Biology-Today.com

Monophagous Pests- are those insects which are known to feed on only a single species of plants. Tryporyza incertulus is a monophagous pest and attacks only on paddy plants. Oligophagous Pests- are insects confine their feeding activity to plants belonging to one taxonomic group i.e., one family. A well known example is the cabbage butterfly. [...]

An organism usually an animal, causing damage to man’s crops, animals or possessions, but in widest sense any animal or plant which harm or potent to cause damage to man, his animals, crops or possessions or even cause him annoyance, quality for the term pest. It is accepted that pest status is reached when there [...]