Both male‐ and female‐produced pheromones influence Colorado potato beetle movement in the field

SUMMARY A male-produced aggregation pheromone was identified for the Colorado potato beetle Leptinotarsa decemlineata (Say) (Coleoptera:Chrysomelidae). While male beetles produced only minor amounts of the pheromone, its production could be enhanced by topical application of juvenile hormone III (JH III) (eightfold), by antennectomy (40-fold) or by the combined treatment of JH III and antennectomy (almost 200-fold); this enhancement enabled the identification of the compound as(S)-3,7-dimethyl-2-oxo-oct-6-ene-1,3-diol [(S)-CPB I], a unique structure for an insect pheromone. Antennal receptors of both sexes responded selectively to the (S)-enantiomer. Both male and female Colorado potato beetles were attracted to serial source loads of(S)-CPB I in laboratory bioassays; (R)-CPB I was inactive or inhibitory, as demonstrated by the inactivity of the racemate. This is the first identification of a pheromone for the Colorado potato beetle and differs from the paradigm of a female-produced pheromone for this insect. The attractant is also the first male-produced pheromone identified for the Chrysomelidae. The discovery that both JH III and antennectomy increase levels of the pheromone (S)-CPB I indicates the existence of a feedback system involving antennal input, and this system may be under hormonal control.

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The Colorado Potato Beetle

Scientific American ◽

10.1038/scientificamerican10021880-3957dsupp ◽

1880 ◽

Vol 10 (248supp) ◽

pp. 3957-3957

Keyword(s):

Colorado Potato Beetle ◽

Potato Beetle

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Supplementary data for: Dillapiol: A Pyrethrum Synergist for Control of the Colorado Potato Beetle

Journal of Economic Entomology ◽

10.1603/ec13440sf1 ◽

2014 ◽

Keyword(s):

Colorado Potato Beetle ◽

Supplementary Data ◽

Potato Beetle

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RNA-based biocontrol for Colorado potato beetle and corn rootworm control

10.1603/ice.2016.93847 ◽

2016 ◽

Author(s):

Pascale Feldmann

Keyword(s):

Colorado Potato Beetle ◽

Corn Rootworm ◽

Potato Beetle

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Faculty Opinions recommendation of The genetic architecture of a niche: variation and covariation in host use traits in the Colorado potato beetle.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.1088908.542038 ◽

2007 ◽

Author(s):

Ary Hoffmann

Keyword(s):

Colorado Potato Beetle ◽

Genetic Architecture ◽

Host Use ◽

Niche Variation ◽

Potato Beetle

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AFLP-Based Genetic Linkage Map of the Colorado Potato Beetle Leptinotarsa decemlineata: Sex Chromosomes and a Pyrethroid-Resistance Candidate Gene

Genetics ◽

10.1093/genetics/158.2.695 ◽

2001 ◽

Vol 158 (2) ◽

pp. 695-700 ◽

Cited By ~ 1

Author(s):

David J Hawthorne

Keyword(s):

Candidate Gene ◽

Linkage Map ◽

Colorado Potato Beetle ◽

Leptinotarsa Decemlineata ◽

Genetic Linkage ◽

Genetic Linkage Map ◽

Sex Chromosome ◽

Pyrethroid Resistance ◽

Codominant Markers ◽

Potato Beetle

Abstract A genetic linkage map was constructed from an intraspecific cross of the Colorado potato beetle, Leptinotarsa decemlineata. This is an initial step toward mapping the loci that underlie important phenotypes associated with insect adaptation to an agroecosystem. The map was made with 172 AFLP and 10 anonymous codominant markers segregating among 74 backcross (BC1) individuals. Markers were mapped to 18 linkage groups and a subset of the markers with a mean intermarker distance of 11.1 cM is presented. A pyrethroid-resistance candidate gene, LdVssc1, was placed onto the map as well. The sex chromosome was identified by exploiting the XO nature of sex determination in this species using patterns of variation at LdVssc1 and the codominant markers.

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Field Efficacy of Steinernema sp. (Rhabditida: Steinernematidae) on the Colorado Potato Beetle Overwintering Generation

Plants ◽

10.3390/plants10071464 ◽

2021 ◽

Vol 10 (7) ◽

pp. 1464

Author(s):

Maja Čačija ◽

Renata Bažok ◽

Majda Kolenc ◽

Tena Bujas ◽

Zrinka Drmić ◽

...

Keyword(s):

Colorado Potato Beetle ◽

First Generation ◽

Control Measures ◽

Recommended Dose ◽

Steinernema Feltiae ◽

First Year ◽

Potato Beetle ◽

Field Efficacy ◽

Second Year ◽

Economic Pest

Colorado potato beetle (CPB) is an economic pest of potato that has developed resistance to all classes of chemical insecticides, thus requiring alternative control measures. As a potential solution, entomopathogenic nematodes (EPNs) have proven effective in suppressing this pest, but their efficacy against overwintering generations of CPB in Croatia has not been sufficiently researched. The aim of this two-year (2018–2019) field study was to determine the efficacy of Steinernema feltiae and Steinernema carpocapsae applied to overwintering CPB adults. EPNs were applied at three doses (7.5 mil./10 m2, 5.0 mil./10 m2 (the recommended dose) and 2.5 mil./10 m2) by watering the soil where the adults were overwintering. The first-year results were satisfactory for both EPNs: the efficacy of S. feltiae ranged from 79.03% to 100.00%, while the efficacy of S. carpocapsae ranged from 77.32% to 96.22%. In the second year, the highest efficacy (69.57%) was obtained using the recommended dose of S. feltiae. Although the results are not consistent across the two years of our study and suggest further research, they indicate that EPNs have great potential in controlling overwintering CPB generations to reduce first generation abundance and damage, and also to prevent the spread of new generations to surrounding potato growing areas.

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