Decrypting Cryptic Click Beetle Species by Analysis of Sex Pheromones

2015 ◽  
Vol 41 (8) ◽  
pp. 740-745 ◽  
Author(s):  
Christian König ◽  
Johannes L. M. Steidle ◽  
Till Tolasch
Keyword(s):  
Sex Pheromones ◽  
Beetle Species ◽  
Click Beetle

Determination of distribution of harmful click beetle species (Coleoptera, Elateridae) by synthetic sex pheromones

1993 ◽  
Vol 19 (8) ◽  
pp. 1607-1611 ◽  
Author(s):  
I. Kudryavtsev ◽  
K. Siirde ◽  
K. L��ts ◽  
V. Ismailov ◽  
V. Pristavko
Keyword(s):  
Sex Pheromones ◽  
Beetle Species ◽  
Click Beetle

scholarly journals The Effect of Simulated Seasonal Temperatures On Metarhizium Brunneum-Associated Mortality In Two Click Beetle Species, And A Degree-Day Infection Model

2021 ◽  
Author(s):  
Todd Kabaluk ◽  
Sophie Ruau ◽  
Anita Poon
Keyword(s):  
Infection Model ◽  
Beetle Species ◽  
Agricultural Pests ◽  
Degree Days ◽  
Click Beetles ◽  
Agriotes Obscurus ◽  
Metarhizium Brunneum ◽  
Temperature Oscillations ◽  
Click Beetle ◽  
Gradient Plate

Abstract Wireworms (Coleoptera: Elateridae), the larvae of adult click beetles are subterranean and generalist crop pests that can be difficult to target. Targeting adult beetles, however, may be an effective method to lower wireworm populations. Metarhizium brunneum (Petch) kills click beetles but the mortality rate was expected to vary according to temperature. Using a thermal gradient plate to simulate daily oscillating temperatures for April, May, and June, the effectiveness of M. brunneum strains LRC112 and F52 in causing mortality to Agriotes obscurus (L.) and A. lineatus (L.) beetles was studied. Mortality was fastest in beetles exposed to June temperatures and slowest in those exposed to April temperatures, with differences among beetle species x M. brunneum strain combinations. Warmer temperatures resulted in more rapid mycelial outgrowth and conidiation in beetle cadavers, with only A. obscurus infected with M. brunneum LRC112 attaining near 100% conidiation. The number of degree days required to kill 50% of the beetles (LDD50) was least for A. obscurus infected with M. brunneum LRC112 (176) followed by A. obscurus x M. brunneum F52 (212), A. lineatus x M. brunneum LRC112 (215), and A. lineatus x M. brunneum F52 (292). Hypothetical calculations showed that M. brunneum exposure earlier in the season resulted in a longer LT50 but the earliest LT50 calendar date. Later M. brunneum exposure dates resulted in lower LT50’s, but later LT50 dates. This conceptual work demonstrates the importance of considering daily temperature oscillations, seasonality, and degree days in predicting the efficacy of entomopathogens to manage agricultural pests.

DISTRIBUTION AND DYNAMICS OF THE GROUND BEETLE (COLEOPTERA, CARABIDAE) AND THE CLICK BEETLE (COLEOPTERA, ELATERIDAE) SPECIES ABUNDANCE IN ORGANIC AND INTENSIVELY CULTIVATED CEREAL CROPS

2015 ◽  
Author(s):  
Sonata KAZLAUSKAITĖ ◽  
Povilas MULERČIKAS ◽  
Vytautas TAMUTIS ◽  
Audronė ŽEBRAUSKIENĖ ◽  
Elena SURVILIENĖ
Keyword(s):  
Ground Beetle ◽  
Species Abundance ◽  
Beetle Species ◽  
Poecilus Cupreus ◽  
Organic Farm ◽  
Agriotes Obscurus ◽  
Large Numbers ◽  
Click Beetle ◽  
In The Beginning ◽  
Agriotes Lineatus

The research has been carried out in 2013–2014 in an organic farm located in Medsėdžiai village, Klaipėda district, and intensive farm located in Laiviai village, Kretinga district. Four agrocenoses have been investigated: wheat, triticale, oat, and multiannual grassland. Five pitfall traps were set out in each of agrocenosis and the traps were active from the last decade of April until the last decade of August. Ground beetle adults that were detected during the study belonged to 27 species and 15 genera. The most abundant ground beetle species were Poecilus cupreus L., Pterostichus melаnаrius Ill, Аmаrа аeneа Deg, Cаrаbus cаncellаtus Ill., Hаrpаlus rufipes Deg., Аnchomenus dorsаlis Pontop. and Bembidion properаns Steph., representatives of which were detected in large numbers in all without an exception investigated agrocenoses and in both types of farming. Two seasonal activity peaks of P. cupreus L. abundance were distinguished in the organic farm: first in the beginning of June and the second in the mid-July. Meanwhile, in the intensive farm it was observed in late May. Click beetle adults, identified in the study, were prescribed to 6 species and 4 genera. The most abundant click beetle species were Agriotes obscurus L., Agriotes lineatus L. and Agriotes sputator L. which occurred without an exception in all the agrocenoses and both types of farms. It was determined that the highest click beetle adults’ activity in the intensive farm was observed in the end of July while the maximum of click beetle adults’ activity in the organic farm was defined in June.

scholarly journals Comparative Antennal Morphology of Agriotes (Coleoptera: Elateridae), with Special Reference to the Typology and Possible Functions of Sensilla

Insects ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 137 ◽  
Author(s):  
Michel J. Faucheux ◽  
Tamás Németh ◽  
Robin Kundrata
Keyword(s):  
Sex Pheromones ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Background Information ◽  
Monitoring And Control ◽  
Sensilla Trichodea ◽  
Click Beetle ◽  
Species Specific ◽  
And Control ◽  
Considerable Damage

Species of the click-beetle genus Agriotes Eschscholtz are economically important crop pests distributed mainly in the Northern Hemisphere. They can inflict considerable damage on various field crops. Therefore, the detection, monitoring, and control of Agriotes include the adult trapping using species-specific sex pheromones, which is a critical component of pest research. To obtain a better understanding of the detailed antennal morphology as background information for subsequent chemical ecology research, we conducted a scanning electron microscopy study of the antennal sensilla of both sexes in 10 European Agriotes species. We identified 16 different sensilla in Agriotes, belonging to six main types: sensilla chaetica (subtypes C1 and C2), sensilla trichodea, sensilla basiconica (subtypes B1–B9), dome-shaped sensilla (subtypes D1 and D2), sensilla campaniformia, and Böhm sensilla. We discuss their possible functions and compare the sensilla of Agriotes with those of other Elateridae in order to consolidate the sensillum nomenclature in this family. Additionally, our study reveals the remarkable interspecific variability in sensillar equipment of Agriotes and identifies several characters of potential importance for future use in systematic studies. The present study provides a strong preliminary framework for subsequent research on the antennal morphology of this crop pest on a wider scale.

scholarly journals The island rule of body size demonstrated on individual hosts: phytophagous click beetle species grow larger and predators smaller on phylogenetically isolated trees

2016 ◽  
Vol 43 (7) ◽  
pp. 1388-1399 ◽  
Author(s):  
Freerk Molleman ◽  
Alexandre Depoilly ◽  
Philippe Vernon ◽  
Jörg Müller ◽  
Richard Bailey ◽  
...  
Keyword(s):  
Body Size ◽  
Beetle Species ◽  
Island Rule ◽  
Isolated Trees ◽  
Click Beetle

scholarly journals Can Larvae of Forest Click Beetles (Coleoptera: Elateridae) Feed on Live Plant Roots?

Insects ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 850
Author(s):  
Mikhail V. Kozlov ◽  
Alexander S. Prosvirov ◽  
Elena L. Zvereva
Keyword(s):  
Boreal Forests ◽  
Life Histories ◽  
Direct Proof ◽  
Plant Roots ◽  
Food Sources ◽  
Beetle Species ◽  
Tree Roots ◽  
Forest Pests ◽  
Click Beetle ◽  
Forest Plants

The life histories of many soil-dwelling invertebrates remain poorly studied. The larvae of two click beetle species, Athous subfuscus and Dalopius marginatus, which are most abundant in European boreal forests, are both classified as omnivorous and are included in lists of root-damaging pests. Nevertheless, we are not aware of any direct proof of their ability (or inability) to consume plant roots. In this study, we asked whether these larvae actually feed on the roots of forest plants in the absence of other food sources. Live roots of boreal forest plants, including trees (Betula pubescens, Picea abies and Pinus sylvestris) and grass (Deschampsia flexuosa), were offered to click beetle larvae in a two-month microcosm experiment. The weight of roots placed in vials with the wireworms did not decrease, indicating that the larvae of these click beetle species did not feed on live roots, even in the absence of other food sources. This suggests that the feeding niches of A. subfuscus and D. marginatus larvae are narrower than previously thought and do not include live plant tissues. Therefore, these click beetle species should be excluded from the lists of forest pests damaging tree roots.

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