healthy garden with a wide range of plants will
attract many forms of wildlife including natural
predators such as birds, ladybirds, frogs and
toads. Their presence will help maintain a naturally
balanced environment and the need for artificial
pest control will be kept to the minimum. Regular
hoeing between plants will not only control annual
weeds, but bring many pests to the surface where
birds can deal with them. There are products available
whose effect is specifically directed to a single
problem or plant, or that are non-persistent –
they remain active only for a short period. Many
of these are derived from plants, and have a less
damaging effect on the environment as a whole
than all-embracing chemical fertilisers, pesticides
are 1/6 in long and black-brown. They often gather
on willow catkins, and eat scale insects, capsid
bugs, caterpillars and midges.
BIRDS may reduce
your crop of autumn berries, but will help control
grubs, snails, slugs, caterpillars and aphids.
sometimes shelter beneath ground cover during
the day, but at night prey upon many small insects
including Bordeaux and Burgundy mixtures, remain
effective for several weeks as a control against
mildews and blights, but appear to be harmless
to many beneficial insects.
DERRIS is a non-persistent
plant extract used to fight caterpillars and aphids.
It is toxic to the eggs of some ladybirds and
adult lacewings, and harmful to fish, so should
be used with discretion.
FROGS AND TOADS
will keep the slug population at bay, and also
eat woodlice. A garden pond will provide breeding
facilities for them.
like damp, sheltered conditions during the day,
but emerge at night to hunt out eelworms, leather-jackets,
larvae and insect eggs.
leave their shelter beneath hedges or a pile of
logs at night to forage for slugs, cutworms, wireworms,
woodlice and millipedes.
HOVER FLIES are
thin, wasp-like insects, and lay their eggs on
aphid colonies. The larvae have voracious appetites:
one larva kept in captivity was recorded as eating
around 900 aphids in its lifetime. French marigolds
(Tagetes and Calendula species) attract hover
is a potassium-based product effective for only
one day, but a direct hit kills aphids, red spider
mites, white flies, scale insects and mealy bugs.
larvae which suck the body fluids from aphids.
If all the larvae produced from just one female
survived, they could consume 20 million aphids
in a season.
LADYBIRDS, in both
adult and larval stages, feed on aphids, scale
insects, mealy bugs, thrips and mites.
PYRETHRUM and ROTENONE should
be carefully directed at pests such as aphids.
Extracted from the flowers of certain chrysanthemum
species, they are harmful to some beneficial insects,
but are non-persistent and harmless to animals.
small caterpillars and aphids, but does not harm
bees, ladybirds or the anthcoris bug. It is sold
in chip form, simmered with water and strained
directory of common garden pests and diseases