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Non-pollution prevention and treatment of orchid diseases and pests
In modern times, orchid pests and diseases are primarily managed using chemical pesticides. However, overuse of these chemicals can harm the plants and lead to resistance in pests, reducing their effectiveness over time. Additionally, pesticide use often causes environmental pollution and can even pose risks to humans and animals. In contrast, pollution-free methods for controlling orchid pests have been practiced for centuries and are gaining popularity today. These natural techniques are effective, cost-efficient, easy to implement, environmentally friendly, and free from harmful side effects. They are well worth trying. Below are some traditional, non-polluting remedies that have been shared among orchid enthusiasts.
**1. Tea Bran**
Tea bran, also known as tea seed cake, is a byproduct of tea oil extraction. It contains saponin and glycosides, which are alkaline when mixed with water. This makes it toxic to many pests. To use:
- Crush 1 part tea bran and soak it in 5 parts boiling water for a day and night. Pour the mixture around the pot to deter snails.
- Spray the tea bran solution on orchids to control aphids and red spider mites, achieving up to 90% effectiveness.
- Use the solution to drown crickets and earthworms. Some gardeners believe crickets help aerate the soil, while others see them as harmful. It’s up to you to decide based on your experience.
**2. Odorous Vegetables (Garlic, Onions, Green Onions, etc.)**
These vegetables have strong odors that repel or kill pests. For example:
- Crush 25g of garlic, mix with 10 liters of water, and spray to treat aphids, spider mites, and scale insects.
- Soak chopped green onions in water at a 1:30 ratio for a day, then spray regularly to control soft pests and powdery mildew.
- Mix ginger juice with water and spray to eliminate aphids.
- Combine amaranth juice with fresh water at a 1:60 ratio and spray twice daily to treat black spots.
- Soak chopped onions in water for 7 hours, then spray to manage red spider mites and aphids.
**3. Cigarette Butts**
Tobacco contains nicotine, which is toxic to pests. Take 20 used cigarette butts, mix with quicklime and water, filter, and dilute with 30 parts water. Spray this solution to eliminate ants and other soft-bodied insects.
**4. Washing Powder**
Detergent dissolves the waxy coating of scale insects and creates a foam that suffocates them. To use:
- Dilute a small amount of detergent in 1000 parts water to spray aphids, whiteflies, and spider mites.
- A 600-fold dilution can be applied every three days for three weeks to eliminate scale insects.
- Mix pig bile with water and add a bit of detergent to prevent bacterial infections. After spraying, rinse the leaves thoroughly.
**5. Alcohol**
Mix white spirit and water in a 1:2 ratio and spray orchids once a week for three weeks to control scale insects.
**6. Orange Peels**
Place citrus peels around the pot to keep ants away. Cut them into pieces and sprinkle on the soil surface without watering for a few days to treat aphids and scale insects.
**7. Brown Sugar**
Mix 1 part brown sugar with 100 parts boiled water, cool, and spray every three days for three times to treat downy mildew, powdery mildew, and leaf blight.
**8. Diesel**
Mix diesel with water at a 1:60 ratio, then dilute 100 times and spray to control scale insects.
**9. Wood Ash**
Soak plant ash in water at a 1:50 ratio for two days, then spray the solution to control aphids and provide potassium fertilizer.
**10. Vinegar**
Mix vinegar and water in a 1:8 ratio and spray the underside of leaves to treat scale insects. Increase acidity slightly if adults are present and spray every three days for three times. Vinegar also helps combat black spot, powdery mildew, and yellowing diseases.
These natural methods not only protect your orchids but also support a healthier environment. Many of these solutions are simple, affordable, and effective—perfect for both beginners and experienced growers. Give them a try and see how they work for your plants!