Behavioral and Electroantennographic Responses of Adults of Guava Weevil, Conotrachelus dimidiatus (Coleoptera: Curculionidae), to Synthetic Host-Associated and Conspecific Volatiles

2020 ◽  
Vol 49 (4) ◽  
pp. 810-814 ◽  
Author(s):  
Esmeralda García-Díaz ◽  
Felipe Tafoya ◽  
María P Elizalde-González
Keyword(s):  
Host Plant ◽  
Management Strategy ◽  
Psidium Guajava ◽  
Economic Losses ◽  
Natural Behavior ◽  
Volatile Pheromones ◽  
Electrophysiological Responses ◽  
Volatile Organic ◽  
Electroantennogram Recordings ◽  
Potential Use

Abstract Immature guava fruits (Psidium guajava L.) of commercial orchards in Mexico are affected by adults of Conotrachelus dimidiatus (Champion) causing economic losses to producers. The aim of this study was to assess the behavioral and electrophysiological responses of the weevil to selected semiochemicals emitted by the host plant fruit and to conspecifics. Volatile organic compounds isolated from host plant as β-caryophyllene, (S)-(−)-limonene, hexanal, and nonanal significantly attracted adults of both sexes in behavioral bioassays. Electroantennogram recordings showed largest responses to papayanal and grandlure III + IV released by C. dimidiatus and C. nenuphar, respectively. Our results indicate that behavioral and electroantennographic assays using synthetic compounds from host plant volatiles and insect volatile pheromones produce olfactometry and electroantennographic responses in C. dimidiatus. This is the first report of intraspecific chemical communication in this weevil. We discuss the significance of these responses for the natural behavior in guava orchards and their potential use in a pest management strategy.

scholarly journals Volatile organic metabolites and their importance in Senecio L. (Senecioneae: Asteraceae)

2016 ◽  
Vol 10 ◽  
pp. 12-18 ◽  
Author(s):  
Sudha Joshi Shrestha
Keyword(s):  
Secondary Metabolites ◽  
Plant Science ◽  
Nepal Himalaya ◽  
Propenoic Acid ◽  
Dichotomous Key ◽  
Volatile Organic ◽  
Ethanolic Extracts ◽  
Taxonomic Marker ◽  
Potential Use ◽  
Level Analysis

The present work aims to characterize volatile secondary metabolites in Senecio L. for delimiting taxa at the infrageneric level. Analysis of n-hexane fraction of ethanolic extracts of five species of Senecio L. (S. laetus Edgew., S. nudicaulis Buch.-Ham. ex D. Don, S. raphanifolius Wall. ex DC., S. royleanus DC. and S. scandens Buch.-Ham. ex D. Don) from Nepal Himalaya revealed the presence of a number of volatile secondary metabolites. Among them, 17 metabolites, viz., acorenol, bergamotene, cadin, cadinene, calarene, caryophyllene, cumialdehyde, cycloprop(e)azulene, elemol, farnesene, hexanol, intermedeol, muurolene, naphthalene, naphthalenone, propenoic acid and tridecane were considered for their potential use in chemotaxonomy of the genus. All species were characterized by the presence of cadin, elemol, farnesene, muurolene, naphthalenone and propenoic acid and absence of acorenol, cycloprop(e)azulene, hexanol and intermedeol. Cumialdehyde is present in all species except S. royleanus; cadinene is present in all tested species except S. nudicaulis and S. royleanus. Moreover, S. nudicaulis can be delimited from other species by the presence of bergamotene; S. royleanus can be delimited from other species by the presence of tridecane and caralene. Caryophyllene is present in S. raphanifolius and S. scandens and absent in S. laetus. Naphthalene is present in S. nudicaulis, S. royleanus and S. scandens, and absent in S. laetus and S. raphanifolius. Presence and absence of a single metabolite or a group of volatile organic metabolites indicates its significance as the taxonomic marker for delimiting taxa at infrageneric level. An artificial dichotomous key is prepared to delimit the taxa.Botanica Orientalis – Journal of Plant Science (2016) 10: 12–18

Modulation of feed composition is able to make hens less attractive to the poultry red mite Dermanyssus gallinae

Parasitology ◽  
2019 ◽  
Vol 147 (2) ◽  
pp. 171-181 ◽  
Author(s):  
Marine El Adouzi ◽  
Alfonsina Arriaga-Jiménez ◽  
Laurent Dormont ◽  
Nicolas Barthes ◽  
Agathe Labalette ◽  
...  
Keyword(s):  
Chemical Characterization ◽  
Gas Chromatography Mass Spectrometry ◽  
Economic Losses ◽  
Dermanyssus Gallinae ◽  
Poultry Red Mite ◽  
Feed Composition ◽  
Host Seeking ◽  
Choice Tests ◽  
Volatile Organic ◽  
Before And After

AbstractThe poultry red mite (PRM) is an obligatory haematophagous pest that causes substantial economic losses in poultry worldwide. The PRM does not live on the host but in the bird's environment and must find its host remotely. Hence, manipulating chicken odours is of interest. Several crude plant-originating volatile organic compounds (VOCs) have already been shown as repellent to Dermanyssus gallinae. We aimed to test whether these VOCs can interfere with PRM host-seeking behaviour by their oral administration to the poultry. The objectives were to determine (1) if hen odours are modified by supplemented feed ingestion and (2) if such treatment makes hens less attractive to the PRM. Chemical characterization by gas chromatography–mass spectrometry of the hen odour was conducted before and after the hens ingested the supplemented feed. The chromatograms obtained show that hen odour was substantially modified after the hens consumed it. Among the molecules recurrently detected from the supplemented hens, 26% were nearly absent in the unsupplemented hens. Behavioural choice tests to compare the effect of the modified and unmodified-host odours on the PRM show that some of the plant-originating emitted VOCs and the modified whole-hen odours were repellent to the PRM.

Host plant interactions between wheat germplasm source and wheat stem sawfly Cephus cinctus Norton (Hymenoptera: Cephidae) I. Commercial cultivars

2013 ◽  
Vol 93 (4) ◽  
pp. 607-617 ◽  
Author(s):  
B. L. Beres ◽  
H. A. Cárcamo ◽  
J. R. Byers ◽  
F. R. Clarke ◽  
C. J. Pozniak ◽  
...  
Keyword(s):  
Host Plant ◽  
Insect Pest ◽  
Economic Losses ◽  
Plant Interactions ◽  
Wheat Stem Sawfly ◽  
Cephus Cinctus ◽  
Wheat Germplasm ◽  
Commercial Cultivars ◽  
Solid Stem ◽  
The Impact

Beres, B. L., Cárcamo, H. A., Byers, J. R., Clarke, F. R., Pozniak, C. J., Basu, S. K. and DePauw, R. M. 2013. Host plant interactions between wheat germplasm source and wheat stem sawfly Cephus cinctus Norton (Hymenoptera: Cephidae) I. Commercial cultivars. Can. J. Plant Sci. 93: 607–617. The wheat stem sawfly (WSS) Cephus cinctus Norton (Hymenoptera: Cephidae) is an economically destructive insect pest of wheat in the northern Great Plains. A significant resurgence of the insect pest in the southern prairies of Canada caused substantial economic losses from 1999 through 2007. Solid-stem cultivar selection is critical to the management of WSS but adoption of the use of these cultivars was low, which compounded losses at harvest. A study was conducted from 2001 to 2003 in southern Alberta and Saskatchewan, Canada (1) to establish the range of susceptibility of hollow- and solid-stem varieties representing the major spring wheat classes and (2) to determine the impact of host plant on WSS population dynamics. The solid-stem varieties were generally superior at reducing damage and fitness response of WSS. However, in addition to the durum cultivars AC Navigator and AC Avonlea, the variety McKenzie, which was considered hollow, provided improved efficacy over other hollow-stem cultivars. Our study suggests solid-stem cultivars are highly effective but prone to inconsistent performance and should therefore be integrated into a holistic strategy for WSS that includes agronomics and biocontrol. A companion paper will report on the response of cultivars with novel sources of germplasm.

Behavioural and electrophysiological responses of Pantomorus cervinus (Boheman) (Coleoptera: Curculionidae) to host plant volatiles

2008 ◽  
Vol 47 (1) ◽  
pp. 24-31 ◽  
Author(s):  
Suk-Ling Wee ◽  
Ashraf M El-Sayed ◽  
Andrew R Gibb ◽  
Vanessa Mitchell ◽  
David M Suckling
Keyword(s):  
Host Plant ◽  
Plant Volatiles ◽  
Host Plant Volatiles ◽  
Electrophysiological Responses

The potential use of environmental information to manage squid stocks

2002 ◽  
Vol 59 (12) ◽  
pp. 1851-1857 ◽  
Author(s):  
D J Agnew ◽  
J R Beddington ◽  
S L Hill
Keyword(s):  
Management Strategy ◽  
Historical Data ◽  
Simulation Models ◽  
Life Cycles ◽  
Sea Surface ◽  
Short Life ◽  
Stock Biomass ◽  
Predictive Relationships ◽  
Potential Use

Most commercially exploited squid species have short life cycles and stocks composed of recruits from a single cohort, the size of which is unknown prior to the fishing season. Recent studies suggest that strong environment–recruitment relationships may exist for a number of squid stocks. Using simulation models based on Falkland Island Patagonian squid (Loligo gahi), the recruit abundance of which is predicted by sea-surface temperature, we propose a method for using predictive relationships in the management of squid populations. We compare a management strategy based on recruitment prediction with historical data from the fishery, which was managed in the absence of these predictions. Our results suggest that varying effort on the basis of an environmental correlate of recruitment can reduce the risk of not meeting conservation targets while increasing yield. Effort has to be reduced in years of low abundance but licensing additional effort in years of high abundance increases long-term average catches. Even if effort levels were not allowed to vary by more than 50% between years, a management strategy for L. gahi based on prediction would have resulted in higher average catches and a reduced probability of the stock biomass falling below a notional conservation limit.

Sign in / Sign up

Export Citation Format

Share Document