Pest
Control
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back to Plants The word 'pests' can cover insects, birds,
rodents, slugs and snails, diseases, weeds, in fact anything that causes a
nuisance to you and your garden. Here we will cover 'animal' pests.
Pests can be controlled with
chemicals or by using natural methods. You can encourage natural predators to
your garden, use companion planting to deter certain pests, use resistant
varieties of plants and practice good crop rotation.
Pests There are many
types of pests that are troublesome to gardeners. Rather than giving details on
each individual pest, we shall categorise them as follows.
Flying
Insects Greenfly, whitefly, aphids and other flying insects can be
controlled by a number of methods. Where possible use a physical barrier such
as a plastic covered cloche or fleece to prevent these insects reaching your
plants. There are a number of traps available which attract the insects then
trap them on a sticky surface, similar to fly papers. Also available are
parasitic predators, these often come as a larvae which you mix with water and
spray onto plants. The growing larvae prey on certain pest insects but do not
harm your plants. Companion planting can be useful when growing carrots, plant
rows of carrots between rows of taller plants or marigolds. The smell of
marigolds seems to deter carrot fly. There are a number of organic 'chemicals'
that can be used to control insects, a dilute wash of washing liquid works well
for small infestations.
Crawling
Insects Generally easier to see and easier to take action. Again use
traps, pots filled with straw for earwigs, hand pick caterpillars off leaves
and encourage birds to your garden. Use a sticky grease band around tree trunks
and greenhouse table legs. Be careful! many crawling insects such as spiders
and beetles can be beneficial, catching and feeding on other insects. Ground
beetles can even kill slugs.
Ladybirds DEFINITELY
NOT A PEST! Contrary to what some people think ladybirds are not pests and are
to be positively encouraged. One of the best allies for the gardener. Ladybirds
will eat hundreds of insect pests and do no harm in your garden. Try and
encourage into your garden with a good variety of planting. The problem with
most chemical insecticides is that they are not selective in what they kill,
after a time of organic gardening, predatory insects will make chemicals
unnecessary.
Slugs and
Snails Probably the most hated garden pests (and rightly so). Snails and
particularly slugs can cause an enormous amount of damage in the garden. They
feed by grazing on seeds, shoots and leaves of plants. Once a seed or shoot has
been attacked by slugs the plant will usually die. We have seen fields of crops
decimated by slugs. Slugs are very prolific and hardy, they lay hundreds of
eggs and can lay dormant in the soil until conditions are right for them to
attack. Slugs and snails like warm, moist conditions. Activity will be more
evident in evenings and early morning. Use traps to catch them and then destroy
or feed to birds. A plastic bag pinned down to the ground, a slate or tile, an
upturned grapefruit half are all effective in attracting slugs and snails. Beer
traps buried in the ground can also help. Make your garden attractive to frogs
and toads, birds, hedgehogs and beetles. These all enjoy a meal of slugs. Avoid
lumpy seedbeds, keep them fine and firm to hinder their movement. Use a
physical barrier to keep slugs away from susceptible plants, crushed eggshells
placed in a 2"-3" band around the base of plants is very effective. Slug killer
pellets should only be used as a last resort and always look for organic
alternatives to chemical products.
Birds Whilst birds are
beneficial to the gardener they can also be a nuisance. Birds seem to
instinctively know where you have just planted some new seeds, cover new
sowings with twigs or a cloche, make a scarecrow for your vegetable patch
and hang old CD's from branches. Special 'humming' line can be used to make a
scary noise. All these methods can be used to great effect, although birds are
very clever and will soon get wise to what is and is not a threat to them. If
you have a big problem such as a flock of starlings roosting in your trees, you
will need to call in a professional pest controller.
Rabbits Very cute but
very destructive. Rabbits will eat just about anything, damage to vegetables
and plants can be tolerated to a certain extent (why don't they eat weeds?)
unfortunately rabbits love gnawing the bark on trees. This can be very
damaging, especially to young trees. The only sure way of keeping rabbits out
of the garden is to erect a proper rabbit proof fence. This will have to be
buried in the ground as well to prevent them burrowing under it. Having a dog
(particularly a Jack Russell) to keep chasing them away and it may catch some,
also the scent of a cat or dog will deter rabbits. Shooting is not recommended
unless you are an expert, it would be better to buy some rabbit cage traps and
bait them with sliced carrots, it sounds daft but it works, we have caught
hundreds of bunnies like this.
Foxes and Badgers Not a
really a common garden pest as badgers do like eating slugs and other grubs but
they can start to be a problem when they start digging up your borders. Badgers
also like to make a 'toilet' to mark their territory by digging a hole and
adding to it's contents every night, when it is full they will start another
one. The best way to drive them away is to get your dog or yourself to wee near
this toilet last thing at night! Pepper dust also works well but weeing is
cheaper!
Cats and Dogs Not yours
but your neighbours! A well trained dog will know that it must keep off the
garden, cats are not so obliging. A well fenced garden will keep unwanted dogs
out but cats are good climbers. There are various electronic scarers available
but their effectiveness is questionable. A deterrent liquid or gel works but
has to be replenished regularly. If you keep squirting cats with a water
pistol or garden hose they will get the hint eventually. People often
complain about the scorch marks caused by their own dogs urine. You can try and
dilute it and lessen the effects by pouring a bucket of water over the area
immediately after your dog has done it's business. But surely a few small brown
patches which soon recover can be tolerated for all the pleasure and
companionship your best friend gives you!
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