тля

Noun

 * 1) aphid

Usage notes
The word тля is usually used in the singular as a collective noun.
 * Тля появи́лась — The aphids have come out.

Noun

 * 1) aphid
 * 2)  insect pests

Noun

 * 1)  gnat, insignificant person

Noun

 * 1)  decay