Potential of 2,4-Dihydroxybenzoic Acid as an Oviposition Stimulant for Mass-Reared Ladybird Beetles

Riddick, Eric W.; Wu, Zhixin; Eller, Fred J.; Berhow, Mark A.

doi:10.1093/jisesa/iez012

Cited by 5 publications

(8 citation statements)

References 26 publications

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“…Lastly, a final study tested the effectiveness of 2,4-dihydroxybenzoic acid (DHBA), which is a degradation product of the flavonoid morin, to stimulate oviposition by C . maculata [ 33 ]. Although DHBA altered the oviposition site selection behavior of C .…”

Section: Evidence Of Oviposition Stimulationmentioning

confidence: 99%

“…This suggests that tactile and gustatory receptors are more important than olfactory receptors in perception of DHBA and perhaps other high molecular weight compounds. DHBA was considered a weak oviposition stimulant [ 33 ].…”

Section: Evidence Of Oviposition Stimulationmentioning

confidence: 99%

“…Are olfactory receptors important in detection of non-VOCs? Female coccinellids must touch or taste non-VOCs such as flavonoids and flavonoid derivatives before oviposition stimulation can occur [ 17 , 18 , 33 ], suggesting that olfactory receptors have a limited role in detection of non-VOCs and oviposition stimulation in coccinellids. Yet, one coccinellid species, H .…”

Section: Evidence Of Oviposition Stimulationmentioning

confidence: 99%

“…VOCs can have a moderate-to-high odor strength (see Table 2 ), but low rate of persistence on treated substrates or plant foliage. In contrast, mechanoreceptors and/or gustatory receptors could be more important than olfactory receptors in detection of non-VOCs by coccinellids [ 33 ].…”

Section: Synthesismentioning

confidence: 99%

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Volatile and Non-Volatile Organic Compounds Stimulate Oviposition by Aphidophagous Predators

Riddick

2020

Insects

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Introduction: Evidence that volatile organic compounds (VOCs) and non-VOCs stimulate oviposition by aphidophagous predators is scattered throughout the literature. The objectives of this review are to (1) compile records indicating that VOCs and non-VOCs are responsible for oviposition stimulation, (2) calculate an egg production ratio (EPR) for stimulated predators, and (3) determine if EPR is correlated with vapor pressure and molecular weight of active compounds. Methods: The USDA (United States Department of Agriculture), National Agricultural Library, online digital catalog system was used to retrieve abstracts, then the full text of manuscripts on oviposition stimulants for predators. Oviposition-stimulating VOCs and non-VOCS were tabulated with molecular weights and vapor pressure estimates. EPRs were calculated for stimulated coccinellids, syrphids, and chrysopids. Results: Both VOCs and non-VOCs stimulated oviposition behavior by coccinellids and syrphids, but not chrysopids. EPR was greatest for syrphids. Two VOCs, (E)-β-farnesene and 3-methyl-2-butenal, stimulated very high EPR values by the syrphid Episyrphus balteatus. Regardless of predator taxa, EPR was negatively and positively correlated with molecular weight and vapor pressure, respectively. Conclusions: Syrphids (rather than coccinellids or chrysopids) produce more eggs in response to VOCs. Organic compounds with low-to-moderate molecular weights and moderate-to-high vapor pressures might be most effective oviposition stimulants for aphidophagous predators.

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Section: Evidence Of Oviposition Stimulationmentioning

confidence: 99%

Section: Evidence Of Oviposition Stimulationmentioning

confidence: 99%

Section: Evidence Of Oviposition Stimulationmentioning

confidence: 99%

Section: Synthesismentioning

confidence: 99%

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Volatile and Non-Volatile Organic Compounds Stimulate Oviposition by Aphidophagous Predators

Riddick

2020

Insects

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“…The hypothesis that S. gilvifrons can develop and reproduce on artificial diets devoid of tetranychid mites was tested in laboratory bioassays. Also, previous research showed that the phenolic compound 2,4-dihydroxybenzoic acid (DHBA) was a weak oviposition stimulant for the aphidophagous ladybird beetle Coleomegilla maculata (DeGeer) [ 39 ]. Consequently, the hypothesis that DHBA could increase reproduction (oviposition) in S .…”

Section: Introductionmentioning

confidence: 99%

Effects of Three Artificial Diets on Life History Parameters of the Ladybird Beetle Stethorus gilvifrons, a Predator of Tetranychid Mites

Ebrahimifar

Shishehbor

Rasekh

et al. 2020

Insects

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Background: The ladybird beetle Stethorus gilvifrons (Mulsant) is an important natural enemy of tetranychid mites and functions as a biological control of these plant pests. The development, survival and reproduction of S. gilvifrons were studied when fed on three artificial diets. The components of the artificial diet that S. gilvifrons could be reared successfully on for one generation with no use of tetranychid mites were examined. Methods: Artificial diets consisted of sucrose, honey, royal jelly, agar, yeast, date palm pollen supplemented in different diets with hen’s egg yolk (AD1, as basic diet), Ephestia kuehniella Zeller eggs (AD2), or E. kuehniella eggs and 2,4-dihydroxybenzoic acid (AD3). Results: Adults and larvae of Stethorusgilvifrons fed on AD1 had a shorter immature development and preoviposition periods than those fed on AD2 and AD3. The total number of deposited eggs was significantly higher for the females fed on AD3 than on the other diets. The intrinsic rate of increase (r) of S. gilvifrons was highest on AD3, followed by AD2, and AD1. Conclusion: Stethorus gilvifrons performed best on AD3, indicating the potential of this artificial diet for the mass rearing of this important predatory ladybird beetle.

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Secondary metabolites and their impact on symbiotic interactions in the ambrosia fungusGeosmithia eupagioceri

Kolařík,

Stodůlková,

Kajzrová

et al. 2024

Preprint

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Ambrosia fungi colonize freshly dead trees, sequester nutrients, and serve as nutritional source for ambrosia beetles in exchange for dispersal. A key aspect of this symbiosis is the ability of fungi to colonize and dominate the wood around the beetle tunnels, forming a monospecific nutritional mycelium in the beetle gallery. Hypotheses for these dynamics include active beetle management, fungal inoculation priority, and the fungus’s chemical ecology facilitating resource capture and competition. The ecological role of allelochemicals produced by ambrosia fungi is unknown, although they may suppress microbes while being harmless to beetles, which has potential medical or food technology applications. This study presents a comprehensive analysis of secondary metabolites from the ambrosia fungusGeosmithia eupagioceri(Ascomycota: Hypocreales). Eight extracellular compounds were identifiedin vitro: 5-hydroxymethyl-2-furancarboxylic acid, 4-hydroxybenzoic acid, 2,3-dihydroxybenzoic acid, 3,4-dihydroxybenzoic acid, 4-hydroxyphenylacetic acid (4-HPA), 4-HPA methyl ester, tyrosol, and thymine. Most compounds show cross-taxon activity, suppressing the growth of bacteria, fungi, a nematode, and a mite. We have shown that often overlooked chemically simple compounds may have activities leading to increased fitness of beetle hosts, including previously unconsidered activity against mites and nematodes. For the first time, we point out that these compounds also have the previously unconsidered potential to modulate the physiology of their producer (by inducing symbiotic morphology by quorum sensing mechanisms), the beetle host and associated microbes through synergism. Furthermore, we have shown that the ambrosia fungi have biotechnological potential in the search for growth suppressors of microorganisms and invertebrates, not toxic to humans.IMPORTANCEBark and ambrosia beetles and their microbial symbionts play crucial roles in forest ecosystems by aiding in the decomposition of dead trees, nutrient cycling, and habitat creation. However, they can cause extensive damage to both natural and planted forests by killing trees. Our study has led to a fundamental shift in the understanding of interactions between beetle symbiotic fungi and the environment, mediated by secondary metabolites. Newly, we show that these substances can not only be antimicrobial but also suppress the growth of mites, nematodes, but also can modulate the physiology of the producer fungus and potentially the host beetle and associated microbes. Our study, although conducted on a relatively artificial system with the need for validation on other lineages of ambrosia fungi, suggests entirely new research directions in the understanding of bark beetle holobiont and ambrosia beetles.

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Potential of 2,4-Dihydroxybenzoic Acid as an Oviposition Stimulant for Mass-Reared Ladybird Beetles

Cited by 5 publications

References 26 publications

Volatile and Non-Volatile Organic Compounds Stimulate Oviposition by Aphidophagous Predators

Volatile and Non-Volatile Organic Compounds Stimulate Oviposition by Aphidophagous Predators

Effects of Three Artificial Diets on Life History Parameters of the Ladybird Beetle Stethorus gilvifrons, a Predator of Tetranychid Mites

Secondary metabolites and their impact on symbiotic interactions in the ambrosia fungusGeosmithia eupagioceri

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