Insect Wing Anatomy

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Questions and Answers

What type of wings are developed fully only in the adult?

Both a and c

Functional wings (correct)

Legs

Cuticular projections

What supports the flaplike cuticular projections of wings?

Nerve fibres

Sclerotized veins (correct)

Tracheae

Transverse struts

What comprises the closely appressed dorsal and ventral cuticular surfaces of wings?

Nerve fibres

Blood vessels

Major veins

Intervening membranous areas (correct)

Where do most veins lie in an anterior area of the wing?

Remigium Signup and view all the answers

What is responsible for most of the movements of flight?

Thoracic flight muscles Signup and view all the answers

What configuration do the major veins have near the wing attachment?

<ul> <li>and - signs</li> </ul> Signup and view all the answers

What is the external skeleton of insects called?

Exoskeleton Signup and view all the answers

How are the hard plates (sclerites) on an insect's body joined to each other?

Via flexible membranes Signup and view all the answers

What forms a protective case around the insect, providing high tensile strength and guarding against mechanical injuries?

Tergum and sternum Signup and view all the answers

From which region of the insect arise the jointed appendages?

Sternopleural region Signup and view all the answers

What process has given rise to the familiar tagmata of head, thorax, and abdomen in insects?

Tagmosis Signup and view all the answers

How many segments do the head, thorax, and abdomen of an insect typically have as a result of tagmosis?

Six-segmented head, three-segmented thorax, and 11-segmented abdomen Signup and view all the answers

Where does the Red banded thrips lay their eggs?

On the upper leaf surface in a long chain Signup and view all the answers

What is the recommended method of control for Citrus swallow tail butterfly larvae?

Physical control by removing eggs and larvae Signup and view all the answers

Which pest transmits the African cassava mosaic virus?

Whiteflies Signup and view all the answers

What is a common behavior of the Red banded thrips larvae?

Feeding inside the underside surface of leaves Signup and view all the answers

How do Coffee leaf rollers affect plants?

By reducing leaf productivity Signup and view all the answers

What is a method suggested for controlling Citrus swallow tail butterfly infestations?

Scouting for pests to detect early infestations Signup and view all the answers

What is one of the serious problems that developed due to the use of chemicals in pest control?

Pests developing resistance to chemicals Signup and view all the answers

How do larvae of Maize borers cause damage to maize plants?

They eat the leaves and stem, causing the growing points to die Signup and view all the answers

What is one method of controlling Maize borers mentioned in the text?

Applying chemical control like Carbaryl or Carbofuran Signup and view all the answers

Which pest is a vector of streak disease in maize according to the text?

Maize leaf hopper - Cicadulina spp Signup and view all the answers

What do adult weevils and larvae feed on according to the text?

Grains, reducing them to powder Signup and view all the answers

What is a consequence of adult females laying eggs in grains, as mentioned in the text?

Reduced grain quality due to pupation within grains Signup and view all the answers

What is the purpose of the hairy tongue in Lepidoptera mouthparts?

To aid in pumping liquid food Signup and view all the answers

What causes the movement of liquid towards the mouth in Lepidoptera feeding?

Action of the cibarial pump Signup and view all the answers

How do moths and butterflies extend their proboscis?

By increases in hemolymph pressure Signup and view all the answers

Which type of mouthparts do most adult Lepidoptera possess?

Haustellate type Signup and view all the answers

What is the function of sectorial (haustellate) mouthparts in Lepidoptera and some adult flies?

To suck up liquids exclusively Signup and view all the answers

What causes tight coiling of the proboscis in moths and butterflies?

Contraction of intrinsic muscles Signup and view all the answers

Study Notes

Wing Development

Adult insects develop wings fully.
The flaplike cuticular projections of wings are supported by veins.
The closely appressed dorsal and ventral cuticular surfaces of wings comprise a thin layer of cuticle.
Most veins lie in an anterior area of the wing.
The thoracic muscles are responsible for most of the movements of flight.
The major wing veins have a configuration near the wing attachment that is consistent for a given insect order.

Insect Anatomy

The external skeleton of insects is called the exoskeleton.
Hard plates called sclerites, on an insect's body, are joined to each other by flexible membranes.
The exoskeleton forms a protective case around the insect, providing high tensile strength and guarding against mechanical injuries.
Jointed appendages arise from the insect's thorax.
The familiar tagmata of head, thorax, and abdomen in insects have arisen through the process of tagmosis.
As a result of tagmosis, the head, thorax, and abdomen of an insect typically have 6, 3, and 11 segments, respectively.

Agricultural Pests

Red banded thrips lay their eggs in the leaves and flowers of plants.
The recommended method of control for Citrus swallow tail butterfly larvae is the use of biological control agents and handpicking.
The African cassava mosaic virus is transmitted by the whitefly.
Red banded thrips larvae exhibit a common behavior of feeding on leaves and flowers.
Coffee leaf rollers damage plants by rolling their leaves, which impedes photosynthesis.
Citrus swallow tail butterfly infestations can be controlled by planting resistant varieties and using insecticides.
One of the serious problems that developed due to the use of chemicals in pest control is the development of resistance in pests.
Maize borer larvae cause damage to maize plants by tunneling into the stem and ears.
One method of controlling Maize borers mentioned in the text is the application of insecticides.
Streak disease in maize is vectored by the maize stem borer.
Adult weevils and larvae feed on grains.
Adult females laying eggs in grains can lead to the destruction of stored grains.

Mouthparts

The hairy tongue in Lepidoptera mouthparts serves to collect nectar.
The movement of liquid towards the mouth in Lepidoptera feeding is caused by capillary action.
Moths and butterflies extend their proboscis by blood pressure.
Most adult Lepidoptera possess a proboscis, which functions as a sucking mouthpart.
Sectorial (haustellate) mouthparts function in Lepidoptera and some adult flies for both sucking and lapping.
The tight coiling of the proboscis in moths and butterflies is caused by the elasticity of the cuticle.

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Description

Learn about the anatomy of insect wings, including their development, structure, and major veins. Understand how the longitudinal and cross-veins contribute to the overall structure of insect wings.