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Actualité Sanitaire RESEAU DE SURVEILLANCE BIOLOGIQUE DU TERRITOIRE 2014 PAYS DE LA LOIRE rédigé par Noémie JACQUEMIN - FREDON Pays de la Loire ACTUALITES Pyrale du buis Actualité sanitaire Vol en baisse. Surveiller les chenilles. Pyrale du buis Information sanitaire Les vols de pyrale sont en baisse par rapport sont toujours signalées en région angevine et Rouille blanche du chrysan- thème à fin septembre en région nantaise. plus précisément dans des espaces verts si- tués aux Ponts-de-Cé. Il n’y a pas de papillons capturés dans les Aculops du fuchsia pièges du réseau. Un observateur a cependant Surveiller vos pièges et vos buis, en observant détecté, il y a une dizaine de jours, sur un site bien l’intérieur de l’arbuste pour détecter pré- EcophytoPic, portail de la pro- localisé au nord de Nantes, un papillon et la cocement les éventuelles chenilles. tection intégrée de la protec- présence de chrysalides, présageant des pro- tion des cultures chaines émergences de papillons, Des attaques de chenilles sont parallèlement Information dernière minute observées. Un nouveau foyer de jeunes che- nilles a été détecté sur la côte vendéenne, sur Psylle et puceron de la commune de Brem-sur-Mer. Des chenilles l’Elaeagnus FREDON PdL Chenille de pyrale du buis (peut mesurer jusqu’à 5 cm au dernier stade FREDON IdF Papillon de la pyrale du buis (3,6 à 4,4 cm d’envergure; ailes blanches bordées de brun et reflets violacés ABONNEMENT BSV Retrouvez le bulletin de santé du végétal … ou inscrivez-vous en ligne pour être sur le web... informé directement par mail de chaque www.draaf.pays-de-la-loire.agriculture.gouv.fr nouvelle parution : www.paysdelaloire.chambagri.fr http://www.paysdelaloire.chambagri.fr/menu/ vegetal/surveillance-biologique-du-territoire/sinscrire- www.fredonpdl.fr au-bsv-cest-gratuit.html RESEAU DE SURVEILLANCE BIOLOGIQUE DU TERRITOIRE 2014 Page 2 PAYS DE LA LOIRE BSV ORNEMENT – N ° 1 6 D U 24 OCTOBRE 2014 Information sanitaire Rouille blanche du chrysanthème La présence de rouille blanche, Puccinia horiana, a été constatée thèmes destinés à la plantation. dans une entreprise sur des chrysanthèmes de la variété ‘Gugus Pour les cultures finies de chrysanthème, il est exigé de supprimer Rouge’ cultivés en extérieur. Cette observation est l’occasion d’atti- les plantes ou parties atteintes, et en fin de culture, d’éliminer tous rer la vigilance des producteurs vis-à-vis de cette maladie qui pro- les déchets, d’assainir les emplacements contaminés et d’effectuer fite des températures fraîches et de l’humidité importante (eau vides sanitaires et rotations. d’arrosage ou de pluie) pour infecter les tissus. Pour réduire les risques de développement de cette maladie, il faut préalablement utiliser des boutures saines et préférer des variétés peu sensibles. En cours de culture, éviter le confinement de la vé- gétation en distançant les pots. Les arrosages excessifs par asper- sion et en fin de journée sont déconseillés. En cas de maladie sur pieds-mères, boutures et jeunes plants raci- nés de chrysanthèmes destinés à un producteur, il conviendra de contacter le SRAl régional (Tél : 02 41 72 32 32) qui prescrira les mesures de lutte à mettre en œuvre afin d’éviter sa dissémination, car Puccinia horiana est classée parmi les organismes nuisibles de FREDON Pays de la Loire quarantaine dans l’Union européenne pour les végétaux de chrysan- Symptômes de rouille blanche sur chrysanthème Aculops fuchsiae En cette saison, les galles foliaires provoquées par Aculops fuch- de la sensibilité de l’espèce de fuchsia considérée. siae (acarien microscopique) sont bien visibles en site contaminé. Trois espèces sont signalées comme très sensibles : le fuchsia de Non observable à l’œil nu, les symptômes qu’il provoque sont le Magellan (Fuchsia magellanica), le fuchsia arbustif (Fuchsia arbo- signe de sa présence. Cet acarien, de la famille des Eriophyidae, rescens), le fuchsia rampant (Fuchsia procumbens). Plusieurs es- induit des galles foliaires par ses piqûres. Ces galles qui gonflent et pèces et cultivars sont reconnus comme résistants : Fuchsia micro- prennent une teinte rouge ressemblent à la cloque du pêcher. Les phylla subsp. Microphylla, F. thymifolia, F. camposportoi, F. regia, F. fleurs aussi se déforment et la croissance est stoppée. Les fuchsias hatschbachii, F. alpestris, F. glazioviana. contaminés finissent par dépérir. En cas de détection de cet organisme nuisible qui est réglementé L’acarien vit et se reproduit dans les plis des tissus atteints de dans l’Union européenne, contactez le SRAl de votre région (Tél : galle. Au cours de la croissance de la plante, ce parasite quitte la 02 41 72 32 32) qui prescrira les mesures de lutte à mettre en région de la galle et migre vers le haut afin de s’attaquer aux nou- œuvre afin d’éviter sa dissémination. velles pousses. La femelle pond environ 50 œufs qui éclosent au Dans l’attente de l’intervention d’un technicien, confiner les plantes bout de 7 jours. Le cycle dure environ 21 jours à 18°C avec plu- infectées dans des sieurs générations au cours de la saison de végétation. Les condi- sacs poubelles tions optimales de développement du ravageur correspondent au noirs, les fermer climat océanique, avec des hivers et étés doux. de façon étanche. Originaire d’Amérique du sud et détecté pour la première fois en Si possible, les 2003 dans le golf du Morbihan et à partir de 2004 en Loire- exposer au soleil. Atlantique. Les moyens de propagation sont le vent, les insectes, Les fortes tempé- les oiseaux, les outils, les vêtements. Sur de plus grandes dis- ratures détruisent tances, les importations internationales et les échanges de bou- cet acarien. tures entre collectionneurs permettent également sa dissémina- tion . L’importance des dégâts occasionnés par Aculops fuchsiae dépend FREDON Pays de la Loire Galles sur fuchsia causées par Aculops RESEAU DE SURVEILLANCE BIOLOGIQUE DU TERRITOIRE 2014 Page 3 PAYS DE LA LOIRE BSV ORNEMENT – N ° 1 6 D U 24 OCTOBRE 2014 EcophytoPic, portail de la protection intégrée des cultures Le portail EcophytoPIC a pour vocation de rassembler un maximum - les plateformes filières au nombre de 6 (Grandes cultures, Arbori- d’informations concernant les techniques de protection intégrée culture, Cultures légumières, Cultures tropicales, Horti-PPAM, Viti- des cultures et la réglementation. culture). Il comprend 11 rubriques thématiques sur des sujets ayant trait à la protection intégrée et des rubriques support permet- Il est destiné avant tout à donner des pistes en matière de mé- tant d’animer le site. thodes de lutte mais également à informer sur d’autres thèmes pour mettre en œuvre la protection intégrée des cultures. Ces thèmes sont la surveillance des bio-agresseurs, la formation, les outils disponibles, les innovations et la recherche. Tout comme la protection intégrée, ce portail sera évolutif en fonc- tion des données expérimentales et de terrain recueillies. Il est divisé en deux grandes composantes : - la plateforme transversale qui développe les généralités et les définitions et vous met en lien avec les données filières : Plus d’infos, en cliquant sur la vignette ci-dessus Information de dernière minute Elaeagnus Psylle de l’Elaeagnus : la diapause estivale des psylles de Puceron de l’Elaeagnus (Capitophorus elaeagni) : il est de retour l'Elaeagnus est terminée depuis fin septembre début octobre. Ac- pour la ponte. En extérieur cela attire beaucoup de coccinelles (qui tuellement nous sommes au début de la seconde génération font leurs réserves pour l'hiver) et quelques syrphes. (premiers foyers larvaires). Restez vigilant. RESEAU DE SURVEILLANCE BIOLOGIQUE DU TERRITOIRE 2014 PAYS DE LA LOIRE Ce bulletin est produit à partir d’observations ponctuelles. S’il donne une tendance de la situation sanitaire régionale, celle-ci ne peut être transposée telle quelle à la parcelle. La CRAPL dégage donc toute responsabilité quant aux décisions prises par les agriculteurs pour la protection de leurs cultures et les invite à prendre ces décisions sur la base des observations qu’ils auront réalisées sur leurs parcelles. .
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