Rainy weather creates ideal conditions for both algae spot disease and scale insects. Before treating the algae spot, it’s important to eliminate the scale insects first, as they weaken the plant and make fungal and algal infections more severe.
Using Mr Ganick Scale Ex Lite, Mr Ganick Ultimite Concentrate, Mr Ganick Organic Nitro+, and Mr Ganick Organic Silwet as part of a structured treatment program helps restore plant health while reducing future outbreaks.
If left untreated, the combination of scale insects and algae spot can reduce photosynthesis, weaken branches, and increase the risk of secondary diseases.
Why do scale insects and algae spots increase during the rainy season?
The rainy season provides the perfect environment for both pests and diseases.
Scale insects feed by sucking sap from leaves and branches, reducing plant vigor and leaving behind honeydew that encourages the growth of algae and fungi.
At the same time, prolonged moisture and poor air circulation encourage algae spot disease, which appears as green, orange, or reddish circular spots on leaves and stems. Although algae spot rarely kills plants directly, severe infections reduce photosynthesis and overall plant performance.
Because scale insects weaken the plant first, controlling the pest population should always be the first priority.
Step 1: Intensive treatment for severe infestations
For heavy infestations, prepare the following spray mixture in 20 litres of water:
- Mr Ganick Scale Ex Lite – 40 ml
- Existing insecticide or Mr Ganick Ultimite Concentrate – 40 ml
- Mr Ganick Organic Nitro+ – 40 ml
- A fungicide such as Antracol (according to the label rate)
- Mr Ganick Organic Silwet – 10 ml
Spray once a week for three consecutive applications, ensuring complete coverage of both sides of the leaves, branches, and areas where scale insects are concentrated. Organic Silwet improves spray spreading and penetration, allowing the solution to reach hidden pests more effectively.
Find out more about Baba’s organic pesticide for plants you could use to treat your plants with care to minimise infestations.
Step 2: Reinforcement treatment
After the initial infestation is under control, continue strengthening the plant by reducing the dosage slightly.
Mix:
- Mr Ganick Scale Ex Lite – 30 ml
- Existing insecticide or Mr Ganick Ultimite Concentrate – 30 ml
- Mr Ganick Organic Nitro+ – 30 ml
- Fungicide
- Mr Ganick Organic Silwet – 10 ml
Spray once every 10 days for another three rounds. This stage helps prevent surviving insects from rebuilding their population while suppressing algae spot development.
Step 3: Long-term prevention
Once the plant has recovered, switch to a maintenance program using:
- Mr Ganick Scale Ex Lite – 20 ml
- Existing insecticide or Mr Ganick Ultimite Concentrate – 20 ml
- Mr Ganick Organic Nitro+ – 20 ml
- Fungicide
- Mr Ganick Organic Silwet – 10 ml
Apply the mixture every 10–14 days, particularly during wet weather. Regular preventive spraying helps protect new growth, reduces pest pressure, and minimizes disease recurrence.
Good orchard hygiene also plays an important role. Prune overcrowded branches to improve airflow, remove heavily infested plant parts, and avoid allowing moisture to remain on the canopy for long periods.
When scale insects and algae spot disease occur together, always control the scale insects first, as they weaken the plant and encourage further disease development.
A structured treatment program using Mr Ganick Scale Ex Lite, Mr Ganick Ultimite Concentrate, Mr Ganick Organic Nitro+, and Mr Ganick Organic Silwet, combined with proper fungicide use and regular maintenance, provides effective long-term protection throughout the rainy season.
Keep rainy-season pests and disease under control
Scale insects and algae spot can worsen quickly during prolonged wet weather, so consistent treatment and monitoring are essential.
Control the scale insects first, then follow a structured programme using Mr Ganick Scale Ex Lite, Mr Ganick Ultimite Concentrate, Mr Ganick Organic Nitro+ and Mr Ganick Organic Silwet together with an appropriate fungicide.
Improve airflow through regular pruning and continue preventive care throughout the rainy season.
Start treatment early with Baba gardening supplier to protect new growth and keep your plants healthier through wet weather.
