. Les fleuristes [microforme] examen. La floriculture. O INVESTiaATION de maladies. Pour Ameilcaii La Société Bose tbe. Une vaste enquête et des maladies de roses a été pris par le Department of Plant Pathology, Cornell University. Ce travail, qui a été commencé le 1 août 1916, est mené en collaboration avec l'American Rose Society, dont les mem- bres ont contribué à l'appui financier de l'entreprise. Au cours des trois derniers mois de temps a été consacré à visiter les plantations de rose dans le nord-est des États-Unis, en faisant un sondage auprès des maladies. Les jardins a

• Contributeur: Library Book Collection / Alamy Banque D'Images
• ID de l’image: RRJETR
• Taille du fichier: 7,2 MB (155,4 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 2031 x 1231 px | 34,4 x 20,8 cm | 13,5 x 8,2 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. Florists' review [microform]. Floriculture. O INVESTiaATION OF DISEASES. For tbe Ameilcaii Bose Society. A special and extensive investigation of the diseases of roses has been under- taken by the department of plant pathology, Cornell University. This work, which was begun August 1, 1916, is being conducted in cooperation with the American Rose Society, whose mem- bers have contributed towards the financial support of the undertaking. During the last three months much time has been spent in visiting rose plantings in the northeastern United States, making a survey of diseases. The gardens and greenhouses of some thirty-five rose growers have been vis- ited. The number and extent of the diseases present have been noted and specimens taken for further study. Growers have also materially aided the work by sending in specimens. These specimens have been examined and the grower advised as to the cause and con- trol of the disease so far as our present knowledge and experience allow. Practical Knowledge Sought. Unfortunately, nothing is known con- cerning the control of many diseases of tiie rose, and but little concerning even some of the most common diseases; and what little is known is mostly of an academic rather than of a practical nature and not accessible to the average grower. Every grower who has en- deavored to obtain much information upon any rose disease has been brought face to face with this unfortunate situa- tion. It is for the correction of this condition that members of the Ameri- can Rose Society have tenlisted the ser- vices of a plant pathologist to investi- gate rose diseases and place the in- formation before the growers. The preliminary survey has shown that the two most common diseases of the rose are the powdery mildew and the black spot, both on indoor and out- door plants. These diseases have re- ceived the most attention of growers and plant pathologists in the past. It has been proved beyond doubt that they are caused by fungi, the life-hi