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Tijdschrift Over Plantenziekten

, Volume 64, Issue 4, pp 301–306 | Cite as

Control ofLygus Campestris on carrot seed crops in North Holland

Met een samenvatting: De bestrijding vanLygus campestris in zaadwortelen in Noordholland

  • H. M. Th. van Turnhout
  • P. A. van der Laan
Article
  • 46 Downloads

Summary

In a field experiment againstLygus campestris, attacking the young seeds of carrots cultivated for seed in North Holland, two treatments with an atomized spray of 0.75% DDT prevented an increase of the population of the bugs which started 18 days after the first treatment. Dieldrin-spray, 0.2% Dieldrex 15, had less effect. DDT raised the yield of the treated crop from 53 to 89 per cent., dieldrin from 53 to 65 per cent., estimated by counting the well-germinated seeds per plot.

Samenvatting

In Noordholland werd een veldproef opgezet om de werking van DDT en dieldrin na te gaan op de populatie vanLygus campestris (L.). Deze wants tast de zaden aan van wortelen, die in de omgeving van Hoorn gekweekt worden voor zaadwinning en veroorzaken daarbij embryoloosheid. Op 5 en 17 juli 1957 werd gespoten met 0,75% DDT en 0,2% Dieldrex 15. DDT bleek lange tijd de wantsenpopulatie sterk te drukken, terwijl dieldrin veel minder effectief bleek.

Kiemproeven met het aldus behandelde en onbehandeld zaad toonden aan dat, waar de controleveldjes een kiemingspercentage gaven van 53%, dit op de DDT veldjes verhoogd was tot 89% en op de dieldrinveldjes tot 65%. Op de DDT-veldjes bleek ook het percentage slecht gekiemde zaden, te wijten aan schimmel- en bacterieaantasting na de kieming, in vergelijking met de controleveldjes sterk te zijn gedaald.

Keywords

Plant Pathology Field Experiment Dieldrin Treated Crop Seed Crop 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Kluwer Academic Publishers 1958

Authors and Affiliations

  • H. M. Th. van Turnhout
    • 1
  • P. A. van der Laan
    • 1
  1. 1.Laboratorium voor Toegepaste EntomologieAmsterdamThe Netherlands

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