Glossary

A glossary of technical terms used on this site.

Abdomen
the posterior of the three body divisions of an insect
a.i.
active ingredient
Alatae
winged forms
Apex (pl. Apices)
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Apterae
wingless forms
Bacillus thuringiensis
a spore forming bacterium which can be used to control certain insect pests especially caterpillars
Bait
usually poisoned foodstuff used to attract and kill insects
Caterpillar
larva of an insect belonging to the order Lepidoptera
Chemical control
control of insects with insecticides
Coleoptera
insect order containing beetles
Cultural control
control of insects by using farming methods which either destroy the insects or prevent rapid population growth
Dead heart

a symptom of insect damage in which the central shoot of the plant dies
Diapause
a period of dormancy during which the development of the insect is arrested
Diptera
insect order containing flies
Distal
near or towards the end of an appendage
Dust
an insecticide which is formulated to be used as a dry powder
e.c.
emulsifiable concentrate
Elytron
a thickened, leathery or hard front wing
Entomology
the study of insects
Entomophagous
feeding on insects
Family
a subdivision of an order, containing a group of related genera; family names always end in: idae
Genus
a group of closely related species; genus names are written with a capital and should be printed either in italics or underlined
Gramineae
a family of plants; grasses (including cereals)
Granule
particle of inert material which is mixed or impregnated with a pesticide
Grub
a thick bodies larva of a beetle with thoracic legs and a well developed head
Hatch
break out of the egg
Hemelytron
Front wing with a thickened basal part and a membranous tip
Hemiptera
insect order containing two suborders: Heteroptera and Homoptera
Heteroptera
suborder of Hemiptera: bugs
Homoptera
suborder of Hemiptera: cicadas, hoppers, psyllids, whiteflies, aphids and scale insects
Host
the plant on which an insect feeds
Hymenoptera
insect order containing bees, wasps and ants
Imago
the adult stage of an insect
Instar
the insect between two successive molts; the first instar is the larva which hatches from the egg
IPM
Integrated Pest Management
Isoptera
insect order containing termites
i.u.
international units; indicating the toxicity of the product
Larva
the immature stage between egg and pupa of insects with a complete metamorphosis
Leaf miner
an insect that lives between the lower and upper surface of a leaf feeding on the leaf cells
Lepidoptera
insect order containing butterflies and moths
Maggot
larva of Diptera; they are legless and do not have a distinct head capsule
Metamorphosis
a change in form during the development
Mine
tunnel inside a leaf
Nocturnal
active at night
Nymph
an immature stage of an insect that does not have a pupal stage
Order
a subdivision of a class containing a group of related families; the class Hexapoda (insects) contains about 30 different orders
Orthoptera
insect order containing grasshoppers and crickets
Ovipositor
the external genitalia of a female insect
Parasite
an animal that lives in or on the body of another living animal (the host) at least during a part of its life cycle; it feeds on the tissues of the host; entomophagous insect parasites usually kill their host in the end
Pest insect
an insect causing damage to man’s crops, domestic animals or possessions
Phytophagous
feeding on plants
Posterior
hind or rear
Predator
an animal that attacks and feeds on other animals (the prey); the prey is killed and usually mostly or entirely eaten
Proleg
a fleshy abdominal leg of certain insect larvae
Pupa
the stage between larva and adult in insect with a complete metamorphosis; it is a non feeding and usually inactive stage
Seed dressing
seed treatment; mixing seed before sowing with a protectant chemical, often a combination of an insecticide and a fungicide
Siphunculi
a pair of dorsal tube like structures on the posterior part of the body of aphids
s.p.
soluble powder
Species
a group of individuals having some common characteristics which are able to breed with each other but not with other groups of individuals; division of a genus
Spiracle
breathing pore
Thorax
the body region behind the head which bears the legs and the wings
Thysanoptera
insect order containing thrips
Tillering
producing shoots from the lower part of the plant
u.l.v. (or ulv)
ultra low volume
Vector
an insect which is able to transmit viruses or other pathogens
Window
a small hole in the leaf with one epidermis left intact
Wingspan
the measurement across the wings when they are extended
w.p.
wettable powder
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