About: Negative effect of fungicides used in practical hop protection against downy mildew (Pseudoperonospora humuli) on aphidophagous coccinellids Propylea quatuordecimpunctata L.     Goto   Sponge   NotDistinct   Permalink

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Description
  • Still increasing attention has been paid to the development of IPM systems within EU countries. Natural enemies play a very important role in these systems. Therefore, it is necessary to use only such pesticides, whose harmfulness is generally lower and acceptable. Downy mildew (Pseudoperonospora humuli) is commonly controlled by fungicides applied during the season. Nevertheless, at that time numerous aphidophagous predators, especially coccinellids are present on leaves of the treated plants feeding on aphids. Ladybird Propylea quatuordecimpunctata L. belongs to the most important species attacking damson-hop aphid (Phorodon humuli Schrank). Fungicides, which are in current use, were tested on eggs, larvae, pupae and adults of this ladybird species to determine their real effect and convenience of their inclusion within IPM systems. The fungicides tested in the bioassays increased the mortality rate of each developmental stage of P. quatuordecimpunctata. Adults of coccinellids were more resistant to the fungicides than the other developmental stages. Very low susceptibility was found out after treatment with azoxystrobin. High tolerance of adults was confirmed also in the other tested fungicides. Eggs and larvae were generally more susceptible than adults. Azoxystrobin again showed the lower toxicity and its convenience for IPM system as the mortality of eggs as well as larvae was the lowest. On the contrary, copper fungicides showed commonly higher mortality.
  • Still increasing attention has been paid to the development of IPM systems within EU countries. Natural enemies play a very important role in these systems. Therefore, it is necessary to use only such pesticides, whose harmfulness is generally lower and acceptable. Downy mildew (Pseudoperonospora humuli) is commonly controlled by fungicides applied during the season. Nevertheless, at that time numerous aphidophagous predators, especially coccinellids are present on leaves of the treated plants feeding on aphids. Ladybird Propylea quatuordecimpunctata L. belongs to the most important species attacking damson-hop aphid (Phorodon humuli Schrank). Fungicides, which are in current use, were tested on eggs, larvae, pupae and adults of this ladybird species to determine their real effect and convenience of their inclusion within IPM systems. The fungicides tested in the bioassays increased the mortality rate of each developmental stage of P. quatuordecimpunctata. Adults of coccinellids were more resistant to the fungicides than the other developmental stages. Very low susceptibility was found out after treatment with azoxystrobin. High tolerance of adults was confirmed also in the other tested fungicides. Eggs and larvae were generally more susceptible than adults. Azoxystrobin again showed the lower toxicity and its convenience for IPM system as the mortality of eggs as well as larvae was the lowest. On the contrary, copper fungicides showed commonly higher mortality. (en)
Title
  • Negative effect of fungicides used in practical hop protection against downy mildew (Pseudoperonospora humuli) on aphidophagous coccinellids Propylea quatuordecimpunctata L.
  • Negative effect of fungicides used in practical hop protection against downy mildew (Pseudoperonospora humuli) on aphidophagous coccinellids Propylea quatuordecimpunctata L. (en)
skos:prefLabel
  • Negative effect of fungicides used in practical hop protection against downy mildew (Pseudoperonospora humuli) on aphidophagous coccinellids Propylea quatuordecimpunctata L.
  • Negative effect of fungicides used in practical hop protection against downy mildew (Pseudoperonospora humuli) on aphidophagous coccinellids Propylea quatuordecimpunctata L. (en)
skos:notation
  • RIV/14864347:_____/13:#0000504!RIV14-MZE-14864347
http://linked.open...avai/riv/aktivita
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  • I
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 91118
http://linked.open...ai/riv/idVysledku
  • RIV/14864347:_____/13:#0000504
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • hop plant protection; natural enemies; coccinellids; Propylea quatuordecimpunctata L.; damson-hop aphid; fungicides; downy mildew (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [F2D0520A72CA]
http://linked.open...v/mistoKonaniAkce
  • Žatec, ČR
http://linked.open...i/riv/mistoVydani
  • Leuven, Belgie
http://linked.open...i/riv/nazevZdroje
  • Acta Horticulturae 1010
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Vostřel, Josef
http://linked.open...vavai/riv/typAkce
http://linked.open.../riv/zahajeniAkce
issn
  • 0567-7572
number of pages
http://purl.org/ne...btex#hasPublisher
  • International Society for Horticultural Science (ISHS)
https://schema.org/isbn
  • 978-90-6605-696-1
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