Aestivation: Dormancy during hot and drought periods.

Cuckoo-spit: Also called frog spit. A frothy secretion made on plants by the young of certain insects, such as the frog hoppers, to function as a protective covering.

Diapause: A state of arrested development, especially in immature insects, often occurring seasonally or when environmental conditions are unfavourable.

Elytra: Thickened or horny front wing.

Epithelium: A cellular tissue covering the body surface.

Gall: An abnormal growth of plant tissues caused by the stimulus of an animal or another plant.

Grub: Larva of beetles.

Heteroecism: The development of different stages of a (pest) species on different host plants.

Inquilinous: A condition in which an animal lives in the nest of another species.

Instar: A young insect in one of its growth periods between moults.

Light-trapping: Collecting insects at night using traps fitted with light

Mandibles: A paired mouth appendage, usually a set of grinding jaws found in chewing insects.

Nematode: Any unsegmented worm (roundworm).

Overwinter: To pass, spend or survive the winter.

Parasitize: The condition wherein one animal feeds on another living animal, often causing the death of the latter.

Photophobic: Having an aversion to light.

Phototaxis: Change in the response of an organism caused by light; generally, movement towards or away from light.

Phytophagous: Feeding on plants.

Polyphagous: Feeding on a variety of plants.

Protergum: The dorsal surface of the first body segment.

Prothorax: Anterior of the three thoracic segments.

Punctum: A depression.

Skeletonize: To reduce (a leaf) to a skeleton (by eating all the leaf tissues and leaving only leaf veins).

Sulci: Sutures formed by an enfolding of the body wall; plural of sulcus.

Suture: The junction or line of junction of adjacent parts.

Tubercle: A small, knob-like protuberance.

Verruca: A small, flat, wart-like prominence; plural ----verrucae.