Control of Three Main Pests of Wolfberry (Lycium barbarum) by the Essential Oil of Artemisia mongolica

doi:10.16409/j.cnki.2095-039x.2022.03.023

Abstract

Abstract: This study evaluated the insecticidal activity of essential oil of Artemisia mongolica by indoor toxicity assays and field tests so that the essential oil can be used in control of pests of Lycium barbarum to ensure the product quality and safety of L. barbarum. The results showed that the essential oil of A. mongolica had a LC₅₀value of 7.82 mg/mL against aphids, a LD₅₀value of 2.89 μg/head against psyllids, and a LC₅₀value of 2.80 mg/mL against thrips, which were all lower than their counterparts of the control agent neem extract. In the essential oil, piperitone, 1-(2-methoxypropoxy) propan-2-ol and 1,8-cineole are the insecticidal active components. In this study, the essential oil from A. mongolica was prepared in β-cyclodextrin inclusion complex through response surface analysis. The efficacy of this preparation against aphids, thrips and psyllids was 75.95%, 58.81% and 32.14%, respectively, at 1 d after application of a mass concentration of 6 kg/hm², which was higher than that obtained with azadirachtin 0.3% EC. And the control by the essential oil lasted for at least 3 weeks. In this study, the encapsulation of A. mongolica oil was applied during the fruit picking period of L. barbarum, which has the potential of further developing into high-efficiency botanical pesticides.

Key words: Artemisia mongolica, Aphis gossypii, Bactericera gobica, Frankliniella occidentalis, microencapsule

CLC Number:

S476

LIU Chang, LIU Zhilong, ZHANG Rong, HUANG Wenguang, WANG Fang, QUAN Meirong. Control of Three Main Pests of Wolfberry (Lycium barbarum) by the Essential Oil of Artemisia mongolica[J]. Chinese Journal of Biological Control, 2022, 38(6): 1400-1409.

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