Phytochemical and Toxicological Studies of Artemisia L. (Compositae) Essential Oil against some Insect Pests

Soliman, Mahmoud M. M. (2006) Phytochemical and Toxicological Studies of Artemisia L. (Compositae) Essential Oil against some Insect Pests. Acta Phytopathologica et Entomologica Hungarica, 41 (3-4). pp. 395-406. ISSN 0238-1249

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Abstract

Artemisia herba-alba (Asso) and Artemisia monosperma (Delile) essential oils were tested against three sucking insect pests under laboratory and greenhouse conditions. These pests included Bemisia tabaci (Gennadius), Aphis gossypii (Glover) and Thrips tabaci (Lindman). Laboratory results showed that the LC50 of A. herba-alba and A. monosperma were 0.042, 0.075% for eggs and 0.074, 0.186% for immature stages of B. tabaci. Also, both oils gave a high toxicity on A. gossypii with LC50 0.023 and 0.085%. Artemisia herba-alba and A. monosperma were more toxic on T. tabaci and A. gossypii than B. tabaci in the laboratory test. In contrast T. tabaci was sensitive for both oils (LC50 0.038 and 0.011%). These oils were efficient for controlling tested insects on cucumber plants at greenhouses. This treatment caused 85.97, 82.17% reduction in the population of B. tabaci, 90.44, 87.99% for Aphis gossypii and 87.26, 84.99% for T. tabaci. Chemical analysis of A. herba-alba and A. monosperma oils detected the presence of hydrocarbon terpenes, oxygenated terpenes, hydrocarbon sesquiterpenes and oxygenated sesquiterpenes represented about 16.38%, 58.91%, 21.61%, 2.74% and 21.53%, 57.17%, 19.32%, 1.70%, of the oil content, respectively.

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