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How to recognize and combat rust in blueberries
Rust
Fungus
Type:
Risk to the plant:
HIGH
Naohidemyces Vacciniorum
Pathogen:
Royas
WHO CAUSES IT?
Naohidemyces vacciniorum is a fungus that causes the disease known as rust in blueberries. This pathogen is an obligate biotroph, meaning it depends on a living host to complete its cycle. Its development begins when the spores, known as uredospores, land on the surface of the leaf and germinate in the presence of free water. The hyphae of the fungus penetrate plant tissues through the stomata and develop internally, forming specialized structures that absorb nutrients from the plant. As the fungus establishes, it produces new spores that emerge through lesions on the leaf, ready to be dispersed by wind or water to other susceptible plants. This process can be repeated several times during the growing season, allowing the fungus to spread quickly and cause severe infections if left unchecked.
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SYMPTOMS
The rust caused by Naohidemyces vacciniorum severely affects blueberries, weakening the plants and significantly reducing their productivity. The fungus mainly infects the leaves, where it causes the appearance of Taches and pustules that affect photosynthesis and the general health of the plant.
- Yellow Taches on the upper surface of the leaves.
- Orange or reddish pustules on the underside of the leaves.
- Chlorosis and necrosis of affected leaves.
- Premature fall of leaves.
- Reduction in plant growth and vigor.
- Decrease in the production and quality of the fruits.
- Presence of spores in the growing environment.
DEVELOPMENT CONDITIONS
Temperature:
15-25°C
Humidity:
80-100%
HOW IS IT SPREAD?
Wind, irrigation water, contaminated pruning tools, direct contact between plants, workers' clothing and hands, vector insects
HOW TO ELIMINATE IT?
Home treatments
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.
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