If there are many small black flies around the flowers raised at home, you can buy a yellow armyworm board and hang it around the flowerpot. In a few days, these little black flies will fly to the armyworm board and be stuck by the armyworm board. At this time, remove the armyworm plate, and there will be no more small black flies around the flowerpot.
Tobacco water also has the effect of killing small black flies. Take a cigarette, tear off the outer layer of paper, take out the tobacco and put it into water for several days. Then pour the supernatant into clean water and dilute it slightly, and then put it into the spray pot and spray it around the plant. Spray once every few days, you can effectively kill the small black flies around the plant.
In addition to the above two methods, there is another way to solve the problem of small black flies, that is, to spread a thin layer of sand on the surface of flower soil. This can act as a barrier. On the one hand, it can prevent the small black flies from laying eggs on the surface of the flower soil and avoid more small black flies. On the other hand, you can suffocate the little black flying insects that are still in the flowerpot.
