Toxicological and behavioral effects of some plant extract on Colorado potato beetle, Leptinotarsa decemlineata Say, 1824 (Coleoptera: Chrysomelidae)
Abstract
Repellent,
ovicidal and oviposition deterrent effects of six plant extracts (Heracleum
platytaenium Boiss (Apiaceae), Humulus lupulus L. (Cannabaceae), Achillea
millefolium L. (Asteraceae), Acanthus dioscoridis L. (Acanthaceae), Phlomoides
tuberosa (L.) Moench (Lamiaceae), Bifora radians Bieb. (Apiaceae)) were tested on Leptinotarsa
decemlineata Say, 1824 (Coleoptera: Chrysomelidae) under laboratory
conditions. Methanol extracts prepared from plant vegetative components were
tested on L. decemlineata. Heracleum platytaenium extract was
significantly more toxic against the egg stage than all other extracts, except
for A. millefolium 5 d after treatment. It was followed by A.
millefolium extract reducing the egg hatch rate to 15%. Significant
mortality was not observed in the case of other plant extracts. In the second
series of experiments, different dose-response bioassays with H. platytaenium
against L. decemlineata eggs were conducted. The lowest egg hatch rate
of 1% was observed at 7.5% [w/v (plant extract/acetone]. The greatest
oviposition deterrent effect was seen with the H. platytaenium extract
treatment, which resulted in no egg laying. Plant extracts showed a high level
of repellent activity to L. decemlineata and their activity increased
with extended incubation time. The greatest repellency was observed with the A.
millefolium extract treatment, which gave 0.01% repellency in the first 15
min. These results show that H. platytaenium extract could be a useful
toll in the control of L. decemlineata.
Keywords
References
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Details
Primary Language
English
Subjects
-
Journal Section
Research Article
Publication Date
October 17, 2017
Submission Date
March 20, 2017
Acceptance Date
September 20, 2017
Published in Issue
Year 2017 Volume: 41 Number: 3
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