect the populations of organisms
Publicado em: 2008
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17. Screening of Bacillus thuringiensis strains toxic to the cotton aphid (Aphis gossypii) / Seleção de estirpes de Bacillus thuringiensis tóxicas ao pulgão do algodoeiro (Aphis gossypii)
The production of the cotton crop is growing and exposes this culture to severe attack of various pests, including the cotton aphid (Aphis gossypii). This insect has caused 44% loss to the culture of cotton, attacking the initial stages of the crop. The continuous sucking sap deforms the shoots, hampers the development of the plant and also expels a sugar se
Publicado em: 2008
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18. Seleção e caracterização de estirpes de Bacillus thuringiensis tóxicas à spodoptera eridania (Cramer), Spodoptera cosmioides (Walker) e Spodoptera frugiperda (smith) (Lepidoptera: noctuidae)
Among the pests of cultivated plants the species of the gender Spodoptera is one of the most important. Spodoptera cosmioides and Spodoptera eridania were reported as cotton (Gossypium hirsutum) and soybean pests (Glycine max), while Spodoptera frugiperda corn (Zea mays) and cotton pests. The objectives of this research were select strains of Bacillus thurin
Publicado em: 2008
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19. Ecologia do bicudo-do-algodoeiro Anthonomus grandis Boheman, 1843 (Coleoptera:Curculionidae) no Cerrado do Brasil Central
The boll weevil Anthonomus grandis Boheman, 1843 (Coleoptera: Curculionidae), one of the main pests of cotton, was introduced in Brazil in 1983. It causes the most serious damage to the crop, such as the falling of the flower buds, destruction of bolls and reduced linter production. The serious pest status of the boll weevil is mainly due to its high reprodu
Publicado em: 2007
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20. Efeito de um inibidor de proteinase serinica sobre o desenvolvimento e atividade enzimatica de Heliothis virescens (Lepidopter: Noctuidae) / Effect of a trypsin inhibitor on the development and enzymatic activity of Heliothis virescens (Lepidoptera: Noctuidae)
Proteinase inhibitor proteins (PIs) are one of the defensive chemicals produced by plants against pests and pathogens. PIs are polypeptides that are able to bind to insect midgut proteolytic enzymes, rendering them inactive by competitive inhibition. This process leads to a limitation of essential amino acids in protein synthesis, and thus, to reduction in g
Publicado em: 2007
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21. To cultivate of herbaceous cotton plant submitted to the natural infestation of plagues / Cultivares de algodoeiro herbÃceo submetidas à infestaÃÃo natural de pragas
As cultivares de algodoeiro apresentam caracterÃsticas morfolÃgicas e quÃmicas diferentes que podem influenciar a susceptibilidade Ãs pragas. Neste contexto, esse trabalho teve o objetivo de comparar a suscetibilidade das cultivares de algodoeiro herbÃceo BRS Antares, BRS 201, BRS Facual, BRS IpÃ, BRS ITA 96 BRS Sucupira, CNPA 8H, CNPA ITA 90, CNPA Pre
Publicado em: 2006
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22. Damage by Nezara viridula (linnaeus, 1758) and Piezodorus guildinii (westwood, 1837) (hemiptera: pentatomidae) in cotton bolls (Gossypium hyrsutum L.). / Danos causados por Nezara viridula (Linnaeus, 1758) e Piezodorus guildinii (Westwood, 1837) (Hemiptera: Pentatomidae) em maçãs de algodoeiro (Gossypium hyrsutum L.).
Na região Centro-Oeste do Brasil, o aparecimento de percevejos migrantes da cultura da soja como Nezara viridula (Linnaeus, 1758) e Piezodorus guildinii (Westood,1873), após o processo de colheita , em lavouras de algodão, tem aumentado o interesse dos produtores em relação ao seu controle. Este trabalho teve o objetivo de verificar os tipos de danos qu
Publicado em: 2004
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23. Intraspecific variation and population structure of the Velvetbean Caterpillar, Anticarsia gemmatalis Hübner, 1818 (Insecta: Lepidoptera: Noctuidae)
The velvetbean caterpillar (VBC), Anticarsia gemmatalis Hübner, 1818 (Insecta: Lepidoptera: Noctuidae), is one of the most important New World soybean agro-ecosystems pests, occurring from 40° N in the USA to 39° S in Argentina. Information on the migration patterns of the VBC moth may be important for managing the resistance of VBC populations to insecti
Genetics and Molecular Biology. Publicado em: 2004
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24. Environmental vulnerability analysis of the main recommended pesticides for cotton, rice, coffee, sugar cane, citrus, corn and soybean production systems / Analise da vulnerabilidade ambiental aos principais pesticidas recomendados para os sistemas de produção de algodão, arroz, café, cana-de-açucar, citros, milho e soja
The utilization of pesticides in agriculture is a necessary practice to control pests, diseases or weeds to reach an excellent index of productivity and get attend the increasing necessity of food. Some of this pesticides applied, show dangerous physical-chemical proprieties to the environmental and health human. Many times it happen because we haven?t enoug
Publicado em: 2004