The green leafy plants at home are sick. What should I do if they are covered with white spots?

Maybe there are scale insects on plants.

Treatment:

Method 1: If there are scale insects on individual leaves or branches, they can be lightly brushed with a soft brush or combined with pruning to cut off the insect leaves and branches. Brush it clean, cut it clean, burn it centrally, and don't throw it around.

Method 2: Soak cotton balls in vinegar or alcohol, and gently rub them on damaged stems and leaves to kill scale insects.

Scale insects are an important pest on citrus and grapefruit, and the common ones are Hemistichopus rubra, Hemistichopus fusca, Hemistichopus kangensis, Echinococcus and Hemistichopus. Scale insects harm leaves, branches and fruits. Scale insects are often male, have wings and can fly. Once female insects and larvae emerge, they feed on branches and leaves or fruits all their lives, resulting in yellowing of leaves, withering of branches and leaves, and decline of tree potential, which is easy to induce soot disease.

After the sap began to flow out in early spring, scale insects began to feed. After the female adult lays eggs, it can hatch a mobile insect without waxy scales in a few days, which is a newly hatched larva. Larvae crawls on ornamental plants. After finding a suitable place, they pierce their mouthparts into flowers and trees, suck the juice, and start a fixed life, which makes the host plants lose nutrition and lose a lot of water.