Архивы diseases of rose • Roses and Garden https://rossad12.ru/en/tag/diseases-of-rose/ Сайт о розах. Уход за розами. Размножение роз. Болезни и вредители роз. Сорта роз. Группы роз. Ландшафтный дизайн. Клумбы. Газон. Кусты и кустарники. Деревья. Водоемы. Стили садов. Интересные идеи для сада. Большой сад. Маленький сад. Известные сады мира. Новости из мира роз и не только. Флористика. Колористика. Thu, 22 Nov 2018 18:23:16 +0000 en-US hourly 1 https://rossad12.ru/wp-content/uploads/2019/08/favicon-75x75.png Архивы diseases of rose • Roses and Garden https://rossad12.ru/en/tag/diseases-of-rose/ 32 32 ROSES: BLACK SPOT & HOW TO BEAT IT https://rossad12.ru/en/roses-black-spot-how-to-beat-it/ https://rossad12.ru/en/roses-black-spot-how-to-beat-it/#respond Thu, 22 Nov 2018 18:23:16 +0000 https://rossad12.ru/?p=10266 Black spot of roses (Marssonina rosae) is a disease that is ubiquitous. The most susceptible to this disease are areas where it rains a lot during the season. The fungus infects plants at the beginning of the growing season, and the signs appear in July-August. Manifested in the leaves in the form of round or star-shaped dark brown or black spots. With the intensive development of black spots, the spots merge, covering the entire surface of the sheet. The disease will progress at a temperature of 19-23 C and high humidity. Deficiency in black spot contributes to a lack of

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