A weevil sex pheromone serves as an attractant for its entomopathogenic nematode predators

Rivera, Monique J.; Martini, Xavier; Khrimian, Ashot; Stelinski, Lukasz L.

doi:10.1007/s00049-017-0246-0

Cited by 12 publications

(6 citation statements)

References 32 publications

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“…Although linalool has been reported to have limited diffusion into the soil and to be highly susceptible to degradation [ 43 ], we decided to include linalool in our profile of selected compounds because it has been reported as an HIPV-causing mixed response upon EPNs in similar studies. For instance, in olfactometric bioassays using sand as a substrate, linalool was not attractive to Steinernema diaprepesi , Steinernema riobrave (Cabanillas, Poinar, and Raulston), or Heterorhabditis indica Poinar, Karunakar & David [ 44 ]. Laznik and Trdan [ 45 ] also studied the olfactometric response of EPNs toward linalool, observing that only one strain of Steinernema carpocapsae (Weiser) was attracted to this compound, while strains of Steinernema feltiae (Filipjev), Steinernema kraussei (Steiner), and Heterorhabditis bacteriophora (Poinar) were not attracted.…”

Section: Discussionmentioning

confidence: 99%

Positive Chemotaxis of the Entomopathogenic Nematode Steinernema australe (Panagrolaimorpha: Steinenematidae) towards High-Bush Blueberry (Vaccinium corymbosum) Root Volatiles

Ceballos,

Palma-Millanao,

Navarro

et al. 2023

IJMS

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The foraging behavior of the infective juveniles (IJs) of entomopathogenic nematodes (EPNs) relies on host-derived compounds, but in a tri-trophic context, herbivore-induced root volatiles act as signals enhancing the biological control of insect pests by recruiting EPNs. In southern Chile, the EPN Steinernema australe exhibits the potential to control the raspberry weevil, Aegorhinus superciliosus, a key pest of blueberry Vaccinium corymbosum. However, there is no information on the quality of the blueberry root volatile plume or the S. australe response to these chemicals as putative attractants. Here, we describe the root volatile profile of blueberries and the chemotaxis behavior of S. australe towards the volatiles identified from Vaccinium corymbosum roots, infested or uninfested with A. superciliosus larvae. Among others, we found linalool, α-terpineol, limonene, eucalyptol, 2-carene, 1-nonine, 10-undecyn-1-ol, and methyl salicylate in root volatiles and, depending on the level of the emissions, they were selected for bioassays. In the dose–response tests, S. australe was attracted to all five tested concentrations of methyl salicylate, 1-nonine, α-terpineol, and 2-carene, as well as to 100 µg mL−1 of 10-undecyn-1-ol, 0.1 and 100 µg mL−1 of linalool, and 100 µg mL−1 of limonene, whereas eucalyptol elicited no attraction or repellency. These results suggest that some volatiles released from damaged roots attract S. australe and may have implications for the biocontrol of subterranean pests.

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Section: Discussionmentioning

confidence: 99%

Positive Chemotaxis of the Entomopathogenic Nematode Steinernema australe (Panagrolaimorpha: Steinenematidae) towards High-Bush Blueberry (Vaccinium corymbosum) Root Volatiles

Ceballos,

Palma-Millanao,

Navarro

et al. 2023

IJMS

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“…In addition to the universally produced CO 2 which is attractive for IJs of all EPN species [ 129 ], many specific host-derived odorants that stimulate host-seeking behavior by IJs have been identified and shown to be differentially attractive to different EPN species [ 110 ]. Recently it was shown that Steinernema diaprepesi and H. indica were attracted not only to beetle frass, but also to the sex pheromones of their weevil host [ 130 ]. Entomopathogenic nematodes widely use root-feeding insects as hosts.…”

Section: Dispersal and Host Findingmentioning

confidence: 99%

Transmission Success of Entomopathogenic Nematodes Used in Pest Control

Labaude

Griffin

2018

Insects

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Entomopathogenic nematodes from the two genera Steinernema and Heterorhabditis are widely used as biological agents against various insect pests and represent a promising alternative to replace pesticides. Efficacy and biocontrol success can be enhanced through improved understanding of their biology and ecology. Many endogenous and environmental factors influence the survival of nematodes following application, as well as their transmission success to the target species. The aim of this paper is to give an overview of the major topics currently considered to affect transmission success of these biological control agents, including interactions with insects, plants and other members of the soil biota including conspecifics.

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“…After exiting a consumed host, EPNs in the free-living stage, referred to as the infective juvenile (IJ) stage, need to either enter a resting phase or find a suitable host to infect [3]. To locate host insects, IJs rely on cues such as insect-produced odors [4,5], CO 2 [6], and nematode-produced pheromones or kairomones [7]. These cues can be utilized individually or in combination to enhance host finding [8].…”

Section: Introductionmentioning

confidence: 99%

What Is More Important to Host-Seeking Entomopathogenic Nematodes, Innate or Learned Preference?

Gaffke,

Romero,

Alborn

2023

Agriculture

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Entomopathogenic nematodes (EPNs), small soil-dwelling non-segmented roundworms, are obligate parasites of insects and commonly used in agriculture for biological control of insect pests. For successful reproduction, EPNs must identify, move towards, and successfully infect a suitable insect host in a chemically complex soil environment. EPNs can have innate host insect preferences and can be attracted to semiochemicals associated with that host. They can also develop strong learned preferences for chemical signals associated with the presence of a host, such as herbivory-induced volatiles. We hypothesized that simultaneous manipulation of innate and learned preferences could result in increased biological control services of EPNs in agriculture. Separate cohorts of the EPN Steinernema diaprepesi were raised on two insect hosts, Galleria mellonella and Tenebrio molitor, for multiple generations until the nematodes in a dual-choice olfactometer exhibited preference for the host they were reared on. Subsequently, the two strains of nematodes were imprinted on three plant-produced terpenoids of agricultural significance: pregeijerene, β-caryophyllene, and α-pinene. After exposure to one of the plant compounds, the behavior of the EPNs was assayed in an olfactometer where the two host insects were presented with and without the plant compounds. We found that plant volatile exposure increased the infection rate of the nematodes, and some host–compound combinations proved to be attractive, but other combinations appeared to become repellent. These results indicate that learned preference is neither subordinate nor superior to innate preference, and that infection efficiency can vary with compound exposure and insect host.

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A weevil sex pheromone serves as an attractant for its entomopathogenic nematode predators

Cited by 12 publications

References 32 publications

Positive Chemotaxis of the Entomopathogenic Nematode Steinernema australe (Panagrolaimorpha: Steinenematidae) towards High-Bush Blueberry (Vaccinium corymbosum) Root Volatiles

Positive Chemotaxis of the Entomopathogenic Nematode Steinernema australe (Panagrolaimorpha: Steinenematidae) towards High-Bush Blueberry (Vaccinium corymbosum) Root Volatiles

Transmission Success of Entomopathogenic Nematodes Used in Pest Control

What Is More Important to Host-Seeking Entomopathogenic Nematodes, Innate or Learned Preference?

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