All Title Author
Keywords Abstract

Publish in OALib Journal
ISSN: 2333-9721
APC: Only $99

ViewsDownloads

Relative Articles

Efeito da alimenta o de Schizaphis graminum com genótipos de sorgo no desenvolvimento do predador Cycloneda sanguinea

Efeito da alimenta??o de Schizaphis graminum com genótipos de sorgo no desenvolvimento do predador Cycloneda sanguinea

ASPECTOS BIOLóGICOS DE Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae) BIOLOGICAL ASPECTS OF Cycloneda sanguinea (L) (COLEOPTERA, COCCINELLIDAE)

Locomotor activity of Cycloneda sanguinea (Coleoptera: Coccinellidae) exposed to volatile semiochemicals and to direct contact with the odour source Actividad locomotriz de Cycloneda sanguinea (Coleoptera: Coccinellidae) expuesta a semioquímicos volátiles y al contacto directo con la fuente de olor

Locomotor activity of Cycloneda sanguinea (Coleoptera: Coccinellidae) exposed to volatile semiochemicals and to direct contact with the odour source

C-banding and fluorescent in situ hybridization with rDNA sequences in chromosomes of Cycloneda sanguinea Linnaeus (Coleoptera, Coccinellidae)

Effect of neem seed oil aqueous solutions on survival and development of the predator Cycloneda sanguinea (L.) (Coleoptera: Coccinellidae)

Consumption of Cinara spp. (Hemiptera, Aphididae) by Cycloneda sanguinea (Linnaeus, 1763) and Hippodamia convergens Guérin-Méneville, 1842 (Coleoptera, Coccinellidae)

Comparative biology of Cycloneda sanguinea (Linnaeus, 1763) and Hippodamia convergens Guérin-Méneville, 1842 (Coleoptera, Coccinellidae) focusing on the control of Cinara spp. (Hemiptera, Aphididae)

Comparative biology of Cycloneda sanguinea (Linnaeus, 1763) and Hippodamia convergens Guérin-Méneville, 1842 (Coleoptera, Coccinellidae) focusing on the control of Cinara spp. (Hemiptera, Aphididae)

More...

Inseticidas botanicos aplicados sobre Aphis gossypii e seu predador Cycloneda sanguinea em algod?o-colorido

DOI: 10.1590/S0100-204X2011001100002

Keywords: azadirachta indica, azadirachtin, population growth, nim aqueous extract, natural insecticides, castor oil emulsion.

Full-Text   Cite this paper   Add to My Lib

Abstract:

the objective of this work was to evaluate the effects of botanical insecticides on aphis gossypii and its predator cycloneda sanguinea, in naturally colored cotton. the botanical insecticides based on azadirachtin, aqueous extract of nim seeds, and castor oil were tested at the concentrations from 0 to 2%, 0 to 2.5%, and 0 to 3%, respectively. the bioassays were performed in laboratory conditions, in a completely randomized design. aphid mortality ranged from: 64 to 100% for azadirachtin; 12 to 92% for nim aqueous extract; and 8 to 68% for castor oil. the instantaneous rate of increase reached negative values starting from concentrations of: 1.25%, for azadirachtin; 2.25%, for nim aqueous extract; and 3.0%, for castor oil emulsion. all insecticides were toxic to the first instar larvae of the predator, with mortality values from 96.7 to 100%, for azadirachtin and nim aqueous extract, and from 50 to 100% for castor oil emulsion. for the 4th instar larvae, mortalities ranged from 87.5 to 100% for azadirachtin; from 73.3 to 100% for nim aqueous extract; and from 43.3 to 100% for castor oil emulsion. the tested insecticides are promising for a. gossypii management, although they are not selective toward c. sanguinea.

Full-Text

comments powered by Disqus