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Khapra beetle

Key features

The adult is an oval beetle, approximately 2-3 mm long.


The larvae are hairy, like those of all dermestids, and are 2.5 mm long when fully grown.



Biology

This species requires a high temperature for optimum development.


At 38°c, the life cycle may be completed in less than a month.


Each female lays 40 to 130 eggs.


Adults do not feed and only live for a couple of weeks.


In common with other insects, development times are influenced by temperature, relative humidity, moisture content, quantity and quality of the food. The following figures are therefore only a guide.


Number of days spent as:

50% RH, 30°c:

Egg........................................6.5

Larva.....................................24-30

Pupa......................................4.5

Adult cocoon........................2


50%RH,25°c:

Egg.......................................9.5

Larva....................................38-47

Pupa.....................................6

Adult cocoon.......................3


Larvae are able to withstand adverse conditions by entering diapause, sometimes for several years.


Distribution

This beetle originated in India but has now spread to most parts of the world.


Significance

It is a serious pest of cereals, cereal products, ground nuts, oilseed products and pulses. It is also a common pest of maltings.


Contact with the larval hairs may cause skin irritation.


Control

Please call East Lancashire Pest Control on 0800 023 6116


Adults do not feed and only live for a couple of weeks.


In common with other insects, development times are influenced by temperature, relative humidity, moisture content, quantity and quality of the food. The following figures are therefore only a guide.


Number of days spent as:

50% RH, 30°c:

Egg........................................6.5

Larva.....................................24-30

Pupa......................................4.5

Adult cocoon........................2


50%RH,25°c:

Egg.......................................9.5

Larva....................................38-47

Pupa.....................................6

Adult cocoon.......................3


Larvae are able to withstand adverse conditions by entering diapause, sometimes for several years.


Distribution

This beetle originated in India but has now spread to most parts of the world.


Significance


Egg........................................6.5

Larva.....................................24-30

Pupa......................................4.5

Adult cocoon........................2


50%RH,25°c:

Egg.......................................9.5

Larva....................................38-47

Pupa.....................................6

Adult cocoon.......................3


Larvae are able to withstand adverse conditions by entering diapause, sometimes for several years.


Distribution

This beetle originated in India but has now spread to most parts of the world.


Significance

It is a serious pest of cereals, cereal products, ground nuts, oilseed products and pulses. It is also a common pest of maltings.


Contact with the larval hairs may cause skin irritation.


Control

Please call East Lancashire Pest Control  on 0800 023 6116