ShadyGardens Blog

June 20, 2013

Pests in the Garden: How to fight them without Pesticides

Filed under: aphid, beetle, bug, caterpillar, control, garden, insect, Japanese, natural, pests, soap, worm — shadygardens @ 12:57 pm

While our gardens are full of bad insects that bite us and eat our plants, many of the bugs in our garden are not only helpful and beneficial but responsible for much of the food we eat. Many of our valuable pollinators are on the decline due to habitat loss and overuse of pesticides by both commercial farmers and home gardeners. Since pesticides cannot tell the difference between a good bug and a bad one, it is best to not use them at all. 


Yet, insects like aphids, Japanese beetles, and squash bugs can destroy a plant quickly. And fleas, ticks, and mosquitoes? In addition to those itchy bites, they carry diseases which can be fatal. What can we do? It depends on the insect really.


Here in our garden, we use a variety of different methods for insect control. We have chickens, ducks, and guineas that roam free-range throughout the day eating every bug they see. Since introducing chickens to our garden, we have seen a significant decrease in Japanese Beetle damage. Guineas love to eat ticks, I am told. And ducks just eat every bug within reach. Since I have read that geese eat snails, I am entertaining the thought of getting a goose for my garden. (Don’t tell my husband.)




Aphids will usually be taken care of by Ladybugs, if you haven’t killed them all with pesticides. If you don’t have a good Ladybug population, you can order them online from Gardens Alive. Be sure to follow their instructions when you release them. Its really the Ladybug larva that devours the most aphids.






If you can’t wait for the Ladybugs to do their job, use the safest insecticide you can, insecticidal soap. You can purchase it ready made or make your own (1 or 2 Tablespoons of pure liquid soap like Castile, not detergent, to 1 quart of water.) Spray on the undersides of leaves and only where you see aphids.



For Japanese Beetles, mix up a cup of soapy water and add a little vegetable oil. Take it outside and as you see a Japanese Beetle, knock it into the soapy water. The oil will prevent its being able to climb out. This is a good job for your little boy, if you have one.

For many plant pests like squash bugs and tomato hornworms, the best method of control is to simply pick them off by hand. Since I don’t like to touch bugs and caterpillars, I use my pruners to knock them off. You can then mash them, or if you have chickens, knock the bug on the ground for them to fight over. It’s been years since I’ve seen a grasshopper in the garden here. Our chickens used to fight over them. It was fun to watch.
For ticks and fleas, here is an excellent recipe for homemade repellent.



June 12, 2009

Beneficial Insects in Your Garden

When many people see an insect, the first impulse is to kill it. But not all insects are pests, and many are actually beneficial insects, meaning they do good things like eating harmful insects and pollinating flowers. When we use pesticides to control insect pests, we also kill the good bugs.

You probably already know Ladybugs or Lady Beetles are beneficial insects, feeding on aphids, scales, and mealybugs. But did you know that the larvae of ladybugs look like tiny little alligators and eat even more pests than their parents?

Lacewings are fragile-looking insects with delicate, lacy green or brown wings, large eyes, and long antennae. Their larvae feed on aphids, scales, mealybugs, whiteflies, and young caterpillars.

The Praying Mantis will eat almost any insect (yes, they will eat the good bugs too and will even eat each other!)

Parasitic Wasps are usually too small for you to see, but you might spot signs of their presence. If you find a crispy-looking brown, inflated aphid attached to a leaf, it was probably the victim of a parasitic wasp that laid its eggs in the aphid so its offspring would have something to eat when they hatched. You might also see caterpillars, cabbage loopers, or hornworms carrying around cocoons of developing wasps. Parasitic Wasps lay their eggs on the back of soft caterpillars so their young will have a convenient food source upon hatching. (Yuck!) It’s almost time to see the Tomato Hornworm eating up the leaves and even the green tomatoes on our tomato plants. The best control is to pick them off and destroy them, but if you see one with loads of small white things that look like clusters of rice, just leave it alone–the white things are eggs of the Parasitic Wasp!

Grandaddy Spiders, or you might call them Daddy Longlegs, eat aphids, mites, and other garden pests.

These are just a few of the many beneficial insects in our gardens. Beneficial insects can be purchased from mail-order sources, but you can attract them into your garden without purchasing them. The best way to attract these beneficial insects into your garden is to just plant more flowers and herbs!

June 17, 2008

Beneficial Insects in a Georgia Garden

When many people see an insect, the first impulse is to kill it. But not all insects are pests, and many are beneficial insects, meaning they do good things like eat harmful insects and pollinate flowers. When we use pesticides to control insect pests, we also kill the good bugs. You probably already know Ladybugs are beneficial insects, feeding on aphids, scales, and mealybugs. But did you know that the larvae of ladybugs look like tiny little alligators and eat even more pests than their parents? Lacewings are fragile-looking insects with delicate, lacy green or brown wings, large eyes, and long antennae. Their larvae feed on aphids, scales, mealybugs, whiteflies, and young caterpillars. The Praying Mantis will eat almost any insect (yes, they will eat the good bugs too and will even eat each other!) Parasitic Wasps are usually too small for you to see, but you might spot signs of their presence. If you find a crispy-looking brown, inflated aphid attached to a leaf, it was probably the victim of a parasitic wasp that laid its eggs in the aphid so its offspring would have something to eat when they hatched. You might also see caterpillars, cabbage loopers or hornworms carrying around cocoons of developing wasps. Parasitic Wasps lay their eggs on the back of soft caterpillars so their young will have a convenient food source upon hatching. (Yuck!) It’s almost time to see the Tomato Hornworm eating up the leaves and even the green tomatoes on our tomato plants. The best control is to pick them off and destroy them, but if you see one with loads of small white things that look like clusters of rice, just leave it alone—the white things are eggs of the wasp. Granddaddy Spiders, or you might call them Daddy Longlegs, eat aphids, mites, and other garden pests. These are just a few of the many beneficial insects in our gardens. Beneficial insects can be purchased from mail-order sources, but you can attract them into your garden without purchasing them. The best way to attract these beneficial insects to your garden is to just plant more flowers and herbs!

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