Volatile Organic Compounds from Cassava Plants Confer Resistance to the Whitefly (Goeldi, 1886).

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ID: 277294
2023
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Abstract
Cassava is an essential tuber crop used to produce food, feed, and beverages. Whitefly pests, including (Goeldi, 1886) (Hemiptera: Aleyrodidae), significantly affect cassava-based agroecosystems. Plant odours have been described as potential pest management tools, and the cassava clone M Ecuador 72 has been used by breeders as an essential source of resistance. In this study, we analysed and compared the volatile compounds released by this resistant clone and a susceptible genotype, BRS Jari. Constitutive odours were collected from young plants and analysed using gas chromatography-mass spectrometry combined with chemometric tools. The resistant genotype released numerous compounds with previously described biological activity and substantial amounts of the monoterpene ()-β-ocimene. Whiteflies showed non-preferential behaviour when exposed to volatiles from the resistant genotype but not the susceptible genotype. Furthermore, pure ocimene caused non-preferential behaviour in whiteflies, indicating a role for this compound in repellence. This report provides an example of the intraspecific variation in odour emissions from cassava plants alongside information on odorants that repel whiteflies; these data can be used to devise whitefly management strategies. A better understanding of the genetic variability in cassava odour constituents and emissions under field conditions may accelerate the development of more resistant cassava varieties.
Reference Key
ribeiro2023volatileinsects Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Ribeiro, Thyago Fernando Lisboa;Oliveira, Demetrios José de Albuquerque;da Costa, João Gomes;Gutierrez, Miguel Angel Martinez;de Oliveira, Eder Jorge;Ribeiro Junior, Karlos Antonio Lisboa;Goulart, Henrique Fonseca;Riffel, Alessandro;Santana, Antonio Euzebio Goulart;
Journal Insects
Year 2023
DOI
762
URL
Keywords
terpenes euphorbiaceae manihot esculenta crantz repellence activity semiochemicals

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