Brassica downy Mildew (Hyaloperonospora parasitica) – identify and control
Brassica downy mildew, Peronospora parasitica is widespread in all countries with temperate climates, being very damaging, especially in the seedling phase of plants. The pathogen attacks both cultivated and spontaneous brassicas (crucifers).
Symptoms. The disease occurs more frequently on young plants in seedlings or immediately after being planted in the field. On the first leaves, there are spots of 1-3 mm of discoloration, yellow, evolving to gray-brown. On the underside of the leaves, towards the spots that have an irregular shape, a gray fuzz appears. Then, the spots enlarge, join, and if the weather is humid, large areas of the leaves are destroyed, which rot or dry out.
When the attack takes place later, even rotten bulbs can be reported. The attacked seedlings have gray or brown spots, the leaves are also spotted and contain infected seeds. The attack of this fungus on cauliflower prevents the formation of inflorescence, and a general infection can be seen on kohlrabis and radishes.
The pathogen is Peronospora parasitica. The fungus resists over the winter in the form of resistant spores or as a resistant mycelium in the roots of the seed crops. During the growing season, in humid weather, with frequent rains or fog, the fungus spreads very easily through the spores that appeared on the mycelium.
Prevention and control. It is recommended to gather and destroy the plant debris from in the field, disinfect or change the soil in the nursery, use healthy seeds. At the beginning of the first symptoms, to control brassica downy mildew, treatments with specific fungicides are recommended.
Recommended products
-
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store -
You can find products on a different store
Change Store