Spraying milk on plants can kill insects. Because milk will solidify on the leaves, forming a layer of mucous membrane. Small pests such as red spider and aphid will be stuck by this layer of mucous membrane. When the milk is completely solidified, put it in the running water to wash it, and then the pests will be washed down.
First prepare a box of milk, then pour it into the watering can. Then spray it on the leaves where there are pests. Note that both sides of the leaf should be sprayed. If only the front side is sprayed, the pests on the back side may remain on the leaf.
After spraying the milk, put the plant in a cool and ventilated place and wait for a few hours to make the milk on its leaves coagulate. Finally, put the plant under the running water, you can wash away all the insects on the leaves.
