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21 December 2020 Rosmarinus officinialis L. (Lamiales: Lamiaceae), a Promising Repellent Plant for Thrips Management
Xiao-Wei Li, Zhi-Jun Zhang, Muhammad Hafeez, Jun Huang, Jin-Ming Zhang, Li-Kun Wang, Yao-Bin Lu
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Abstract

A number of thrips species are among the most significant agricultural pests globally. Use of repellent intercrop plants is one of the key components in plant-based ‘push–pull' strategies to manage pest populations. In this study, the behavioral responses of three thrips species, Frankliniella occidentalis (Pergande), Frankliniella intonsa (Trybom), and Thrips palmi Karny (Thysanoptera: Thripidae) to Rosmarinus officinalis were investigated in Y-tube olfactometer bioassays and cage experiments. In addition, the major volatile compounds from rosemary were identified and the effect of the individual compounds on thrips behavior was evaluated. Females and males of the three thrips species were significantly repelled by the volatiles from cut rosemary leaves. The presence of rosemary plants significantly reduced settlement of females of the three thrips species and eggs laid by F. occidentalis females on target host plants. In total, 47 compounds were identified in the volatiles collected from the cut leaves of rosemary plants. The responses of the three thrips species to 10 major volatile compounds showed significant differences. However, α-pinene, the most abundant volatile, was repellent to F. occidentalis and F. intonsa. Eucalyptol, the second most abundant volatile, showed significant repellent activity to all the three thrips species. Our findings showed that rosemary is a promising repellent plant against the three thrips pests we tested, which could be a good candidate for ‘push' plants in plant-based ‘push–pull’ strategies. The identified volatile compounds that accounted for the repellent activity could be developed as repellents for sustainable thrips management.

© The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.
Xiao-Wei Li, Zhi-Jun Zhang, Muhammad Hafeez, Jun Huang, Jin-Ming Zhang, Li-Kun Wang, and Yao-Bin Lu "Rosmarinus officinialis L. (Lamiales: Lamiaceae), a Promising Repellent Plant for Thrips Management," Journal of Economic Entomology 114(1), 131-141, (21 December 2020). https://doi.org/10.1093/jee/toaa288
Received: 25 September 2020; Accepted: 13 November 2020; Published: 21 December 2020
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KEYWORDS
host selection
olfactometer
Rosmarinus officinalis
thrips
volatile compounds
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