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IMMOVERT

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La cicadelle du rosier

Posted on December 29, 2010 at 5:05 AM
Signes de présence:
En été, les feuilles du rosier montrent une décoloration ponctiforme blanchâtre sur leur face supérieure. Les rosiers palissés contre un mur ou poussant en un lieu abrité sont souvent les plus touchés: en fin d'été, leurs feuilles seront presque entièrement décolorées. Des insectes jaune pale, de 3 mm de long, vivent au revers des feuilles. Ils sautent en volettent dès qu'ils sont dérangés. Leur corps étroit est plus large au niveau de la tête et effilé à l'arrière. Leur larve blanc crème est dépourvue d'ailes et se contente de ramper.
 
Cause:
Un insecte piqueur suceur, Edwardsiana rosae, qui produit deux à trois générations durant l'été.
 
Moyens de luttes:
Les aphicides ( insecticides utilisés contre les pucerons ) sont efficaces contre la cicadelle.
 
Nous commercialisons plusieurs traitements efficaces:
 
- un insecticide rosiers sous forme liquide à base de Imidaclopride sans classement
toxicologique en bidon de 1 litre.
- un anti pucerons prêt à l'emploi sous forme liquide à base de pyréthrines naturelles et de pipéronyl butoxyde utilisable en culture biologique en pulvérisateur de 750 ml.
- un insecticide acaricide rosiers et arbustes sous forme liquide à base d'huile minérale  utilisable en culture biologique en étui de 280 ml ou 750 ml.  
- un traitement total rosiers prêt à l'emploi en pulvérisateur de 750 ml à base de bifenthrine et de myclobutanil sans classement toxicologique pour lutter contre l'oïdium, la rouille, les taches noires, les pucerons, cochenilles, chenilles. A noter que la formulation est aussi adaptée aux traitements de vos plantes en pots sur vos terrasses, balcons et en intérieur.
 
Réservez votre cours de jardin " rubrique Nous contacter " pour apprendre à reconnaître les parasites et appliquer le traitement correspondant.
  

Categories: Les parasites des rosiers

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