Is the water secreted by willow poisonous?

Willow is harmful to people, but it is harmless to people.

Cicada mainly harms willow trees, and adults lay eggs at the top of new buds or seedlings of willow trees, causing willow trees to wither, wither or grow long, which affects the growth of trees. One generation occurs every year, overwintering with eggs in the new shoots of that year. After the middle of April of the following year, the overwintering eggs began to hatch into nymphs. In late June, nymphs began to emerge as adults and leave the foam, and continued to feed on branches for one or two years. From the end of July to the beginning of August, adults began to mate, and then laid eggs on the upper branches of that year, and all the upper branches of the spawning ground withered and dried up. The liquid secreted by this insect will not cause harm to human body.