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| Goussain,Marcio M.; Prado,Ernesto; Moraes,Jair C.. |
| The effect of silicon-treated wheat plants (Triticum aestivum L.) on the greenbug, Schizaphis graminum (Rond.) (Hemiptera: Aphididae) was evaluated. Plants were treated with silicon incorporated to the soil and by foliar spraying. Aphid development was evaluated by observing the duration of the pre-reproductive, reproductive and post-reproductive periods, as well as fecundity and longevity. Probing behaviour was investigated by using the DC electrical penetration graphs (EPG) technique and a "honeydew clock". Silica treated plants had a clear adverse effect on aphid development. Stylet penetration was not affected by treatments showing no physical barriers by the plant tissue. However, stylet was withdrawn more often on plants treated with silica,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Insecta; Resistance; Honeydew; Biology; EPG. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2005000500013 |
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| Morandi Filho,Wilson J.; Pacheco-da-Silva,Vitor C.; Willink,Maria C. Granara de; Prado,Ernesto; Botton,Marcos. |
| ABSTRACTMealybugs (Hemiptera: Pseudococcidae) are important pests of the grapevine Vitis spp. and are responsible for direct and indirect damage to production. The main mealybug species present in wine grapevine (Vitis vinifera L.) in Southern Brazil were identified and their incidence evaluated. Bunch-samples (n = 50) from 131 vineyards located in the Serra Gaúcha Region (RS) of Brazil were analyzed at harvest, and the occurrence of mealybugs in the roots was evaluated at the time of eradication of plants for replanting. Mealybugs were reared in laboratory until adulthood for species determination. The species Dysmicoccus brevipes (Cockerell, 1983), Dysmicoccus sp., Planococcus citri (Risso, 1813), Pl. minor(Maskell, 1897), Pseudococcus viburni (Signoret,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dysmicoccus; Planococcus; Pseudococcus; Scale insects; Vitis spp. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262015000300251 |
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| Sousa,Ana Luiza Viana de; Souza,Brígida; Santa-Cecília,Lenira Viana Costa; Prado,Ernesto. |
| O objetivo deste trabalho foi detectar uma possível especificidade alimentar de duas espécies crípticas de cochonilhas do gênero Planococcus, refletida em seu desenvolvimento em frutos de cacaueiro, cafeeiro e citros. A cochonilha Planococcus minor (Maskell), obtida de frutos de cacau (Theobroma cacao L. cv. Comum), e Planococcus citri (Risso), de lavoura de café (Coffea arabica L. cv. Mundo Novo) e de mudas de citros (Citrus sinensis L. Osbeck cv. Bahia), foram criadas em abóboras (Cucurbita maxima L.), em laboratório. Rosetas com frutos de café foram mantidas sobre uma lâmina de 5 mm de ágar-água em placas de Petri, vedadas com filme plástico de polietileno. Em frutos de citros e cacau foram utilizadas gaiolas plásticas cilíndricas (1,5 cm x 3,0 cm),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Planococcus citri; Planococcus minor; Especificidade hospedeira; Biologia. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452012000300013 |
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