Ajouté à Mes favoris.

Logo Agri-Réseau
S'informerLe savoir et l'expertise du réseau agricole et agroalimentaire
Logo Agri-Réseau
S'informerLe savoir et l'expertise du réseau agricole et agroalimentaire

S'informer

Le savoir et l'expertise du réseau agricole et agroalimentaire

Chargement en cours

Filtrer la recherche
  • Sujet(s) :
  • Production(s) :
630 documents correspondants à votre recherche et/ou filtre(s) sélectionné(s)

Nouveau

24 janvier 2020
L'honorable Marie-Claude Bibeau, ministre de l'Agriculture et de l'Agroalimentaire, a annoncé la création du premier Conseil canadien de la jeunesse agricole le 24 janvier 2020. Ce Conseil des jeunes sera composé de femmes et d'hommes, âgés de 18 à 30 ans, provenant de partout au pays, y compris des représentants des communautés autochtones. Nous sommes à la recherche de jeunes leaders agricoles pour partager leurs expériences personnelles, leurs perspectives uniques et leurs idées novatrices sur la façon de s'attaquer aux enjeux nouveaux et émergents auxquels sont confrontés les jeunes dans le monde de l'agriculture et de l'agroalimentaire. Veuillez partager le communiqué de presse ci-joint par l'intermédiaire de vos réseaux et contacts respectifs ainsi que directement avec les jeunes leaders agricoles que vous connaissez peut-être. Le communiqué de presse comprend un lien vers la page Web d'AAC, où les personnes intéressées peuvent soumettre leur candidature en ligne pour devenir membre du Conseil canadien de la jeunesse agricole. Étant donné que nous souhaitons rejoindre le plus grand nombre possible de jeunes Canadiens, il est possible que vous receviez ce courriel de multiples sources. Si vous avez des questions, veuillez contacter aafc.roundtable-tableronde.aac@canada.ca.   Lire la suite

Nouveau

21 janvier 2020

Nouveau

20 janvier 2020
Ce rapport contient les résultats des essais de cultivars et porte-greffes de pommiers dans les parcelles du RECUPOM en 2019.
15 janvier 2020
Different monitoring techniques were compared in three apple orchards in Quebec, Canada, to evaluate their reliability as tools for estimation of plum curculio activity on damage to fruits, during three consecutive years. Adult plum curculio activity was monitored for four weeks starting at bloom, and damage to fruits was assessed by examination of apple fruitlets during that same period. Adult captures obtained by means of classical limb tapping or visual examination techniques were compared to pyramidal traps adapted from a trap developed for the pecan weevil, Curculio caryae (Horn) (Coleoptera: Curculionidae). No single monitoring technique was found to be superior under all conditions. In most cases (eight out of nine), the first signs of activity were detected at the same time or earlier by the trapping device then by visual examination of fruitlets. Examination of fruitlets appeared superior in terms of effectiveness (number of activity signs detected) but trapping appeared equivalent to visual examination of fruitlets in terms of efficiency (number of activity signs detected per unit of time spent monitoring). In a second experiment, the effectiveness of the standard pyramidal trap was compared to traps of alternative size, shape, and quality. In this experiment, flexible (fabric) traps were more powerful than rigid ones prior to bloom, and 30 cm high traps were more powerful than standard 120 cm high traps following bloom. In light of these results, monitoring using flexible semi conical traps is recommended early in the season to detect and locate first signs of activity, and visual examinations are recommended following bloom, to further detect signs and determine the need for control measures. Lire la suite
15 janvier 2020
A local strain of Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae) was mass produced and released weekly in 0.25-ha plots of four commercial apple orchards to evaluate the level of parasitism in sentinel egg masses of the obliquebanded leafroller, Choristoneura rosaceana Harris (Lepidoptera: Tortricidae). Sentinel eggs were attached to foliage, either on release trees or at mid-distance between two release trees, and were renewed every 3-4 days. Other sentinel eggs were placed in adjacent plots (approx. 20 m from the release plots). The incidence of parasitism and number of eggs parasitized within each mass were evaluated. In dwarf tree orchards, parasitism was lower on sentinel egg masses placed at mid-distance between two release trees than on release trees; however, parasitism was more uniform in semi-dwarf tree orchards. The detection of parasitoid activity in the adjacent plots, even upwind, showed that under repetitive releases at a high release rate, many parasitoids travelled or were transported more than 20 m from their release site. The occurrence of parasitism and the number of parasitized eggs per mass were higher in release plots than in adjacent plots, but partial parasitism of host egg masses generally occurred, even in close proximity to release sites. In addition, even if host finding efficiency was higher, parasitized egg masses in release plots were not more heavily parasitized than those in adjacent plots. These results suggest that interference between females or detection of previously parasitized hosts may prevent additional oviposition in the same egg mass by conspecifics, and that the level of this response is less pronounced for females that travelled further from their emerging sites before encountering a host. Lire la suite
15 janvier 2020
Hyaliodes vitripennis (Say) is a predatory mirid that feeds on spider mites, aphids, and immature stages of various ot her insects. It is sparsely distributed in North America but in the apple orchards of Quebec, Canada, it can be one of the four most important biological control agents of aphids and mites, provided that selective insecticides and other integrated pest man agement practices are used. The objectives of this two year study were to 1) quantify the population distribution of the insect in Quebec orchards, 2) pinpoint appearance dates of its different developmental stages in those orchards, 3) locate preferred mi cro habitats and measure time spent in these various habitats, and 4) compare the suitability of various rearing conditions. The predator was found in 68 85% of visited orchards. First observations were recorded, on average, around the beginning of July, a nd first adults between the end of July and the beginning of August depending on the year. Populations peaked on average 0-1 weeks following the appearance of adults. Only one generation per year was observed. Adults were observed until the first week of September and they spent 95% of their time on the underside of leaves. Among prey tested ( Tetranychus urticae, Panonychus ulmi, Myzus persicae, Macrosiphum euphorbiae and Choristoneura rosaceana ), mirids fed with T. urticae had a higher survival rate and higher longevity. P. ulmi and C. rosaceana larvae were the least suitable preys and aphids were intermediate. Lire la suite
08 janvier 2020
Communiqué de Presse provenant du cabinet du ministre du ministère de l'Agriculture, des Pêcheries et de l'Alimentation: Le ministre de l'Agriculture, des Pêcheries et de l'Alimentation, M. André Lamontagne, annonce la tenue d'un nouvel appel de projets dans le cadre de l'Initiative ministérielle «Productivité végétale» visant l'efficacité de la main-d'œuvre et des travaux agricoles. Les entreprises qui se consacrent à la production végétale ou à l'apiculture et qui souhaitent se prévaloir des avantages de l'Initiative ministérielle sont invitées à déposer leur demande entre le 8 janvier 13h et le 27 février 2020 à 23h59. Une enveloppe budgétaire de 10 millions de dollars est disponible pour cet appel de projets, ce qui devrait permettre le financement d'environ 500 projets. Concrètement, cette enveloppe permettra d'encourager la compétitivité des entreprises, notamment en favorisant l'amélioration de la productivité de la main-d'œuvre. Pour plus d'informations, consultez la page du MAPAQ Initiative ministérielle « productivité végétale » Lire la suite
07 janvier 2020
Different monitoring techniques were compared in three apple orchards in Quebec, Canada, to evaluate their reliability as tools for estimation of plum curculio activity on damage to fruits, during three consecutive years. Adult plum curculio activity was monitored for four weeks starting at bloom, and damage to fruits was assessed by examination of apple fruitlets during that same period. Adult c aptures obtained by means of classical limb tapping or visual examination techniques were compared to pyramidal traps adapted from a trap developed for the pecan weevil, Curculio caryae (Horn) (Coleoptera: Curculionidae). No single monitoring technique was found to be superior under all conditions. In most cases (eight out of nine), the first signs of activity were detected at the same time or earlier by the trapping device then by visual examination of fruitlets. Examination of fruitlets appeared superior in terms of effectiveness (number of activity signs detected) but trapping appeared equivalent to visual examination of fruitlets in terms of efficiency (number of activity signs detected per unit of time spent monitoring). In a second experiment, the effectiveness of the standard pyramidal trap was compared to traps of alternative size, shape, and quality. In this experiment, flexible (fabric) traps were more powerful than rigid ones prior to bloom, and 30 cm high traps were more powerful than standard 120 cm high traps following bloom. In light of these results, monitoring using flexible semi conical traps is recommended early in the season to detect and locate first signs of activity, and visual examinations are recommended following bloom, to further detect signs and determine the need for control measures. Lire la suite
07 janvier 2020
Hyaliodes vitripennis (Say) is a predatory mirid that feeds on spider mites, aphids, and immature stages of various ot her insects. It is sparsely distributed in North America but in the apple orchards of Quebec, Canada, it can be one of the four most important biological control agents of aphids and mites, provided that selective insecticides and other integrated pest man agement practices are used. The objectives of this two year study were to 1) quantify the population distribution of the insect in Quebec orchards, 2) pinpoint appearance dates of its different developmental stages in those orchards, 3) locate preferred mi cro habitats and measure time spent in these various habitats, and 4) compare the suitability of various rearing conditions. The predator was found in 68 85% of visited orchards. First observations were recorded, on average, around the beginning of July, a nd first adults between the end of July and the beginning of August depending on the year. Populations peaked on average 0-1 weeks following the appearance of adults. Only one generation per year was observed. Adults were observed until the first week of September and they spent 95% of their time on the underside of leaves. Among prey tested (Tetranychus urticae, Panonychus ulmi, Myzus persicae, Macrosiphum euphorbiae and Choristoneura rosaceana), mirids fed with T. urticae had a higher survival rate and h igher longevity. P. ulmi and C. rosaceana larvae were the least suitable preys and aphids were intermediate. Lire la suite
07 janvier 2020
A local strain of Trichogramma minutum Riley (Hymenoptera: Trichogrammatidae) was mass produced and released weekly in 0.25-ha plots of four commercial apple orchards to evaluate the level of parasitism in sentinel egg masses of the obliquebanded leafroller, Choristoneura rosaceana Harris (Lepidoptera: Tortricidae). Sentinel eggs were attached to foliage, either on release trees or at mid-distance between two release trees, and were renewed every 3-4 days. Other sentinel eggs were placed in adjacent plots (approx. 20 m from the release plots). The incidence of parasitism and number of eggs parasitized within each mass were evaluated. In dwarf tree orchards, parasitism was lower on sentinel egg masses placed at mid-distance between two release trees than on release trees; however, parasitism was more uniform in semi-dwarf tree orchards. The detection of parasitoid activity in the adjacent plots, even upwind, showed that under repetitive releases at a high release rate, many parasitoids travelled or were transported more than 20 m from their release site. The occurrence of parasitism and the number of parasitized eggs per mass were higher in release plots than in adjacent plots, but partial parasitism of host egg masses generally occurred, even in close proximity to release sites. In addition, even if host finding efficiency was higher, parasitized egg masses in release plots were not more heavily parasitized than those in adjacent plots. These results suggest that interference between females or detection of previously parasitized hosts may prevent additional oviposition in the same egg mass by conspecifics, and that the level of this response is less pronounced for females that travelled further from their emerging sites before encountering a host. Lire la suite
1 à 10 sur 630

Ceci est la version du site en développement. Pour la version en production, visitez ce lien.