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Carvalho,Gabriel dos Santos; Silva,Luciana Barboza; Reis,Soislan Sousa; Veras,Maisa Sousa; Carneiro,Eliane; Almeida,Mayra Layra dos Santos; Silva,Alexandre Faria da; Lopes,Gleidyane Novais. |
Abstract: The objective of this work was to determine the biological parameters and thermal requirements of Trichogramma pretiosum TM strain reared on Helicoverpa armigera eggs. A card containing 20 eggs of H. armigera was offered for each T. pretiosum female, at temperatures of 18, 20, 22, 25, 28, 30 and 32°C. All life stages of T. pretiosum were observed under the given temperature conditions. The optimum temperature for the parasitism of T. pretiosum was 25°C, and the highest longevity was found at the same temperature. The highest parasitoid emergence rates occurred at temperatures of 22, 25 and 28°C. The highest proportion of T. pretiosum individuals emerged per egg was observed at 18°C. Concerning the sex ratio, the highest proportion of females... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Trichogrammatidae; Biological control; Parasitoid; Temperature. |
Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001100961 |
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Silva,Luciana Barboza; Silva,Walciane; Macedo,Maria Ligia Rodrigues; Peres,Marize Terezinha Lopes Pereira. |
Hundreds of plant species have been studied in order to find out the active ingredient responsible for their insecticidal activity against the pests of economic importance. To verify the insecticidal activity in the husk of stem of Croton urucurana Baillon 1864 (Euphorbiaceae) against Anagasta kuehniella Zeller 1879 (Lepidoptera: Pyralidae), the methanolic (EMeOH) extract, dichloromethane fraction (FDM), ethyl acetate fraction (FAE) and crude resin, incorporated into an artificial diet were evaluated. EMeOH (0.5, 1.0 and 2.0%) and crude resin (2.0%) interfered with neither the weight nor the survival of fourth instar larvae and other analyzed parameters. FDM (2.0%) fraction caused mortality of 65%, and the artificial diet containing 2.0, 1.0 and 0.5% FAE... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphorbiaceae; Insecticide; 'sangra d'água'; Meal moth; Toxicity. |
Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300018 |
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