The control of forest insects: general considerations
Fourth level
Fifth level
FOOD
SUPPLY
Food supply
Food material is an important factor in bringing about the increase or decrease
of an insect species.
Many forest insects are capable of attacking and feeding upon healthy trees.
Other insects can only feed on deceased or damaged trees.
Food Supply
Mature Timber overmature, decadent and suppressed trees usually offer
susceptile material for barkbeetle attack.
Defoliated Trees trees that have stripped of their leaves by defoliating
insects.
Diseased Trees diseases that defoliate trees may render them susceptile to
the attacks of cambiumfeeding insects.
Lightingstruck Trees coniferous trees struck by lighting appear to be very
attractive to bark beetles.
Windfall and Snowbreak a number of severe epidemics of bark beetle can
be traced to windblown timber.
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