Showing posts with label beneficial insects. Show all posts
Showing posts with label beneficial insects. Show all posts

Thursday, April 15, 2010

Bee Happy


By now I'm sure anyone who's interested in gardening and raising a bit of their own food has heard about the plight of the honey bee. Since so much of our food supply depends on these little creatures as pollinators the fact that honey bees are disappearing at an alarming rate should have us all worried on many levels. But honey bees aren't the only bees who are good pollinators. In fact, honey bees aren't even native to this country. Some of the best pollinators don't live in hives or make honey. They're our own native mason bee, also known as the orchard bee. At first glance mason bees look like a small version of a honey bee, but they are very different from honey bees. Mason bees don't build hives, but instead look for holes in trees in which to raise their young. The female mason bee gathers pollen and places it inside a suitable hole. When she has enough she lays an egg, and then seals it off with a plug made of mud (hence the name "mason" bee). She then proceeds to gather more food, lay another egg, seal it off, and so-on until the hole is full. She then plugs the end with mud and starts all over again in a new hole. The eggs hatch and the young feed on the pollen she's provided for them during the summer, then pupate and over-winter in the holes. Come spring they emerge, males first, (who were deposited in the front sections of the hole) then later, the females. They mate, and then start the whole process over again.

Since mason bees don't make their own holes you can encourage them to nest close to your garden by providing suitable nesting holes for them. Many garden supply companies sell mason bee houses. You can also easily make one, and there are good instructions on how to do that here. You can also purchase mason bees, but you really shouldn't need to. As the saying goes, if you build it (or buy it), they will come. I put up my mason bee houses a little over a week ago, and the bees were using them immediately. (Actually they were using them before the houses were put up since I had them sitting on the porch!) You should put your bee house someplace with a bit of protection from rain and other nasty weather (if it doesn't have it's own roof built in), and if it can get morning sun, that's really optimal. You really don't need to worry about having the bees close to where you are. Unlike honey bees, mason bees aren't aggressive at all since they have no honey stores to protect. They can sting, but you pretty much have to squish one to get it to do so. As I was taking the pictures for this post the bees were actually hitting me since I was in their flight path to their nests, and I didn't get stung once. And they really are fascinating to watch as they go about their bee business.

So, if you're planning to grow anything that requires a bit of bee action, I'd really suggest making friends with some of our own orchard bees. They're some of the best friends a gardener can have!

Monday, March 30, 2009

Pretty with a Purpose


I love having flowers in amongst the vegetables.  They're like little surprises, splashes of beauty in the beds, and make me smile every time I visit the garden. But the flowers aren't there just for my enjoyment.  They have an important job to do, namely, to attract beneficial insects to the garden.  Anyone who's grown anything worth eating knows that there are hoards of other critters who'd be plenty willing to eat it!  It's amazing how the aphids find the fava beans every year, or how the bean beetles appear on the poor bean plants so fast that it seems like they just come with them! It's enough to make you want to reach for the industrial pesticides!  Well, . . . almost.  After all, isn't it those same nasty pesticides you're trying to avoid by growing your own veg? Before you start spraying, remember this: for each one of those insect pests munching on your vegetables there's another creature that wants to eat IT!  I remember last year I nearly reached for the pyrethrin spray to deal with the hundreds of aphids munching away on the fava beans. I'm glad I didn't because within a few days the lady bugs had moved in and made short work of the aphids.  And we had an amazing (and delicious) harvest of fava beans, no chemicals necessary! 

Nature is all about balance, and if your plants are healthy (from growing in good fertile soil) they can tolerate a few munches from the pests until the predators arrive.  The insect predators need more than just their prey insects as food however.  They also need pollen and nectar, which they get from flowers, and a water source. That's not a bird bath I have in the garden, it's a bug bath!  The stones are there so that the little guys can drink without falling in and drowning.  There are a couple of wonderful articles here and here that list many types of beneficial insects and the flowers that attract them. The flowers that I routinely add to my garden are lobelia (this is one of my absolute favorites flowers anyway), calendula (which are not only pretty, but edible!), marigolds (natural source of pyrethrin and great companion plant for tomatoes), poached egg plant, fennel, agastache, nasturtiums (also edible), gilia, and cosmos.  And the next time you reach down to pull out that dandelion, don't! Dandelions are really great early nectar sources for all kinds of insect friends, including honey bees!  There really is quite a selection of beautiful flowers you can grow in your garden to attract beneficial insects, so find a little bit of extra space in your vegetable plot for them.  You and your vegetables will be glad you did!