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| Esteves Filho,Alberto B; Oliveira,José V de; Torres,Jorge B; Gondim Jr,Manoel G C. |
| The two spotted spider mite, Tetranychus urticae Koch, is a nontarget herbivore of Bt-cotton, but acquires and accumulates higher levels of Cry toxin than that expressed by transgenic plants. This work investigated the development and reproduction of T. urticae and of the predator Phytoseiulus macropilis Banks, during three successive generations looking for potential nontarget effect. In addition, behavioral studies on feeding preference, oviposition, and predation were carried out on Bt and non-Bt cottons. The development and reproduction of T. urticae and P. macropilis was conducted using leaf discs of Bt and non-Bt cottons. Arena containing leaf discs from both cotton types connected by a slide coverslip were also used in the behavioral studies.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Transgenic cotton; Cry1Ac; Tritrophic interaction; Nontarget arthropod. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000300005 |
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| Larson, James A.; Roberts, Roland K.; Gwathmey, C. Owen. |
| Farmers are concerned about the high cost of planting herbicide-resistant cotton with the high plant densities recommended for ultra-narrow-row cotton. This study evaluated the effects on net revenues of four herbicide-resistant technology fee policies used since 1996 by Monsanto, the technology license holder. Results indicate that changes in the technology fee policy by Monsanto have raised the cost of planting herbicide-resistant cotton. As a consequence, farmers may have an incentive to switch from ultra-narrow-row cotton to wide-row cotton and to use a lower plant density when the technology fee is tied to the seeding rate. |
| Tipo: Journal Article |
Palavras-chave: Profit; Seed cost; Technology fee; Transgenic cotton; Crop Production/Industries. |
| Ano: 2007 |
URL: http://purl.umn.edu/8640 |
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| RAMALHO,FRANCISCO S.; PACHÚ,JÉSSICA K.S.; LIRA,ALINE C.S.; MALAQUIAS,JOSÉ B.; BRITO,BÁRBARA D.S.; ZANUNCIO,JOSÉ C.; FERNANDES,FRANCISCO S.. |
| ABSTRACT The host acceptance behavior and environmental factors as temperature affect the feeding behavior of Lepidoptera pests. Thus, they must be considered in studies about the risk potential of resistance evolution. The current study sets the differences in the feeding behavior of neonate Alabama argillacea (Hübner) (Lepidoptera: Noctuidae) larvae exposed to Bt and non-Bt cotton plants, under different temperatures and time gap after hatching. Two cotton cultivars were used: the Bt (DP 404 BG - bollgard) and the non-transformed isoline, DP 4049. We found that the feeding behavior of neonate A. argillacea is significantly different between Bt and non-Bt cotton. Based on the number of larvae with vegetal tissue in their gut found on the plant and in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cotton leafworm; Feeding behavior; Transgenic cotton; Blended seed refuge. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000602955 |
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