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IMMOVERT

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Dégat du gel ( boutons floraux et fleurs )

Posted on December 29, 2010 at 11:26 AM
IMMOVERT - Dégât du gel sur fleursSignes de présence:
Les bourgeons changent de couleur: ils brunissent et deviennent parois mous, faciles à écraser. Les pétales des fleurs écloses brunissent eux aussi: ils peuvent conserver leur forme ou bien se flétrir. Les boutons floraux ou les fleurs situés sur les parties les plus exposées de la plante sont souvent  le plus abîmés. Le gel n'endommage les boutons floraux et les fleurs qu'à partir d'un certain stade de leur développement: certains restent intacts, tandis que d'autres sont détruits. Chez certains arbres fruitiers comme le prunier, le gel peut entraîner une perte sévère ou totale de la récolte.
 
Cause:
Les effets du gel sont surtout à craindre chez les plantes peu rustiques ou qui ont un développement précoce.Les gelées tardives survenant après l'éclosion des fleurs font également beaucoup de dégâts. Les plantes exposés à l'est, rapidement réchauffées par le soleil au petit matin, souffrent encore plus es éventuelles gelées nocturnes.
 
Moyens de lutte:
Veillez à planter l'arbre ou l'arbuste en un emplacement adéquat, notamment pur les plantes à floraison précoce ou qui sont peu rustiques. Enveloppez les plantes fragile d'un voile horticole ou de tout autre matériau de protection.
 
Réservez votre cours de jardin " rubrique Nous contacter " pour apprendre à reconnaître les symptômes de vos végétaux et appliquer le traitement correspondant.

Categories: Problèmes courants sur végétaux

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