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IMMOVERT

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Puceron des racines du rosier

Posted on December 29, 2010 at 4:40 AM
IMMOVERT - Puceron des racines du rosierSignes de présence:
Ce puceron brun foncé, de 3 à 4 mm de long, se nourrit en prélevant la sève des racines du rosier. Il passerait certainement inaperçu s'il ne grimpait dans les tiges pour y déposer des oeufs, en automne. Après la ponte, les oeufs sont bruns, puis ils deviennent rapidement noir lustré. Ils mesurent 1 mm de long, ont une forme de ballon de rugby et sont groupés en nombre au bas des tiges. Ils éclosent en mars, et les jeunes pucerons descendent aussitôt dans le sol.
 
Cause:
Des pucerons piqueurs suceurs, Maculolachni submacula. La puissance des attaques varie considérablement suivant les années, mais a de toute façon peu d'impact sur la croissance des rosiers.
 
Moyens de lutte:
On peut supprimer beaucoup d'oeufs lors de la taille des rosiers. Une fois qu'ils sont éclos, traitez ces pucerons comme les autres pucerons du rosier.
 
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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