Can spraying milk on potted plants help prevent red spider mites?
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This post was last edited by Desert Fish on 2017-5-13 at 18:53. When the weather gets hot, potted plants can be affected by red spider mites. It is said online that spraying milk can help control them; I tried it and noticed that the leaves became a bit shinier. But could milk affect the leaves’ respiration?
(1) For tobacco water, take 50 grams of tobacco leaves (if using tobacco stems, tobacco strips, or cigarettes, double the amount is required), add about 1500 grams of clean water, and soak for a day and night. During the soaking process, knead the mixture several times before removing it and filtering it. Add 0.1% neutral laundry detergent to the filtrate, stir well, and then it can be sprayed. Tobacco water can control pests such as aphids, red spiders, whiteflies, leafhoppers, thrips, stink bugs, and leafrollers. The main active ingredient in insecticides is nicotine
(2) Pyrethrum water: Pyrethrum has a strong contact killing effect on pests and a weak stomach poisoning effect. Grind the dried Chrysanthemum indicum into powder; take 50 grams of this powder, add 10–20 kilograms of water, stir and filter the mixture, then add a small amount of neutral laundry detergent. Mix well before spraying. The targets for prevention and control are basically the same as those for tobacco water
(7) Garlic water: Crush purple-skinned garlic to extract its juice, add 20–25 times as much water, stir well and filter. It should be sprayed immediately to control aphids, red spiders, scale insect nymphs, as well as diseases such as skin mold and root rot.
(8) Scallion water: Crush the outer skin and leaves of scallions, soak them in water at a ratio of 10 parts water to 1 part herbs for several hours, then filter the mixture and use it for spraying. This can prevent aphids and soft-bodied pests, as well as suppress the spread of powdery mildew
10) Sichuan pepper solution: Use 1 part of Sichuan pepper, add 5–10 times its amount of water to prepare a concentrated solution; after filtering, add about 10 times as much water and use it for spraying. This can help prevent and control aphids, whiteflies, leafhoppers, scale insect nymphs, stem borers, and other pests.
(9) Ginger water: Crush fresh ginger to extract its juice, then add about 20–25 times as much water and use it as a spray; this can prevent rot, sooty mold, and the germination of spores from other pathogens.
(3) Rotenone solution: Rotenone contains rotenone itself, which has a strong gastric and contact toxic effect on pests. Grind the rotenone into powder; take 50 grams of this powder, add 15–35 kilograms of water, then incorporate a small amount (about 0.1%) of neutral laundry detergent, mix well, and spray the mixture. It can control aphids, red spider mites, whiteflies, leafhoppers, planthoppers, tea caterpillars, geometrid moths, tussock moths, tiger moths, silver-lined moths, and beetles.
6) Castor water: Crush 50 grams of castor seeds, add 500 grams of water and soak for several hours. Add a small amount of neutral laundry detergent, then add 4–6 kilograms of water. Mix well, filter, and the resulting liquid can be used for spraying. It can control aphids, leafhoppers, beetles, weevils, and others. Drying castor leaves and stems, grinding them into powder and applying it to the soil can help control underground pests such as grubs