害人虫 — meaning in English

hài rén chóng

English meaning

bane noun A person or thing that causes constant trouble or ruin.
blight noun A plant disease, often caused by fungus, that causes rapid browning and death of leaves or stems.
flail noun An old farming tool with a short swinging stick attached to a handle, used to beat grain loose from its husks.
scourge noun A whip, especially one with several lashes, historically used to punish or torture.
thresher noun A farm machine that separates grain from the rest of the plant, now usually part of a combine harvester.

害人虫 is used for these senses in English:

bane (countable) A cause of misery or ruin.
blight (pathology, dated) A diseased condition of the face or skin; specifically, bleeding under the conjunctiva of the eye, a form of skin rash, or a palsy of the face due to cold.
flail A tool used for threshing, consisting of a long handle (handstock) with a shorter stick (swipple or swingle) attached with a short piece of chain, thong or similar material.
scourge A person or thing regarded as an agent of divine punishment.
thresher (agriculture, historical) A now-obsolete hand tool for threshing, also called a flail.

noun A plant disease, often caused by fungus, that causes rapid browning and death of leaves or stems.
noun Something that damages or holds back growth, development, or quality of life.
verb To damage or spoil the growth or development of something.