EN
A mixture of peat or composted pine bark with podsol or loam soils resulted in a significant decrease of development of Fusarium wilt of cyclamen and carnation. Amendment of peat with Fusaclean at the dose 1.6 g/l or Trichoderma spp. significantly inhibited the spread of Fusarium wilt of cyclamen and Phytophthora rot of gerbera. Regular fertilization of carnation with calcium and iron chelates strongly decreased the spread of Fusarium wilt. Amendment of medium with keratin-bark-urea extract already at the dose 1.6 μg/cm3 strongly inhibited sporulation of Phytophthora palmivora, whereas the application of extract at the dose 200 μg/cm3 as peperomia spray inhibited the development of necrotic spots on leaves about 75%. In vitro growth of Botrytis cinerea, Fusarium oxysporum f. sp. dianthi, Myrothecium roridum and Phytophthora cryptogea was inhibited from 45 to 100% when 500 μg/cm3 of Echinacea extract was added to PDA. The extract at the dose 0.1% used as Impatiens spray inhibited in 60% Myrothecium leaf spot development.