Cashew Volatiles Mediate Short-Range Location Responses in &lt;I&gt;Pseudotheraptus wayi&lt;/I&gt; (Heteroptera: Coreidae)

Egonyu, James P.; Ekesi, Sunday; Kabaru, J. M.; Irungu, LW; Torto, Baldwyn

doi:10.1603/en13233

Cited by 5 publications

(3 citation statements)

References 48 publications

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“…Most insect herbivores rely on olfactory cues from plants during at least one stage of the foraging process. Many insect species use plant-produced volatile compounds to locate and evaluate potential host plants [133] as these cues effectively transmit useful information over both short [134] and long [135] distances in a variety of environments. Olfactory cues can be general indicators of plant presence, for example the respiratory biproduct CO 2 [19], or complex blends of volatile organic compounds (VOCs) that convey detailed information about plant identity [4], nutrient content [136], defense status, or risk of predation by natural enemies [137,138].…”

Section: Olfactory Cuesmentioning

confidence: 99%

The Role of Plant-Associated Microbes in Mediating Host-Plant Selection by Insect Herbivores

Grunseich

Thompson

Aguirre

et al. 2019

Plants

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There is increasing evidence that plant-associated microorganisms play important roles in shaping interactions between plants and insect herbivores. Studies of both pathogenic and beneficial plant microbes have documented wide-ranging effects on herbivore behavior and performance. Some studies, for example, have reported enhanced insect-repellent traits or reduced performance of herbivores on microbe-associated plants, while others have documented increased herbivore attraction or performance. Insect herbivores frequently rely on plant cues during foraging and oviposition, suggesting that plant-associated microbes affecting these cues can indirectly influence herbivore preference. We review and synthesize recent literature to provide new insights into the ways pathogenic and beneficial plant-associated microbes alter visual, olfactory, and gustatory cues of plants that affect host-plant selection by insect herbivores. We discuss the underlying mechanisms, ecological implications, and future directions for studies of plant-microbial symbionts that indirectly influence herbivore behavior by altering plant traits.

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Section: Olfactory Cuesmentioning

confidence: 99%

The Role of Plant-Associated Microbes in Mediating Host-Plant Selection by Insect Herbivores

Grunseich

Thompson

Aguirre

et al. 2019

Plants

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“…These results suggest that the presence of linalool, alloocimene, and neo-allo-ocimene, whether alone or in double or triple combinations, is positively associated with attractiveness to L. sativae. This possibility is supported by Egonyu et al (2013) and Wanjiku et al (2014), who also identi ed the compounds allo-ocimene and neo-allo-ocimene in cashew leaves, and showed, using behavioural bioassays, that as mixtures these compounds are attractive to the insect-pest Pseudotheraptus wayi (Heteroptera: Coreidae) and their natural enemy Oecophylla longinoda (Latreille) (Hymenoptera: Formicidae). In addition, olfactometry studies Guohui et al (2005) have found that the isolated linalool attracted adult females of L. sativae.…”

Section: Discussionmentioning

confidence: 84%

“…Andrade et al 2016, Egonyu et al, 2013, Wanjiku et al 2014, and is present in considerable quantities in the genotypes of Citrus sp. less preferred by the psyllid Diaphorina citri, Kuwayama (Hemiptera: Psylidae)(Andrade et al 2016).…”

mentioning

confidence: 99%

Volatile and Phenolic Compounds In The Resistance of The Melon to The Vegetable Leafminer, Liriomyza Sativae Blanchard (Diptera: Agromyzidae)

Vasconcelos

Dias-Pini

Saraiva

et al. 2022

Preprint

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The aim of this study was to evaluate whether volatile compounds released by melon genotypes interfere in the attractiveness and repellency of Liriomyza sativae Blanchard (Diptera: Agromyzidae), and to characterise the phenolic compounds of melon genotypes, as well as the antibiotic action of these compounds on L. sativae. Through experiments, it was shown that the volatiles of the melon genotypes CNPH 06-1047-343, CNPH 06-1047-333 and CNPH 06-1047-341 showed little attractiveness to L. sativae, while the volatiles of the Goldex commercial hybrid were more attractive. By analysing the volatile profiles, it was possible to identify the compounds acetic acid, (Z)-3-hexen-1-ol, α-pinene, (Z)-β-ocimene, (E)-β-ocimene, linalool, allo-ocimene and neo-allo-ocimene. The CNPH 06-1047-343, CNPH 06-1047-333 and CNPH 06-1047-341 melon genotypes show resistant characteristics due to the non-preference of L. sativae because of the smaller number of volatiles and the higher concentration of acetic acid in their volatile composition. The phenolic compounds characterised were hydroxybenzoic-hexoside acid, ferulic acid and trihydroxy-octadecadienoic acid. The CNPH 06-1047-333 and CNPH 06-1047-341 melon genotypes presented, respectively, the highest and lowest levels of total phenolics, but there was no difference in the larval or pupal viability of L. sativae, indicating a lack of any relationship between total phenols and antibiotic resistance of the melon genotypes to L. sativae. In general, based on the analysis of volatile and phenolic compounds, the CNPH 06-1047-343, CNPH 06-1047-333 and CNPH 06-1047-341 genotypes are less attractive to L. sativae than the commercial hybrid genotypes (Goldex).

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Plant Volatiles Influence the African Weaver Ant-Cashew Tree Mutualism

et al. 2014

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Plant volatiles influence virtually all forms of ant-plant symbioses. However, little is known about their role in the mutualistic relationship between the African weaver ant and the cashew tree. In this study, we tested the hypothesis that cashew tree volatiles from plant parts most vulnerable to herbivory viz. inflorescence, leaves, and fruits, are attractive to weaver ants. Using behavioral assays, we show that these volatiles attract weaver ants but without significant difference in preference for any of the odors. These same plant parts are associated with extra floral nectaries (EFNs') and therefore we evaluated the possibility that the ants associate the volatiles with food rewards. We found that perception of the odors was followed by a searching response that led the ants to non-volatile sugar rewards. More importantly, we observed that weaver ants spent significantly more time around the odor when it was paired to a reward. Chemical analysis of volatiles showed that the plant parts shared similarities in chemical composition, dominated by monoterpenes and sesquiterpenes. Additionally, we evaluated the attractiveness of a synthetic blend of three ocimene isomers ((E)-β-ocimene, (Z)-β-ocimene and allo-ocimene) identified in cashew leaf odor and shown to constitute a candidate kairomone for the cashew pest Pseudotheraptus wayi. We found that the attractiveness of the blend was dose dependent, and the response of the ants was not significantly different to that established with the crude volatiles from plant tissues. These results present new and interesting possibilities for improving weaver ant performance in cashew pest management.

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Cashew Volatiles Mediate Short-Range Location Responses in <I>Pseudotheraptus wayi</I> (Heteroptera: Coreidae)

Cited by 5 publications

References 48 publications

The Role of Plant-Associated Microbes in Mediating Host-Plant Selection by Insect Herbivores

The Role of Plant-Associated Microbes in Mediating Host-Plant Selection by Insect Herbivores

Volatile and Phenolic Compounds In The Resistance of The Melon to The Vegetable Leafminer, Liriomyza Sativae Blanchard (Diptera: Agromyzidae)

Plant Volatiles Influence the African Weaver Ant-Cashew Tree Mutualism

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