Spring and early summer see a number of adult pest insects looking for good places to lay their eggs. When the eggs hatch and the young emerge as caterpillars, they have big appetites for fresh vegetables. This simple cover creates a physical barrier between the insect and the plants beneath, preventing the eggs from being laid in the first place. Avoid the ravages of Small White butterflies (cabbage moth), carrot rust flies, flea beetles, and several other undesirable insects. The VegTrug Insect Cover fits snugly over the Greenhouse Cover frame. It is available in two sizes for the VegTrug of your choice.