Electrophysiological responses of male and female <i><scp>A</scp>myelois transitella</i> antennae to pistachio and almond host plant volatiles

Beck, John J.; Light, Douglas M.; Gee, Wai S.

doi:10.1111/eea.12243

Cited by 26 publications

(14 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Odor samples were prepared in similar fashion to Beck et al . () by loading 7 mm bioassay discs with 20 μl of pentane containing each compound at each of two loading doses: 40 or 0.4 μmol. Pilot experiments revealed these loading doses provided consistent antennal responses to known honey bee pheromones and have been used previously (Bhagavan & Smith, ).…”

Section: Methodsmentioning

confidence: 99%

Nectar‐inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator

et al. 2017

Self Cite

View full text Add to dashboard Cite

SummaryThe plant microbiome can influence plant phenotype in diverse ways, yet microbial contribution to plant volatile phenotype remains poorly understood. We examine the presence of fungi and bacteria in the nectar of a coflowering plant community, characterize the volatiles produced by common nectar microbes and examine their influence on pollinator preference.Nectar was sampled for the presence of nectar-inhabiting microbes. We characterized the headspace of four common fungi and bacteria in a nectar analog. We examined electrophysiological and behavioral responses of honey bees to microbial volatiles. Floral headspace samples collected in the field were surveyed for the presence of microbial volatiles.Microbes commonly inhabit floral nectar and the common species differ in volatile profiles. Honey bees detected most microbial volatiles tested and distinguished among solutions based on volatiles only. Floral headspace samples contained microbial-associated volatiles, with 2-ethyl-1-hexanol and 2-nonanone -both detected by bees -more often detected when fungi were abundant.Nectar-inhabiting microorganisms produce volatile compounds, which can differentially affect honey bee preference. The yeast Metschnikowia reukaufii produced distinctive compounds and was the most attractive of all microbes compared. The variable presence of microbes may provide volatile cues that influence plant-pollinator interactions.

show abstract

Section: Methodsmentioning

confidence: 99%

Nectar‐inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator

et al. 2017

Self Cite

View full text Add to dashboard Cite

show abstract

“…Voltinism and generation length for navel orangeworm are tied to the seasonality of their food source. Adults are attracted to volatiles released by nuts at various points of maturation and decay (Beck et al., , ). Overwintering larvae develop slowly inside nuts left on trees postharvest (i.e., mummies) or on the ground, and adults emerge the following spring to oviposit on other mummies (Wade, ; Sanderson et al., ; Bentley et al., ).…”

Section: Introductionmentioning

confidence: 99%

Interrelation of mating, flight, and fecundity in navel orangeworm females

Rovnyak

Burks

Gassmann

et al. 2018

Entomologia Exp Applicata

View full text Add to dashboard Cite

The navel orangeworm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae, Phycitini), is an economically important pest of nut crops in California, USA. Improved management will require better understanding of insect dispersal, particularly relative to when mating occurs. A previous study demonstrated a more robust laboratory flight capacity compared to other orchard moth pests, but it was unclear how mating affects dispersal, and how dispersal affects fecundity. In this study, 1-and 2-day-old females were allowed to fly overnight on a flight mill either before or after mating, respectively, and were then allowed to oviposit. Data on fecundity were compared between treatments to minimally handled or tethered-only control females. Females that mated before flight flew longer and covered a greater distance than those flying prior to mating. However, timing of flight relative to mating did not affect fecundity, nor did any measure of flight performance. There was no effect on fecundity when females were forced to fly for designated durations from 3 min to 2 h. Together, our data revealed no obvious trade-off between flight activity and reproductive output. Distances measured on the flight mills (mean ca. 15 km for mated females) may overestimate net displacement in the field where flight tracks are often meandering. The results suggest that most females mate and oviposit in or near their natal habitat, but that some may disperse potentially long distances to oviposit elsewhere. KeywordsAmyelois transitella, flight mills, dispersal, almonds, pistachios, Lepidoptera, Pyralidae RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. Key words: Amyelois transitella, flight mills, dispersal, almonds, pistachios, Lepidoptera, Pyralidae AbstractThe navel orangeworm, Amyelois transitella (Walker) (Lepidoptera: Pyralidae, Phycitini), is an economically important pest of nut crops in California, USA. Improved management will require better understanding of insect dispersal, particularly relative to when mating occurs. A previous study demonstrated a more robust laboratory flight capacity compared to other orchard moth pests, but it was unclear how mating affects dispersal, and how dispersal affects fecundity. In this study, 1-and 2-day-old females were allowed to fly overnight on a flight mill either before or after mating, respectively, and were then allowed to oviposit. Data on fecundity were compared between treatments to minimally handled or tethered-only control females. Females that mated before flight flew longer and covered a greater distance than those flying prior to mating. However, timing of flight relative to mating did not affect fecundity, nor did any measure of flight performance. There was no effect on fecundity when females were forced to fly for designated durations from 3 min to 2 h. Together, our data revealed no obvious trade-off between flight activity and reproductive outp...

show abstract

“…That study found that pre-harvest sampling of almonds and trapping for females provided the best available prediction of damage, with an r 2 of approximately 0.5. Alternative attractants provide improved detection of navel orangeworm and are less impacted by mating disruption [ 42 , 55 , 56 , 57 ]. It is unclear, however, whether captures baited with these attractants which capture both sexes in traps [ 42 ] are as directly related to damage as the female traps in the previously mentioned study, and it appears there may be a trade-off between prediction power and detection sensitivity.…”

Section: Discussionmentioning

confidence: 99%

Individual and Additive Effects of Insecticide and Mating Disruption in Integrated Management of Navel Orangeworm in Almonds

Higbee¹,

Burks

2021

Insects

View full text Add to dashboard Cite

Damage from Amyelois transitella, a key pest of almonds in California, is managed by destruction of overwintering hosts, timely harvest, and insecticides. Mating disruption has been an increasingly frequent addition to these management tools. Efficacy of mating disruption for control of navel orangeworm damage has been demonstrated in experiments that included control plots not treated with either mating disruption or insecticide. However, the navel orangeworm flies much farther than many orchard pests, so large plots of an expensive crop are required for such research. A large almond orchard was subdivided into replicate blocks of 96 to 224 ha and used to compare harvest damage from navel orangeworm in almonds treated with both mating disruption and insecticide, or with either alone. Regression of navel orangeworm damage in researcher-collected harvest samples from the interior and center of management blocks on damage in huller samples found good correlation for both and supported previous assumptions that huller samples underreport navel orangeworm damage. Blocks treated with both mating disruption and insecticide had lower damage than those treated with either alone in 9 of the 10 years examined. Use of insecticide had a stronger impact than doubling the dispenser rate from 2.5 to 5 per ha, and long-term comparisons of relative navel orangeworm damage to earlier- and later-harvested varieties revealed greater variation than previously demonstrated. These findings are an economically important confirmation of trade-offs in economic management of this critical pest. Additional monitoring tools and research tactics will be necessary to fulfill the potential of mating disruption to reduce insecticide use for navel orangeworm.

show abstract

Electrophysiological responses of male and female Amyelois transitella antennae to pistachio and almond host plant volatiles

Cited by 26 publications

References 43 publications

Nectar‐inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator

Nectar‐inhabiting microorganisms influence nectar volatile composition and attractiveness to a generalist pollinator

Interrelation of mating, flight, and fecundity in navel orangeworm females

Individual and Additive Effects of Insecticide and Mating Disruption in Integrated Management of Navel Orangeworm in Almonds

Contact Info

Product

Resources

About