Mildew
Mildew
Pathogen:
Oomycete
Type:
Risk:
HIGH
Mildiu
Plantas decorativas de jardín y/o interior
WHO CAUSES IT?
Downy mildew is a disease caused by different species of oomycetes, mainly from the genera Plasmopara, Peronospora and Bremia. These pathogens are obligate parasites that affect various plants, penetrating through stomata or wounds in the tissues. Upon infection, pathogens develop a network of hyphae within plant tissues, extracting nutrients and producing asexual reproductive structures known as sporangia. These sporangia are released in conditions of high humidity, dispersing by wind or water splashes. Upon landing on susceptible surfaces, they germinate and produce motile zoospores that swim to the stomata and resume the infectious cycle. Furthermore, some oomycetes can form resistant structures such as oospores that allow their survival in adverse conditions and guarantee the persistence of the pathogen in the soil or plant remains.
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SYMPTOMS
In plants, downy mildew causes varied symptoms that affect vigor and production. Initial symptoms usually include chlorotic or yellowish Taches on the surface of leaves that, over time, become necrotic and may coalesce, forming large areas of dead tissue. On the underside of the leaves, under conditions of high humidity, a cottony or powdery growth develops, characteristic of downy mildew. These areas may exude sporangia visible to the naked eye. Other symptoms include deformations in leaves, stems and fruits, as well as wilting and premature leaf fall. The disease can also affect photosynthesis and overall plant growth.
- Chlorotic Taches on leaves.
- Tissue necrosis.
- Cottony growth on the underside of the leaves.
- Deformations in leaves and stems.
- Premature fall of leaves.
- Reduction in plant growth and vigor.
TEMPERATURE AND HUMIDITY
15°C - 25°C
85% - 100%
TRANSMISSION ROUTES
Spores carried by wind, water splashes, contaminated tools, infected plant remains, infested plants, direct contact between plants
Do you want to remove this pest? Choose how you want to treat it.
TREATMENTS
Chemical treatments
• ORANGE OIL 6% [SL] P/V
• ORANGE OIL 60g/L [ME] P/S
• AZOXISTROBIN 25% [SC] P/V
• CAPTAN 47.5% [SC] P/V
• FOLPET 80% [WG] P/P
• FOSETIL 31% + Propamocarb 53% [SL] P/V
• CUPRIC HYDROXIDE 25% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• LAMINARIN 4.5% [SL] P/S
• METIRAM 70% [WG] P/P
• COPPER OXYCHLORIDE 14% (exp. in Cu) + CUPRIC HYDROXIDE 14% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 35% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 52% (EXPR. IN CU) [SC] P/V
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• PIRACLOSTROBIN 6.7% + BOSCALIDE 26.7% (I) [WG] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
Authorized treatments in organic farming
• ORANGE OIL 6% [SL] P/V
• ORANGE OIL 60g/L [ME] P/S
• CUPRIC HYDROXIDE 25% (EXPR. IN CU) [WG] P/P
• CUPRIC HYDROXIDE 50% (EXPR. IN CU) [WP] P/P
• LAMINARIN 4.5% [SL] P/S
• COPPER OXYCHLORIDE 14% (exp. in Cu) + CUPRIC HYDROXIDE 14% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 30% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 35% (exp. in Cu) [WG] P/P
• COPPER OXYCHLORIDE 35% (EXPR. IN CU) [WG] P/P
• COPPER OXYCHLORIDE 38% (EXPR. IN CU) [SC] P/V
• COPPER OXYCHLORIDE 50% (EXPR. IN CU) [WP] P/P
• COPPER OXYCHLORIDE 52% (EXPR. IN CU) [SC] P/V
• CUPROUS OXIDE 50% (EXPR. IN CU) [WP] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WG] P/P
• CUPROCALCIC SULFATE 20% (EXPR. IN CU) [WP] P/P
• TRIBASIC COPPER SULFATE 19% (EXPR. IN CU) [SC] P/V
Biological control
• BACILLUS SUBTILIS (strain IAB/BS03) (1 x 10E8 cfu/ml) 10 g/l [SL] P/V
• TRICHODERMA ASPERELLUM (STRAIN ICC012) 2% + TRICHODERMA GAMSII (STRAIN ICC080) 2% (3 X 10E7 CFU/G (SUM OF BOTH MICROORGANISMS)) [WP] P/P
Recommendations
- Carry out regular inspections of plants to detect early symptoms of the disease.
- Implement crop rotation to reduce the accumulation of pathogens in the soil.
- Use mildew-resistant plant varieties when possible.
- Maintain adequate spacing between plants to improve air circulation and reduce humidity in the foliage.
- Apply preventive fungicides regularly during weather conditions favorable for the development of mildew.
- Avoid sprinkler irrigation that may favor the spread of spores.
- Remove and destroy infected plant remains to reduce sources of inoculum.
- Implement soil management practices, such as tillage, to bury infected plant remains and reduce oospore survival.
- Train workers in the recognition and management of mildew.
- Maintain detailed records of disease incidences to adjust management strategies.
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TREATMENTS
Homemade remedies
There are no home treatments
Natural allies
Chemical treatments
There are no treatments for this disease. Treatments are directed at the insect vectors that transmit it. See insect treatments.
RECOMMENDATIONS
- Check the back of the leaves frequently, especially in dry weather.
- Spray water on the leaves to increase humidity and prevent them from settling.
- Keep plants healthy with good watering and adequate light.
- If you see cobwebs or damage, clean the leaves with a damp cloth or pressurized water.
- Use potassium soap or neem oil every few days until they disappear.
REPELLENT PLANTS
Rosemary, Dill, Coriander
EFFECTIVE PRODUCTS TO ELIMINATE THIS PEST
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*Recommended treatments are still recommendations according to authority databases and in no way replace the guidelines established according to the legislation of each country.
*Products shown are recommendations and not our own products. As Amazon Associates, we earn revenue from purchases of recommended products.
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