Management
The main form of spreading of P. fragariae is through infected material. Strict regulations in many countries have been instituted regarding the transportation and disposal. For instance, Norway requires an official statement saying that the location you are planting has not been known to host P. fragariae and that the plants you are planting show no symptoms. Fosetyl-alcohol and fungicides have been approved for use against P. fragariae. These chemicals, when applied in late autumn just before the infection of new roots, have been proven to be effective against var. fragariae, but not var. rubi. Fungicides containing phenylamides have been approved when applied in early spring or late autumn. Some strains with phenylamide resistance have been found and have proven to be problematic in Germany and North America. Resistant plants have been bred and are commercially available. The resistance may be race specific and usually used where one strain is predominant. Due to the importance of water in germination and infection, good drainage can help reduce the proliferation of the disease.
Read more about this topic: Phytophthora Fragariae
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