Chrysoperla externa OLFATIVE RESPONSE TO CASHEW TREE VOLATILES INDUCED BY Aleurodicus cocois

Authors

  • Gabriela Priscila de Sousa Maciel Federal University of Ceará
  • Wenner Vinicius Araujo Saraiva Federal University of Ceará
  • Neville Vieira Monteiro Federal University of Ceará
  • Antônio Gleidson Lopes Souza Federal University of Ceará
  • Nivia da Silva Dias-Pini Embrapa Tropical Agroindustry
  • José Wagner da Silva Melo Federal University of Ceará
  • Elenilson Godoy Alves Filho Federal University of Ceará
  • Marilene Fancelli Embrapa Cassava & Fruits
  • Tigressa Helena Soares Rodrigues Embrapa Tropical Agroindustry

Keywords:

NATURAL ENEMY, PREDATION, HERBIVORY, SEMIOCHEMICALS

Abstract

Herbivory-induced volatile organic compounds are responsible for attracting and maintaining the natural enemies of pests on crops, aiding biological control. This study aimed to evaluate the olfactory response of third instar larvae of Chrysoperla externa (Hagen, 1861) (Neuroptera: Chrysopidae) to the volatiles of three dwarf cashew clones induced by the herbivory of Aleurodicus cocois (Curtis, 1846) (Hemiptera: Aleyrodidae). The behavioral responses of the larvae were evaluated in a closed system with a Y- shaped tube olfactometer. During the bioassays double-choice tests were performed, that is, an olfactometer arm treated with constituent clones CCP 76, EMBRAPA 51 and PRO 143/7 (non-infested) was compared to an arm containing A. cocois-induced volatiles (infested plants) of the same clones. The volatile compounds emitted by the leaves of the three A. cocois infested and non-infested cashew clones were analyzed by solid phase microextraction coupled to GC-MS. Third instar larvae of C. externa were able to distinguish and select the volatile signals emitted after A. cocois infestation, regardless of the cashew clone evaluated. According to the volatile profiles of A. cocois-infested cashew clones the compounds β-caryophyllene, allo-ocimene, neo-allo-ocimene, α-copaene, γ-muurolene and δ-cadinene were significantly released by the CCP 76 clones. and PRO143, while α-fellandrene, α-terpinene, ρ-mentha-2,4 (8) - diene and germacrene were released by EMBRAPA 51. Therefore, these compounds may be involved with the attractiveness of the predator.

Published

2019-10-19

How to Cite

Maciel, G. P. de S., Saraiva, W. V. A., Monteiro, N. V., Souza, A. G. L., Dias-Pini, N. da S., Melo, J. W. da S., Alves Filho, E. G., Fancelli, M., & Rodrigues, T. H. S. (2019). Chrysoperla externa OLFATIVE RESPONSE TO CASHEW TREE VOLATILES INDUCED BY Aleurodicus cocois. Caderno Verde De Agroecologia E Desenvolvimento Sustentável, 9(5), b–32. Retrieved from https://gvaa.com.br/revista/index.php/CVADS/article/view/7169

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