Field background odour should be taken into account when formulating a pest attractant based on plant volatiles

Cai, Xiaoming; Bian, Lei; Xu, Xiu-Xiu; Luo, Zongxiu; Li, Zhaoqun; Chen, Zongmao

doi:10.1038/srep41818

Cited by 33 publications

(34 citation statements)

References 46 publications

(67 reference statements)

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“…In the present field studies we aimed to (1) improve the effectiveness of existing monitoring insect traps in strawberry and raspberry by increasing catches of both sexes of the three target species, and (2) to demonstrate that two unrelated pest species could be attracted by semiochemicals to the same trap without decreasing the total catches. The possible influence of background volatiles on trapping success (Cai et al, 2017;Knudsen et al, 2017), made it preferable to carry out experiments in the field rather than the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Combining plant volatiles and pheromones to catch two insect pests in the same trap: Examples from two berry crops

et al. 2018

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Most horticultural crops are attacked by more than one insect pest. As broad-spectrum chemical control options are becoming increasingly restricted, there is a need to develop novel control methods. Semiochemical attractants are available for three important horticultural pests, strawberry blossom weevil, Anthonomus rubi Herbst (Coleoptera: Curculionidae), European tarnished plant bug, Lygus rugulipennis Poppius (Hemiptera: Miridae) and raspberry beetle, Byturus tomentosus deGeer (Coleoptera: Byturidae). Traps targeting more than one pest species would be more practical and economical for both monitoring and mass trapping than traps for single-species. In this study we aimed to (1) improve the effectiveness of existing traps for insect pests in strawberry and raspberry crops by increasing catches of each species, and (2) test if attractants for two unrelated pest species could be combined to capture both in the same trap without decreasing the total catches. Field tests were carried out in four European countries and different combinations of semiochemicals were compared. A volatile from strawberry flowers, 1,4 dimethoxybenzene (DMB), increased the attractiveness of the aggregation pheromone to both sexes of A. rubi. The host-plant volatile, phenylacetaldehyde (PAA), increased the attraction of female L. rugulipennis to the sex pheromone, and, in strawberry, there was some evidence that adding DMB increased catches further. Traps baited with the aggregation pheromone of A. rubi, DMB, the sex pheromone of L. rugulipennis and PAA attracted both target species to the same trap with no significant difference in catches compared to those single-species traps. In raspberry, catches in traps baited with a combination of A. rubi aggregation pheromone, DMB and the commercially available lure for B. tomentosus, based on raspberry flower volatiles, were similar to those in single-species traps. In both crops the efficiency of the traps still needs improvement, but the multispecies traps are adequate for monitoring and should not lead to confusion for the user as the target species are easy to distinguish from each other.

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Section: Introductionmentioning

confidence: 99%

Combining plant volatiles and pheromones to catch two insect pests in the same trap: Examples from two berry crops

et al. 2018

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“…A typical example is the combination of a neem seed extract spray (repellent) with an attractive trap crop to protect cotton crops from Helicoverpa armigera (Hübner) and Helicoverpa punctigera (Wallengren) in Australia . Several attractants based on plant volatiles have been developed for tea leafhopper, and have been shown to be effective in field trials . If the attractant is not combined with an effective method to kill the attracted leafhoppers, it will not decrease the leafhopper density.…”

Section: Discussionmentioning

confidence: 99%

“…46 Several attractants based on plant volatiles have been developed for tea leafhopper, and have been shown to be effective in field trials. [47][48][49] If the attractant is not combined with an effective method to kill the attracted leafhoppers, it will not decrease the leafhopper density. The combination of a repellent, an attractant and a chemical insecticide or entomopathogenic fungus in plots would create a push-pull system to reduce the leafhopper population in tea plantations.…”

Section: Discussionmentioning

confidence: 99%

Primary screening and application of repellent plant volatiles to control tea leafhopper, Empoasca onukii Matsuda

Cai

Luo

Meng

et al. 2019

Pest Management Science

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BACKGROUND The tea leafhopper, Empoasca onukii Matsuda (Hemiptera: Cicadellidae), is a major pest of tea plants in China. Here, we evaluated the repellent properties of eight volatile chemicals alone and in various combinations as tools for the management of this pest in tea gardens. These chemicals were from the Alliaceae and other aromatic plants, and are known to repel various insect species. RESULTS Among the eight volatile compounds, dimethyl disulfide (DMDS), 1,8‐cineole and allyl methyl sulfide were significantly repellent towards E. onukii adults. DMDS and 1,8‐cineole were mixed to formulate a binary repellent. Under field conditions, spraying and slow‐release applications of the mixture significantly decreased the density of E. onukii adults. The repelling effect after spraying was very short, only ∼ 2 days, but the slow‐release mixture had a longer term repelling effect on E. onukii adults. High emission of the slow‐release mixture, which was achieved by increasing the number of slow‐release bottles, had a stronger repellent effect than low emission. Moreover, when the amount emitted was sufficient, the slow‐release mixture significantly decreased the number of leafhopper nymphs in a treated tea‐plant line, and significantly decreased the number of leafhopper adults and nymphs in a tea‐plant line adjacent to the treated area. CONCLUSION This study demonstrates the repellent action of a mixture of DMDS and 1,8‐cineole applied by a slow‐release method against E. onukii in a tea plantation. This mixture has potential applications in integrated pest management schemes. © 2019 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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“…In contrast to that, we need to remark that our considerations are extrapolated from a laboratory experiment, with tested insects flying in a plant odor plume within a charcoal purified air background. It remains to be known how the observed behavior will change in a natural setting, where a number of additional odor cues may intermingle in complex plumes to shape the behavior of the herbivore ( Tasin et al, 2012 ; Cai et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

The Ratio between Field Attractive and Background Volatiles Encodes Host-Plant Recognition in a Specialist Moth

Knudsen

Norli

2017

Front. Plant Sci.

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Volatiles emitted by plants convey an array of information through different trophic levels. Animals such as host-seeking herbivores encounter plumes with filaments from both host and non-host plants. While studies showed a behavioral effect of non-host plants on herbivore host location, less information is available on how a searching insect herbivore perceives and flies upwind to a host-plant odor plume within a background of non-host volatiles. We hypothesized here that herbivorous insects in search of a host-plant can discriminate plumes of host and non-host plants and that the taxonomic relatedness of the non-host have an effect on finding the host. We also predicted that the ratio between certain plant volatiles is cognized as host-plant recognition cue by a receiver herbivorous insect. To verify these hypotheses we measured the wind tunnel response of the moth Argyresthia conjugella to the host plant rowan, to non-host plants taxonomically related (Rosaceae, apple and pear) or unrelated to the host (Pinaceae, spruce) and to binary combination of host and non-host plants. Volatiles were collected from all plant combinations and delivered to the test insect via an ultrasonic sprayer as an artificial plume. While the response to the rowan as a plant was not affected by the addition of any of the non-host plants, the attraction to the corresponding sprayed headspace decreased when pear or apple but not spruce were added to rowan. A similar result was measured toward the odor exiting a jar where freshly cut plant material of apple or pear or spruce was intermixed with rowan. Dose-response gas-chromatography coupled to electroantennography revealed the presence of seven field attractive and seven background non-attractive antennally active compounds. Although the abundance of field attractive and of some background volatiles decreased in all dual combinations in comparison with rowan alone, an increased amount of the background compounds (3E)-4,8-Dimethyl-1,3,7-nonatriene ((E)-DMNT) and (Z)-3-hexenyl acetate was found in the rowan-apple and rowan-pear but not in the rowan-spruce headspace. A higher ratio between the abundance of each field attractive component and that of (E)-DMNT and (Z)-3-hexenyl acetate was measured for rowan and rowan-spruce in contrast to rowan-pear and rowan-apple headspaces. Our result suggests that the ratio between field attractive and background antennaly active volatiles encodes host-plant recognition in our study system.

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Field background odour should be taken into account when formulating a pest attractant based on plant volatiles

Cited by 33 publications

References 46 publications

Combining plant volatiles and pheromones to catch two insect pests in the same trap: Examples from two berry crops

Combining plant volatiles and pheromones to catch two insect pests in the same trap: Examples from two berry crops

Primary screening and application of repellent plant volatiles to control tea leafhopper, Empoasca onukii Matsuda

The Ratio between Field Attractive and Background Volatiles Encodes Host-Plant Recognition in a Specialist Moth

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