Behavioural responses of western flower thrips (<i>Frankliniella occidentalis</i>(pergande)) to extract from meadow-sweet (<i>filipendula ulmaria</i>maxim.): Laboratory and field bioassays

Hoffmann

Riefler

2007

J Applied Entomology

This study investigates behavioural responses of adult western flower thrips (Frankliniella occidentalis Pergande; Thysan., Thripidae) females to direct contact with repellent phenylpropanoid plant compounds (salicylaldehyde and methyl salicylate) applied on bean and cucumber leaves. The residence time of F. occidentalis females until take off was significantly shorter on bean or cucumber leaf discs treated with salicylaldehyde at 1% concentration compared with control leaf discs. A methyl salicylate (1%) treatment of cucumber resulted in shorter time periods until thrips took off the treated leaf discs compared with the control leaf discs. In a choice experiment thrips avoided to settle on a 1% salicylaldehyde treatment of bean and cucumber leaf discs for a maximum of 3 h, on a 1% methyl salicylate treatment for a 5-h period. Within a 24-h period neither the egg-laying nor the feeding activity of F. occidentalis was affected after salicylaldehyde application (0.1%, 1%) on bean or cucumber. In contrast, methyl salicylate (1%) applied on bean and cucumber significantly prevented thrips females from oviposition and reduced the percentage of damaged area caused by their feeding activity for 24 h. As olfactory repellent plant volatiles applied on crop plants may elicit diverse post-landing responses of F. occidentalis, short-and long-term effects should be considered when evaluating the factual applicability of secondary plant compounds in a successful thrips management strategy.

Section: Introductionmentioning

confidence: 99%

Influence of salicylaldehyde and methyl salicylate on post‐landing behaviour of Frankliniella occidentalis Pergande

Hoffmann

Riefler

2007

J Applied Entomology

“…Linalool occurs in the floral scent of lavender (Knudsen et al., ) and is an olfactory attractant to F. occidentalis (Koschier et al., ). Dosage‐dependent attraction or repellence of F. occidentalis at close range has been previously observed with plant extracts as well as pure chemical compounds in olfactometer experiments (e.g., Pow et al., ; Koschier et al., ; Shamshev et al., ; Davidson et al., ). Nonetheless, with plant odour bouquets consisting of various volatile components, another explanation for our findings could be that the presence of other compounds in the odours emanating from clove basil or lavender plants might have masked the attractiveness of eugenol or linalool to F. occidentalis .…”

Section: Discussionmentioning

confidence: 61%

The effect of background plant odours on the behavioural responses of Frankliniella occidentalis to attractive or repellent compounds in a Y‐tube olfactometer

Entomologia Exp Applicata

Nielsen

Spangl

et al. 2017

The western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), causes major losses in agricultural and horticultural crops worldwide. The volatile compounds methyl isonicotinate, p‐anisaldehyde, eugenol, and linalool are known as olfactory attractants, and salicylaldehyde is known as a repellent for F. occidentalis under clean‐air conditions in laboratory experiments. In the present study we assessed the responses of F. occidentalis to these compounds when presented alone, in combination, and in the presence of background odours emanating from cucumber (Cucumis sativus L., Cucurbitaceae), capsicum (Capiscum anuum L., Solanaceae), chrysanthemum (Chrysanthemum morifolium Ramat., Asteraceae), clove basil (Ocimum gratissimum L.), and lavender (Lavandula angustifolia L., both Lamiaceae) plants in a Y‐tube olfactometer. In the presence of any background plant odour, the attractiveness of pure methyl isonicotinate to F. occidentalis proved to be consistently significant. Compared to clean‐air conditions, a slightly lower percentage of thrips chose the Y‐tube arm loaded with 10% p‐anisaldehyde in the presence of cucumber leaf odour. With non‐flowering clove basil plants in the background, F. occidentalis responses to 1% eugenol, a constituent of clove basil essential oil, were neutral, and the same applied to responses to pure linalool, a constituent of lavender essential oil, in the presence of flowering lavender plants. Also, thrips responses to pure or diluted salicylaldehyde were clearly influenced by plant background odours. We simulated a push‐pull situation and found a trend indicating that the percentage of F. occidentalis choosing the airflow loaded with the attractant methyl isonicotinate was higher when the airflow in the other arm of the Y‐tube was loaded with the repellent salicylaldehyde compared to clean air, and vice versa. We showed interactions between attractive or repellent volatile compounds and the environmental odours in the chemical ecology of F. occidentalis and the potential of a combined use of these compounds in thrips pest management.

“…Thrips responses to short range olfactory stimuli emanating from either basic plant material or pure chemical compounds were also tested in various olfactometer set-ups [for example , 13,14,21,28], flight chambers or wind tunnels [14,16,17,[30][31][32] in the laboratory. Responses of flying thrips to volatile compounds at longer ranges were examined in greenhouse and/or field experiments, trials also needed for confirming laboratory findings on attractants.…”

Section: Researching Thrips Attractantsmentioning

confidence: 99%

“…The attractiveness of Verbena x hybrida flowers to the western flower thrips, F. occidentalis, could be attributed specifically to (3S,6S)-tetrahydro-2,2,6-trimethyl-6-vinyl-2Hpyran-3-ol, a diastereo-isomer of linalool oxide [23,39], and the same thrips species proved to be attracted to Filipendula ulmaria Maxim. flowers [14], presumably because their floral odour contains 1,8-cineole (eucalyptol) [24]. In some cases, thrips responses to phytochemicals were observed rather by chance: In trapping experiments with beetles it was noticed that the traps baited with methyl anthranilate attracted thrips [40].…”

Section: Essential Oils Attractive To Thripsmentioning

confidence: 99%

“…Depending on their degree of specialization, thrips´ host plant preferences and even preferences for specific plant parts vary strongly from species to species: For instance, the generalist flowerinhabiting thrips species F. occidentalis is attracted to many different flowers, ranging from sweet pepper Capiscum annuum L. [13] and meadowsweet Filipendula ulmaria Maxim. [14] to yellow pot chrysanthemum Dendranthema x grandiflorum [15,16] and white gardenia Gardenia augusta L. [17] flowers. In contrast, the cereal thrips species Limothrips cerealium Haliday and Haplothrips aculeatus Fabricius are strongly attracted by the odour of spikelets of cereals, which are those plant parts they preferably live in, but not by the odours of whole plants or leaf sheaths [18].…”

Section: Plant Volatiles Attract Thripsmentioning

confidence: 99%

See 1 more Smart Citation

Essential Oil Compounds for Thrips Control – a Review

Natural Product Communications

2008

This review covers aspects of putting essential oil compounds to use either as allelochemicals that manipulate the host selection process of Thysanopteran pest species or as botanical insecticides that kill these pests. Thysanoptera (thrips) make an especially interesting case study in this field, because their increasing economic impact puts some urgency on the development of novel control strategies, especially strategies that incorporate natural compounds. Known facts about the host selection behaviour of thrips are briefly summarized, and methods for the evaluation of thrips responses to volatile and non-volatile plant compounds are outlined. Recent results on the search for attractive and repellent volatiles and for feeding and/or oviposition deterrent essential oil compounds are listed in detail and their potential for use in control strategies against thrips pests is discussed. An overview of plant essential oils used either for insecticidal spraying treatments of crops or for fumigation of crops in greenhouses or fumigation chambers completes the picture of bioactivities. Finally, an outlook on the perspectives for future control strategies against thrips pests is given, including thoughts on the direction of further research needed to fully evaluate the thrips control potential of plant essential oils.