7 plants that can be used to make homemade botanical pesticides
7 plants that can be used to make homemade botanical pesticides
(Nongye Zhifu Wang) Mulberry leaves: add 5 times their volume of water and boil down to a stock solution; for every 0.5 kg of stock solution add 2 kg of water, or spray with a 10-times-water soak of mulberry leaves; this can control cotton aphids and red spider mites. A 15-times-water soak of mulberry leaves can inhibit the germination of wheat rust summer spores.
Garlic stems and leaves: cut the stems and leaves, with the bulbs removed, into 6-7 cm small pieces and scatter them in early rice fields to let them rot. The allicin contained in garlic bulbs can reduce the occurrence of pests and diseases and cut down the number of sprayings. If the chopped garlic leaves and stems can be worked into the field before ploughing, the disease and pest control lasts longer and the effect is better.
Castor leaves: grind dried castor leaves into a fine powder and mix it in a certain proportion into farmyard manure to spread on the field; this can control underground pests such as white grubs, mole crickets and cutworms. Soak 1 kg of castor leaf powder in 16-20 kg of water, then pour it on with a watering can to control root maggots, cabbage caterpillars and insect-eating pupae on spring onions, chives, garlic, radish and Chinese cabbage. Castor leaf powder can also be made into a leachate and poured into latrines, pigsties, manure pits and similar places, with a clear effect on killing mosquito larvae and fly maggots.
Masson pine: add 5 kg of boiling water to 5 kg of Masson pine, soak in a sealed container for 2 hours, filter and spray; this can control rice leafhoppers and rice planthoppers. A 30-times-water soak of pine needles can inhibit the germination of potato blight spores.
Chinese arborvitae leaves: crush them, add an equal amount of water and rub them, squeeze out the stock solution, then add 2 times the water and spray; this can control cotton aphids and stem borers. A 10-times-water soak of Chinese arborvitae leaves has a significant effect on controlling wheat rust.
Weeping willow leaves: mash them, add 3 times the water and soak for one day or boil for half an hour, then filter and spray; this can control cabbage caterpillars, aphids, stem borers and so on. A 5-times-water soak of willow leaves can inhibit wheat rust.
Fresh mugwort: chop it up, add 10 times the clean water, boil for half an hour, and spray after cooling; this can control cotton aphids, red spider mites and cabbage caterpillars.
All of the above homemade pesticides can be made into a stock solution and diluted when used, with the same effect.
Garlic stems and leaves: cut the stems and leaves, with the bulbs removed, into 6-7 cm small pieces and scatter them in early rice fields to let them rot. The allicin contained in garlic bulbs can reduce the occurrence of pests and diseases and cut down the number of sprayings. If the chopped garlic leaves and stems can be worked into the field before ploughing, the disease and pest control lasts longer and the effect is better.
Castor leaves: grind dried castor leaves into a fine powder and mix it in a certain proportion into farmyard manure to spread on the field; this can control underground pests such as white grubs, mole crickets and cutworms. Soak 1 kg of castor leaf powder in 16-20 kg of water, then pour it on with a watering can to control root maggots, cabbage caterpillars and insect-eating pupae on spring onions, chives, garlic, radish and Chinese cabbage. Castor leaf powder can also be made into a leachate and poured into latrines, pigsties, manure pits and similar places, with a clear effect on killing mosquito larvae and fly maggots.
Masson pine: add 5 kg of boiling water to 5 kg of Masson pine, soak in a sealed container for 2 hours, filter and spray; this can control rice leafhoppers and rice planthoppers. A 30-times-water soak of pine needles can inhibit the germination of potato blight spores.
Chinese arborvitae leaves: crush them, add an equal amount of water and rub them, squeeze out the stock solution, then add 2 times the water and spray; this can control cotton aphids and stem borers. A 10-times-water soak of Chinese arborvitae leaves has a significant effect on controlling wheat rust.
Weeping willow leaves: mash them, add 3 times the water and soak for one day or boil for half an hour, then filter and spray; this can control cabbage caterpillars, aphids, stem borers and so on. A 5-times-water soak of willow leaves can inhibit wheat rust.
Fresh mugwort: chop it up, add 10 times the clean water, boil for half an hour, and spray after cooling; this can control cotton aphids, red spider mites and cabbage caterpillars.
All of the above homemade pesticides can be made into a stock solution and diluted when used, with the same effect.