Mildiu
Downy Mildew
Peronospora Sparsa
Pathogen:
Oomycete
Type:
Risk to the plant:
INTERMEDIATE
DESCRIPTION
WHO CAUSES IT?
Peronospora sparsa is an oomycete fungus that causes the disease known as downy mildew in blackberry crops. This disease can cause significant damage to blackberry crops, affecting both the quality and yield of the fruit. The fungus mainly infects the leaves, stems and fruits of the plant, spreading rapidly in conditions of high humidity and moderate temperatures.
SYMPTOMS
In blackberry crops, Peronospora sparsa causes a series of characteristic symptoms. These include the formation of yellow Taches on the leaves, which may be covered with white or grayish mycelium. Over time, these Taches can enlarge and merge, causing discoloration and wilting of the leaves. In addition, watery lesions can be observed on the stems and fruits, which may eventually rot if the infection is severe.
TEMPERATURE AND HUMIDITY
15°C - 25°C
80%
HOW IS IT SPREAD?
Wind, rain, infected plant material, contact between plants.
HOW TO REMOVE IT?
Home remedies
There are no home treatments
Chemical treatments
• ORANGE OIL 60g/L [ME] P/S
• POTASSIUM PHOSPHONATES 51% (Exp. as phosphorous acid) [SL] P/V
• LAMINARIN 4.5% [SL] P/S
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
Authorized treatments in organic farming
• ORANGE OIL 60g/L [ME] P/S
• LAMINARIN 4.5% [SL] P/S
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• CUPROCALCIC SULFATE 12.4% (EXPR. IN CU) [SC] P/V
Insect allies
PREDATORY MITES
LADYBUGS
LACEWINGS
PARASITIC WASPS
HOVERFLIES OR PARASITIC FLIES
PREDATORY BUGS
There are no natural allies
Mycodiplosis oidii (predatory mosquito)
EFFECTIVE PRODUCTS TO ELIMINATE THIS DISEASE
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To prevent and control downy mildew in blackberry crops, it is recommended to implement integrated pest management practices. This includes selecting resistant varieties, removing infected plant debris, controlling weeds, and using preventative fungicides. Additionally, it is important to maintain good air circulation around the plants to reduce humidity and avoid overwatering.
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