Takahashia japonica in Ticino: how to protect trees (cross-border guide)

Context

In brief

• Takahashia japonica attacks trees in Ticino
• Situation under control but requires attention
• Phytosanitary measures to contain the spread

Key facts

• What: Presence of Takahashia japonica on trees in Ticino
• When: Situation monitored by the cantonal phytosanitary service
• Where: Mainly in the Sottoceneri area
• Who: Cantonal phytosanitary service of the cantonal agriculture section
• Amount: Not specified

The cantonal authorities of Ticino have reassured that the situation regarding Takahashia japonica, a cottony filament scale insect, is not alarming as declared across the border. However, attention must be paid and adequate measures taken to contain the spread of this organism. Takahashia japonica, also known as the cottony filament scale insect, has been reported mainly in private gardens and some public green spaces, particularly in the Sottoceneri area. The most affected plants in our latitudes are mulberries, liquidambars, elms, and maples. Cristina Marazzi, head of the cantonal phytosanitary service, explained that these are isolated attacks and not a general alarm. However, it is important to act promptly to prevent further damage.

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Operational details

Practical Analysis

The Takahashia japonica represents a challenge for garden owners and those responsible for public green spaces in Ticino. The scale insect, with its cottony filaments, can cause significant damage to plants if not contained promptly. The phytosanitary measures recommended by the cantonal authorities are fundamental to prevent the spread of this organism. Among the most effective measures are winter treatment with paraffin oil and the use of ladybugs as natural allies. These interventions can be carried out by citizens, provided they follow the guidelines provided in the phytosanitary bulletins.

Comparison with the Previous Situation

Before the introduction of phytosanitary measures, Takahashia japonica could spread more easily, causing greater damage to plants. With the adoption of new measures, it is possible to contain the spread of the scale insect and protect the most susceptible plants. The cantonal authorities have emphasized the importance of acting promptly to prevent further damage. Citizens can contribute to this effort by following the provided guidelines and adopting the recommended measures.

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Key points

Concrete action

To contain the spread of Takahashia japonica, it is essential to follow the guidelines provided in the phytosanitary bulletins n°6/2026 and 16/2026, available on the website www.ti.ch/fitosanitario. Here is a step-by-step procedure to protect your plants:

1. Winter treatment: Apply a paraffin oil treatment during winter to prevent the spread of the scale insect. 2. Use of ladybugs: Introduce ladybugs as natural allies to combat Takahashia japonica. 3. Targeted pruning: By mid-May, remove affected branches through targeted pruning, maintaining a good balance of the plant. 4. Removal of egg sacs: Remove the egg sacs by brushing with soft tools. 5. Disposal of material: Dispose of the material resulting from these operations in urban solid waste and do not take it to a composting center.

Deadlines and procedures

Phytosanitary measures must be adopted promptly to prevent further damage to plants. It is important to follow the guidelines provided in the phytosanitary bulletins and act according to the indicated deadlines. Citizens can contribute to this effort by following the provided guidelines and adopting the recommended measures.

Useful tools

For further information and to consult the phytosanitary bulletins, visit the website www.ti.ch/fitosanitario. Additionally, you can use the cost calculator to assess the economic impact of the adopted phytosanitary measures. For those in need of assistance, it is possible to contact the Cantonal Phytosanitary Service of the Cantonal Agriculture Section.

Source: tio.ch