Repellency of essential oils and vegetables on black aphid Aphis craccivora Koch in the bean (Phaseolus lunatus L.)

• Autor(a) principal: Avelino, Larisse Dias
• Data de Publicação: 2019
• Outros Autores: Portela, Gilson Lages Fortes, Girão Filho, José Edmir, Melo Junior, Luiz Carlos de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista Verde de Agroecologia e Desenvolvimento Sustentavel
• Texto Completo: https://www.gvaa.com.br/revista/index.php/RVADS/article/view/5981
• topic: Bioactive; Insecticides; Alternative control; Bioativos; Inseticidas; Controle alternativo

The search for plant bioinsecticides has intensified, since natural insecticides are not persistent and degrade faster than synthetic ones without leaving residues in food or in the environment. The objective of this work was to evaluate the repellent action of essential oils and vegetables in black aphid (Aphis craccivora Koch) on Fava bean (Phaseolus lunatus L.) cultivars. To perform the experiment, leaf discs were immersed for 30 seconds in a solution of 0.05% of each treatment and the control in distilled water. The leaf discs were then placed two-by-two (treated and control) into petri dishes with open-top lids in the center covered with "voil" fabric containing 1% agar-water solution, joined by a strip of paper . In the paper rectangle were placed adult adults of A. craccivora. The essential oils testede were rosemary (Rosmarinus officinalis), copaíba (Copaifera langsdorfii), mint (Mentha L.) and citronella (Cymbopogon winterianus) and three vegetable oils, pequi (Caryocar brasiliense), sunflower (Helianthus annuus) and castor bean (Ricinus communis). The collected data were recorded in the period of 48h. The number of females attracted and nymphs produced were analyzed by non-parametric test x2 (chi-square). The essential oil of C. winterianus had higher repellency and lower production of nymphs, whereas R. communis oil had no significant repellency effect, increasing the production of nymphs and the essential oils R. officinalis, C. Langsdorfii and Mentha L. and the vegetable oils C. brasiliense and H. annuus, showed a significant effect on the reduction of nymphs.