Using natural plant-based pesticides to protect tea plants from diseases and pests not only saves costs but also ensures that no harmful chemical residues remain in the tea, resulting in a high-quality product that is safe for consumers and environmentally friendly. Here are several effective methods using common plants:
Tartary buckwheat leaves: Take 2 kg of chopped buckwheat leaves and add 10 liters of water. Boil for one hour, then filter the liquid. Once cooled, mix with a 2% detergent solution and spray it 200 times. This mixture effectively controls pests like the tea moth, small green leafhopper, tea caterpillar, leaf roller, and various moths.
Maple leaves: Use 5 kg of chopped maple leaves, add a little water, crush them to extract the juice, then dilute the juice with 2 liters of water per kilogram of raw juice. This solution helps control tea worms, leaf rollers, tea caterpillars, and other similar pests.
Foliage leaves: Collect 2 kg of leaves, chop them, add 10 liters of water and 0.2 kg of salt. Boil for an hour, strain, and use the filtrate as a spray. It can prevent diseases such as anthracnose, sooty mold, leaf spot, and powdery mildew on tea plants.
Pine needles: Take 5 kg of chopped pine needles, add 25 liters of water, boil for one hour, and filter the liquid. Dilute with a 2% soap solution and spray 400 times. Apply once a week for three consecutive weeks. This treatment helps control diseases like tea feather disease, leaf blight, round spot, and algae spots, while also controlling pests such as tea caterpillars, worms, locust moths, and scale insects.
Paulownia leaves: Use 5 kg of fresh paulownia leaves, chop and crush them to extract the juice, then dilute with twice the volume of water. Add leachate from processed yellow tobacco parts (leaves, stems, pods, roots) and spray 200 times. This solution controls a wide range of pests, including tea thrips, small green leafhoppers, tea caterpillars, footworms, leaf rollers, moths, aphids, scale insects, whiteflies, and red spider mites.
Tobacco: Take 5 kg of tobacco roots, stems, leaves, pods, and waste materials (petioles and veins), chop them, and add 10 liters of water. Soak for two hours, then boil for an hour, and filter the sap. Dilute with 15 liters of water. This solution helps control tea pod borer, scale insects, and caterpillars. Watering the roots can also prevent root-knot nematode disease and kill larvae, earthworms, and grubs.
Tea dried cake: Burn the dried tea cake into charcoal, break it into pieces, and steep it in boiling water three times. Let it soak for four hours, filter, cool, and mix with a 2% detergent solution for 200 times spraying. This method kills red spider mites, tea thrips, small green leafhoppers, aphids, and other pests. Additionally, watering the roots helps prevent root-knot nematodes and eliminates ground beetles, earthworms, and grubs. The residue can also be used as organic fertilizer when mixed into dry soil.
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