Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Effects of fenvalerate and azinphosmethyl on two-spotted spider mite and phytoseiid mites (1981)
    Springer
    Entomologia experimentalis et applicata 30 (1981), S. 91-97 
    Details
    ISSN: 1570-7458
    Keywords: Tetranychus urticae ; Phytoseiids ; Fenvalerate ; Azinphosmethyl ; Mortality ; Sublethal effects ; Egg production ; Oviposition preference ; Repellency
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé Les insecticides pyrethroïdes ont été utilisés pour lutter contre les pullulations d'araignées rouges. Cette note examine les réponses de Tetranychus urticae Koch et des prédateurs phytoseiidés résistants aux organo-phosphorés, Amblyseius fallacis Garman et Typhlodromus occidentalis Nesbitt, au fenvalerate (pyrethroïde) et à l'azinphosmethyl (organophosphate). Quelques essais avec du carbaryl sont indiqués. Une femelle adulte de T. urticae est placée sur une rondelle de feuille de Phaseolus vulgaris L. pulvérisée dans une tour de Potter. Les résultats sur la mortalité en fonction de la dose obtenus montrent une activité plus rapide du fenvalerate que de l'azinphosmethyl. Les DL50 du fenvalerate (0,056 et 0,051g AI/I) sont les mêmes à 24 et 48 h, tandis que l'azinphosmethyl montre une activité plus lente (DL50 de 0,72 et 0,38g AI/I à 24 et 48 h). La mortalité se partage entre la sortie de la rondelle et la mortalité in situ. Le fenvalerate provoque une plus forte répulsion que l'azinphosmethyl. Contrairement à l'azinphosmethyl le fenvalerate inhibe la production d'oeufs 60% et 20% d'inhibition à DL50 au bout de 24 h par rapport au témoin. Cette inhibition n'est pas permanente. Le carbaryl n'a pas d'effets inhibiteur ou acaricide à 1g AI/l. Les femelles adultes de T. urticae décèlent les résidus de fenvalerate sur les rondelles et pondent leurs oeufs sur les moitiés non traitées ou traitées à l'azinphosmethyl. Les Phytoseiides sont très sensibles aux résidus de fenvalerate. Après consommation d'oeufs traités, A. fallacis est incapable d'éviter des bandes gluantes. T. occidentalis décèle des traitements à 0,00005g AI/l en quittant les lames traitées par les bandes gluantes.
    Notes: Abstract The pyrethroid fenvalerate showed significantly faster activity against adult ♀ two-spotted spider mite Tetranychus urticae Koch c.f. azinphosmethyl using broad bean leaf discs sprayed in a Potter tower. LC50s for fenvalerate were similar at 24 and 48 hr (0.056 and 0.051g AI/1) while LC50s for azinphosmethyl were significantly different at 24 and 48 hr (0.72 and 0.38g AI/1, respectively). Mortality was partitioned to run-off and direct mortality. Fenvalerate showed an increasing contribution to mortality by run-off with increasing concentration. Increasing concentrations of azinphosmethyl had no effect on the proportion of T. urticae running off the discs. Fenvalerate inhibited egg production c.f. azinphosmethyl (60% and 20% inhibition respectively c.f. control after 24hr). The effect was not permanent. Carbaryl showed no acaricidal or inhibitory effects at 1g AI/1. T. urticae detected fenvalerate residues as reflected by choice of oviposition sites on untreated halves of leaf discs c.f. treated halves. Azinphosmethyl had no effect on oviposition preference. Phytoseiid mites were highly sensitive to fenvalerate residues. Predators moved off the test arena into sticky barriers after feeding on fenvalerate-treated eggs or walking on glass slides treated at 0.00005g AI/1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00333916
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Functional response of pacific damsel bug,Nabis kinbergii [Hemiptera: Nabidae] (1987)
    Springer
    BioControl 32 (1987), S. 303-309 
    Details
    ISSN: 1573-8248
    Keywords: Pacific damsel bug ; nabid ; functional response ; Punaise du Pacifique ; nabide ; réponse fonctionnelle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Description / Table of Contents: Résumé La punaise,Nabis kinbergii Reuter est rencontrée communément dans les champs de luzerne à la fin de l'été et durant l'automne en Nouvelle Zélande. Son potentiel en tant que prédateur des espèces communes d'insectes ravageurs n'a pas encore été étudié. Ce travail rend compte de la roponse fonctionnelle des femelles adultes et des 5e stades larvaires de cette punaise vis-à-vis de deux espèces proies, le miride:Sidnia kinbergi (Stal) et le puceron du pois:Acyrtosiphon pisum (Harris). Une équation deHolling (1959) de type II définit bien la réponse fonctionnelle de ce prédateur sauf lorsque les 5e stades n'ont que des nymphes du Miride pour proie. Cette punaise,Nabis kinbergii manifeste des réponses identiques à celles d'un autreNabidae: Reduviolus americoferus (L.).
    Notes: Abstract The functional responses of adult and 5th instar Pacific damsel bug,Nabis kinbergii Reuter were determined under laboratory conditions using Australian crop mirid,Sidnia kinbergi (Stal), and pea aphid,Acyrthosiphon pisum (Harris) as prey.Holling's (1959) type II equation was found to adequately define the functional response of this predator except when 5th instar nymphs were provided with Australian crop mirid as prey. In this instance, a type III response was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02373255
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Pesticide-induced mite outbreaks: pyrethroids and spider mites (1988)
    Springer
    Experimental and applied acarology 4 (1988), S. 265-276 
    Details
    ISSN: 1572-9702
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Factors inducing outbreaks of spider mites (Acari: Tetranychidae) following use of pyrethroid insecticides are reviewed. Differentials in direct toxicity between spider mites and phytoseiid (Acari: Phytoseiidae) predators provide one explanation. Wide variation exists between pyrethroids in their direct toxicity toTetranychus urticae. The acaricidal action of pyrethroids is largely controlled by the amount of irritancy or repellency induced by the respective chemicals. Laboratory assays for repellency reflect field results. Repellent activity induces spider-mite dispersal to either recolonise plants free of residues or leave the treated habitat. Pyrethroids may also affect reproduction and development rates. Residual activity is likely to vary, so limiting any general theory of spider-mite responses to pyrethroids. Variable responses to pyrethroids, strain variation and development of behavioural resistance also add complications to understanding outbreaks. Future research needs are identified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01196190
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Ethyl nicotinate (1982)
    Springer
    Journal of chemical ecology 8 (1982), S. 1299-1303 
    Details
    ISSN: 1573-1561
    Keywords: Thrips obscuratus ; Thysanoptera ; Thripidae ; attractant ; ethyl nicotinate ; apricots ; peaches
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ethyl nicotinate was found to be a potent attractant forThrips obscuratus in peaches and apricots. The male-to-female ratio in traps was 1∶8. The chemical was more attractive than ripe fruit, with peak catches at harvest. Season-long trapping showed the efficiency of the chemical compared to unbaited traps. The chemical remained attractive for at least 2 weeks when 50 μl were placed in open 2-ml vial caps. Various pyralids, geometrids (Lepidoptera), and chironomids (Diptera) were also attracted in low numbers to ethyl nicotinate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00987763
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...