Microtubing or spaghetti tubing is a very fine plastic tubing used in drip irrigation, typically in gardens and greenhouses, with a small inside diameter which may be 0.05" or smaller.
By the 1960s, most greenhouse research and commercial operations used the drip pipe system with plastic mulch.
The smaller the diameter and the longer the tube, the greater the friction loss, thus reducing the pressure and flow.
Microtubing is one of the oldest products made for drip irrigation, having been manufactured for about fifty years.
The caterpillars of the moth had munched holes in the plastic tubing to penetrate the pipes and then pupate.