Prévention

Pear leaf blight, caused by the fungus Stemphylium vesicarium , remains a serious threat to growers. Mainly affecting orchards in southeastern France, this fungal disease has a significant impact on fruit quality and tree health. This article takes an in-depth look at the symptoms of this disease, best practices for prevention, and available treatments. Finally, we discuss a key solution for replacing lost plants and ensuring the continuity of your orchards thanks to Arboriverse, your specialist wholesaler of quality fruit plants.


Symptoms of Stemphyliosis

On the leaves

The first signs of Stemphyliosis usually appear after flowering. They appear as small, brownish necrotic spots that grow to cover a large portion of the leaf blade. These lesions interfere with photosynthesis, weakening the tree.

On fruits

Infected fruits show similar brown spots, often surrounded by a distinctive reddish halo. These lesions worsen to form scabs and depressions, rendering the fruits unmarketable, resulting in significant economic losses.


Conditions Favorable to the Development of the Disease

The fungus Stemphylium vesicarium thrives particularly well in warm, humid conditions, with temperatures between 20 and 26°C. These conditions are common in spring and summer in the south of France, making this region particularly vulnerable.

Aggravating factors:

  • Varietal sensitivity: Varieties such as Abbé Fétel and Conférence are particularly affected.
  • Grafts on quince: Chlorotic orchards grafted on quince are more sensitive.

Prevention of Stemphyliosis

Humidity management

Reducing humidity in the orchard is essential to limit the spread of the disease. Here are some effective measures:

  • Improve drainage to avoid areas of standing water.
  • Use localized irrigation such as drip irrigation instead of sprinklers.

Orchard maintenance

Rigorous tree maintenance helps reduce the risk of infection:

  • Collecting dead leaves to eliminate overwintering spores.
  • Regular size to promote better air circulation.
  • Crop rotations to reduce disease pressure.

Biological Treatments

Natural products

  • Sulfur treatments: Useful between flowering and harvest.
  • Plant purines: Nettle or horsetail extracts strengthen the natural defenses of trees.
  • Biopesticides based on Bacillus subtilis : This microorganism helps inhibit fungal growth.

Conventional Treatments

For crops grown in conventional agriculture, chemical fungicides are available:

  • Products based on Mancozeb or Dithianon for preventive and curative protection.
  • Treatment cycles adapted to periods of high risk (hot and humid climates).

Economic Impact and Importance of the Fight

Stemphyliosis causes significant losses for producers, both in quantity and quality. Damaged fruit cannot be sold, directly affecting farm profitability. Proactive and integrated orchard management is crucial to minimize these losses.


Commercial Solutions to Replace Your Pear Tree Plants

At Arboriverse, we understand the challenges growers face when dealing with diseases like stem rot. As a specialist wholesale supplier of fruit plants, we offer solutions to help growers restart their production.

Why choose Arboriverse?

  • Wide range of grafted pear trees: Half-stem, high-stem, or bare-root, adapted to your needs.
  • Professional quality guaranteed: Plants produced by specialized nurseries.
  • Competitive prices: Directly at producer price.
  • Fast and careful delivery: Throughout France.

Our commitments

  • Quote within 48 hours: Responsiveness to support you in your decisions.
  • Dedicated technical support: Personalized advice for managing your orchards.
  • Smooth supply: Uncomplicated logistics to receive your plants with complete peace of mind.

FAQ

What is the main cause of Stemphyliosis?

The disease is caused by the fungus Stemphylium vesicarium , which thrives in warm, humid conditions.

Which varieties are most susceptible to the disease?

The Abbé Fétel and Conférence pear trees are particularly vulnerable.

What are the recommended biological treatments?

Sulfur, plant manures, and biopesticides like Bacillus subtilis are the best options.

Can chemical fungicides be used?

Yes, products like Mancozeb are effective in conventional agriculture.

Why choose Arboriverse to replace your plants?

Arboriverse offers professional-quality plants at producer prices, delivered quickly and accompanied by technical advice.

How to order plants adapted to your needs?

Contact us for a free quote or explore our online catalog.


Plant or Relaunch Your Orchard with Arboriverse

Take advantage of our expertise and competitive prices to design or reestablish a productive and resilient orchard. Order your grafted pear plants now on our website or contact our team for personalized support.