Two terpenoids activates close mating behavior and enhances trap efficiency of sex pheromone of Grapholita molesta

Xiang, Hui; Chen, Zhen; Li, Xian Wei; Guo, Yan; li, Xian Chun; Yan, Rui

doi:10.1016/j.aspen.2019.08.003

Cited by 7 publications

(7 citation statements)

References 41 publications

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“…In the wind tunnel assay, the difference in the proportion of male moths responding between 15 component combinations and control was found to occur in the orientational flight except for zigzag flight, flight around or making contact with the attractants. The behavioral responses of tested males seem to be slightly low (none over 40%), which is consistent with previous reports (Kong et al 2020a;Xiang et al 2019). The total counts of sensilla trichodea in G. molesta vary up to 30% among individuals reared under different conditions; therefore, the different number of sensilla between studies could be related to this factor (Nagy & George 1981).…”

Section: Discussionsupporting

confidence: 90%

Male Grapholita molesta (Busck) adults responding to various component combinations of synthetic female sex pheromone

Guo

Wang

Chai

et al. 2022

Entomological Research

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Grapholita molesta (Busck) is a cosmopolitan fruit pest. The sex pheromones released by females have four components, namely (Z)-8-dodecenyl acetate (Z8-12:Ac), E8-12:Ac, (Z)-8-dodecen-1-ol (Z8-12:OH), and dodecanol (12:OH). This multichemical attractive system has been reported to induce various male behavioral responses, from arousal to directional flight, and enhance trapping. However, the specific male behaviors induced by individual component or component blend is unclear. This study investigated the effects of different combinations of these four components using electroantennogram, wind tunnel assays, and field tests on aspects of male behavioral performance. Our results showed that the (Z8-12:Ac + E8-12:Ac)containing pheromones were mainly responsible for long-distance detection and close-distance location in males, including antennal detection of the stimulus, flight initiation, directional flight, and trapping. The addition of E8-12:Ac to Z8-12:Ac plays an important role in pheromone searching behavior of males in close range. The ternary component, Z8-12:Ac + E8-12: Ac + Z8-12:OH was crucial for capturing male moths, and 12:OH significantly increased the male catch. The addition of Z8-12:OH and 12:OH to Z8-12: Ac + E8-12:Ac plays an important role in completing the whole response sequence in field attraction. This study revealed that Z8-12:Ac + E8-12:Ac acts as a attractant to males, whereas Z8-12:OH, and 12:OH are the synergists that enhance male attraction in the sex pheromone blend.

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Section: Discussionsupporting

confidence: 90%

Male Grapholita molesta (Busck) adults responding to various component combinations of synthetic female sex pheromone

Guo

Wang

Chai

et al. 2022

Entomological Research

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“…Literature offers a wide list of attractive compounds to enhance female attraction [ 35 ]; for instance, it was found that phenylacetaldehyde acts as an attractant for several lepidopteran species, and for some pests, a correlation between moth captures in traps (both males and females, thanks to the phenylacetaldehyde acting as kairomone) and subsequent damage in a cash crop was demonstrated [ 36 ]. To properly evaluate G. molesta attractiveness towards host plant VOCs (e.g., [ 10 , 11 , 12 , 13 , 14 ]), further field experiments are needed, considering several factors. First, compounds and blends simulating the host plants odor (e.g., pear or peach) can trigger a different response for G. molesta females [ 37 ]; in field experiments, for instance, total captures and female capture ratio were found to be affected by the composition and complexity of the tested blends mimicking the host plant odor [ 38 , 39 , 40 ].…”

Section: Discussionmentioning

confidence: 99%

“…In 2009, Il’ichev et al [ 12 ] demonstrated that males of G. molesta are also attracted by host plant VOCs such as ( Z )-3-hexen-1-yl acetate, ( E )-β-ocimene and ( E )-β-farnesene. More recently, a synergistic effect between kairomone and pheromone compounds has been demonstrated testing mixtures of these host plant VOCs combined with the female sex pheromone [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Improved Monitoring of Grapholita molesta (Lepidoptera: Tortricidae) in Stone Fruit Orchards with a Pheromone-Kairomone Combination Lure

Preti

Knight²,

Angeli

2020

Insects

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Monitoring oriental fruit moth Grapholita molesta Busck (Lepidoptera: Tortricidae), populations based on counts in sex pheromone-baited traps within sex pheromone-treated orchards for mating disruption (MD) is challenging since male orientation to traps is disrupted. In this study, we evaluated a new commercial pheromone–kairomone combination lure for G. molesta (Pherocon® OFM Combo™ Dual™), which combines the G. molesta and Cydia pomonella L. sex pheromones with a blend of acetic acid and terpinyl acetate. Trap comparisons were performed in 33 trials in peach and nectarine orchards under MD (24) or non-MD (9) during the 2018–2019 period in Italy. Male and total moth captures in traps baited with the combination lure were significantly greater than in traps with G. molesta pheromone in both years and across both pheromone treatments. The proportion of females in the total moth captures using the combination lure averaged ca. 7% across all trials. The by-catch of non-targets, i.e., Apis mellifera L., was low in traps baited either with the combination and the sex pheromone lure, while trap color (white) affected the capture of beneficials but not of the target pest. Our study proves that this combination lure can improve the monitoring and management for G. molesta in stone fruits. New studies are needed to define action thresholds to trigger supplemental control methods to MD. Secondly, female-based monitoring lures should be further developed to improve management strategies.

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“…Although the localization mechanism of the host plant of this species (H. grandella) is still unclear, the orientation by volatiles of the host seems to be the most likely mechanism to localize the plant (Grijpma and Gara 1970;Gara et al 1972;Grijpma 1976;Howard 1991;Prokopy and Papaj 2001). Volatiles released by the plant can stimulate females to oviposit (Grijpma 1976), or as occurs with other lepidoptera, these could synergize response to sex pheromone (Yang et al 2004;Xiang et al 2019). We are thinking performance future bioassays to evaluate the effect of the sex pheromone combined with host plant volatiles.…”

Section: Discussionmentioning

confidence: 99%

Volatiles as Attractants of Mahogany Shoot Borer, Hypsipyla grandella Zeller (Lepidoptera: Pyralidae)

et al. 2022

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The mahogany shoot borer, Hypsipyla grandella Zeller (Lepidoptera: Pyralidae), is one of the most economically important pests in all American tropical forests because it prevents the establishment of monoculture plantations of the family Meliaceae, such as Spanish cedar, Cedrela odorata L. Various studies have focussed on the bioecological aspects and the chemical and silvicultural control of this pest. However, relatively little is known about the biological interactions between this insect and its host plant. In this study, the shoot borer's behavior and attraction response to cedar host plants was evaluated in field cages. We also identified the volatiles emitted by healthy C. odorata plants that were attractive to H. grandella adults. The attraction to headspace volatiles from cedar plants and a synthetic blend were evaluated in a Y-glass tube olfactometer. We observed that virgin and mated females exhibited low activity at night, frequent movement of the antennae, sporadic flight activity, and short (< 10 s) and long (> 30 s) wing-fanning. Virgin females assumed a calling position, whereas mated females exhibited three periods of oviposition. The results showed that all evaluated categories – virgin females, virgin males, and mated females – were attracted to cedar plants. We identified the following volatile compounds: α-pinene, ( E )-β-ocimene, 2-ethyl-1-hexanol, limonene, nonanal, ( E )-4,8-dimethyl-1,3,7-nonatriene, α-copaene, β-caryophyllene, and germacrene D. A synthetic blend significantly attracted virgin male and mated female shoot borers. Our results suggested that C. odorata volatiles compounds are responsible for the attraction of H. grandella . Supplementary Information The online version contains supplementary material available at 10.1007/s10886-022-01398-8.

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Two terpenoids activates close mating behavior and enhances trap efficiency of sex pheromone of Grapholita molesta

Cited by 7 publications

References 41 publications

Male Grapholita molesta (Busck) adults responding to various component combinations of synthetic female sex pheromone

Male Grapholita molesta (Busck) adults responding to various component combinations of synthetic female sex pheromone

Improved Monitoring of Grapholita molesta (Lepidoptera: Tortricidae) in Stone Fruit Orchards with a Pheromone-Kairomone Combination Lure

Volatiles as Attractants of Mahogany Shoot Borer, Hypsipyla grandella Zeller (Lepidoptera: Pyralidae)

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