Bioefficacy of compounds from Dittrichia viscosa (Asteraceae) as protectant of chickpea seeds against the cowpea seed beetle Callosobruchus maculatus (Coleoptera: Chrysomelidae)

• Published in: Journal of plant diseases and protection (2006) Vol. 126; no. 5; pp. 437 - 446
• Main Authors: Gueribis, Faiza, Zermane, Nadjia, Khalfi-Habess, Ouassila, Siafa, Abderrahmane, Cimmino, Alessio, Boari, Angela, Evidente, Antonio
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Verlag Eugen Ulmer KG 01.10.2019; Springer Berlin Heidelberg
• Subjects: Biomedical and Life Sciences; Life Sciences; ORIGINAL ARTICLE; Plant Pathology; Plant Physiology; Plant Sciences; Inuloxins; Sesquiterpenoids; α-Costic acid; Chemosterilant
• ISSN: 1861-3829; 1861-3837
• DOI: 10.1007/s41348-019-00240-w

The efficacy of four bi-and tri-cyclic sesquiterpenes, namely inuloxins A, B and C and a-costic acid, extracted from aerial parts of Dittrichia viscosa collected in Algeria was assessed against the cowpea seed beetle Callosobruchus maculatus. The compounds were evaluated for their effect on adult mortality, oviposition and adult emergence. Three concentrations (100, 50 and 25 µg/ml) of each compound were tested with chickpea being used as the test plant. Complete adult mortality (100%) was achieved at only 1 day after exposure to inuloxins B and C and α-costic acid with LC₅₀s less than 36 µg/ml. Lethal concentration values (LC₅₀) were determined as 30.4, 35.2, 31.6 and 29.4 µg/ml, respectively, for inuloxins A, B and C and a-costic acid. Oviposition and F1 progeny emergence were significantly reduced (27% and 73%, respectively) after treatment with D. viscosa compounds. Our results also revealed that oviposition, adult emergence and sex ratio varied with the sex of the treated mating partner suggesting that the test compounds may have acted as male (or indirect female) chemosterilants resulting in reduced fecundity and fertility of untreated females that mated with treated males.