When we think gardening and insects, we normally think pest. And the best way to get rid of pests in the garden has generally been to use pesticides. Sadly, while many of the true garden pests have become completely resistant to pesticides and poisons that so many people use, the many beneficial gardening insects continue to perish when pesticides are used.
Why, you may be asking, are some insects beneficial? After all, aren’t they just bugs? The answer is: No, not at all. Beneficial insects are nature’s answer to pest control, and they are valued most in organic gardening and organic farming. It’s a kind of biocontrol – bug eats bug! And we get rid of the toxins that are slowly poisoning the world.
There are various reasons why we need certain insects in our gardens. This has resulted in us being able to categorize beneficial gardening insects (and related creatures) as:
- predators, and
10 Most Important Beneficial Insects for the Garden
Here is a list of the top ten beneficial garden insects, showing which category each ones falls into:
Honey bees that pollinate flowers.
Lady beetles (also called lady bugs, although in reality they aren’t bugs) that will guzzle aphids as well as mealy bugs, spider mites and several types of harmful larvae. The larvae of lady beetles will also feed on garden pests.
Ground beetles of various types feed on a wide number of insect types – usually at night. Most are dark brown and shiny.
Aggressive bugs like assassin bugs, damsel bugs and tiny pirate bugs all prey on spider mites, aphids, thrips, leafhoppers and various caterpillars. If there isn’t enough food to go around, they often eat one another.
Green lacewings, also called aphid lions, feed on similar pests to the aggressive bugs mentioned above, as well as nymphs and moth eggs. If there isn’t enough nectar and pollen in the garden for adult insects to feed on, they will move on.
Antlions, or doodlebugs, are the larvae of a clear-winged insect and they are related to green lacewings. They make funnel-shaped traps in the ground that insects (their prey) fall in to, which is when the antlions make their move.
Dragon flies are usually seen around water, particularly garden ponds and streams. Their main source of food seems to be mosquitoes and flies, which are more of a menace to man than to plants.
Wasps of various types, ranging from hornets to tiny little insects you probably don’t even notice, eat spiders. Some are parasites that lay their eggs on a host insect, and when the eggs hatch, the larvae eat their host.
Syrphid flies, also called flower flies or hover flies, look as if they have small yellow jackets making them easy to identify. Their larvae feed on aphids, young termites, as well as ants and even bees.
The praying mantis eats grasshoppers, flies, bees, crickets and wasps – and even their own kind.
In addition to these beneficial insects, spiders (which are eight-legged arthropods rather than insects) are great predators in the garden because they eat many different types of insect. Predatory mites, which are spider-like creatures, also consume some troublesome insects including flower and onion thrips.
How to Attract Beneficial Insects to Your Garden
The best way to attract beneficial insects and other favorable creatures to your garden is to provide them with whatever if it is they want, nectar and pollen for example.
There are also some plants that will attract beneficial insects and keep them returning to your garden, including several herbs – alfalfa, clover, coriander, calendula, yarrow, dill, parsley, fennel – as well as white sweet alyssum, candy tuft, black-eyed Susan, cosmos, and the Bishop’s flower. Of course if any of these are indigenous to the area in which you live, you’ve got a bonus.
Just remember that different plants will attract different insects. For example, honeybees will be attracted by bee balm, pineapple sage, parsley and even Queen Anne’s lace.
There are also proprietary food supply attractants that you can put onto a bird table in your garden, or products that you can spray on the foliage, to attract these beneficial creatures.
Beneficial Insects You Can Buy
Two of our presidents kept their own insectories to make sure that they always had the beneficial insects that would keep the pests away from the crops they were growing. They were George Washington, the first president of the United States of America, and Thomas Jefferson, the third president of the USA.
But today, you can buy many beneficial insects that are available at just the right time, to get rid of garden insect pests. Just be sure you really need them, otherwise they will move off to greener pastures so to speak.
Here is a list of some of the insects you can buy:
- Praying mantis
- Parasitic wasps
- Minute pirate bugs
- Lady beetles
- Green lacewing
- Golden chalcin
- Aphid midge
- Thrip predator bug
- Scale parasites
- Predatory mites