Archive for the ‘bees’ Category

Beneficial Insects and Birds that Eat Insect Pests

Wednesday, June 3rd, 2009

Earlier this week I got a call from a woman looking to buy “aphid eating bees”. I suggested she hang a hot dog out by her aphid-infested plants to attract Yellow Jackets. She didn’t like that idea very much. Apparently, someone at a garden show years ago had sold her “nice bees” that eat aphids. When she described what she bought, it sounded a lot like she’d been sold Orchard Mason Bees. I don’t think they eat aphids, but please correct me if I’m wrong here readers. I’ve seen posts mentioning “aphid bees”, but I have yet to find any real detail on them.

Anyway, back to the ones that do eat aphids and other pest insects — Yellow Jackets and Bald Faced Hornets are notorious meat eaters. They’ll snatch up aphids and clean your plants beautifully. Just steer clear so they don’t come after you. Yes, Yellow Jackets are mean. But, Bald Faced Hornets would rather go about their business than chase you around the garden. Stay away from their nests and don’t swat at them, and odds are they’ll leave you alone. Yellow Jackets on the other hand might just chase you for their own personal amusement.

Hummingbird hovering over Waterfeature

Hummingbird hovering over Waterfeature

That being said, I was thrilled to find a big, fat Yellow Jacket hiding under my floating row cover just above the cabbages and cauliflowers that have been munched on my cabbage worms over the last few days. I’m not sure why s/he decided to plant herself there, but I’m hoping she’s on guard for worm hatches. This morning, I found no new worms and no new worm damage in the bed. Fortunately, when I peeled back the fleecy row cover, I didn’t manage to touch the Yellow Jacket. She stayed put as I gently draped the cover back over the beds after working. Hopefully, she’s my new pest guard and will make my worm picking work easier.

Not interested in attracting Yellow Jackets or Bald Faced Hornets to your garden to help battle pests? Try creating a Hummingbird-friendly space. I’ve caught them harvesting aphids in my garden more than once, and generally they’re pretty nice. They can be territorial and may dive-bomb you, but that’s pretty rare in my garden. Too, attracting wrens, nuthatches, titmice, and other birds will help keep down pest problems from aphids to mosquitos to root-eating grubs to all sorts of other non-beneficial insects we gardeners love to hate.

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New Report on Old Pesticides Harming Wildlife

Tuesday, April 21st, 2009

This just in: Biologists are naming 3 pesticides as harmful salmon including carbaryl, carbofuran and methomyl. This is in addition to three others named late last year:  malathion, diazinon and chlorpyrifos.

Carbaryl is also known by the trade name Sevin, which also harms bees as discussed here.  It, as well as malathion,  is also contained in other products as I found out last year when a reader asked me to look into Bonide Tree Fruit spray.  Carbaryl also makes an appearance in lawn care products.

Read more here about this study, the pesticides, the implications, the changes and recommended practices to help keep salmon (among other wildlife) safe.

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Why are Bees Disappearing & What Can We Do to Help Their Populations?

Friday, November 7th, 2008
Danty Heuchera is a Tasty Treat

Danty Heuchera is a Tasty Treat

Anyone in tune with popular media has heard that bee populations are dieing out and have been in decline for several years. In my own very diverse garden I’ve noticed a huge decline in honeybees. I use no pesticides, and I provide a diverse array of food sources for all bees. Still, this year my carpet of blooming thyme is visited by just a few bees at a time and the usual incessant buzz is nearly silent this year. Despite knowing that the bees are in decline, most still wonder why this is happening. There are several theories to choose from. I’m sure there are more theories than those I’ll discuss, and I look forward to learning more from your input into this discussion.

Colony collapse disorder is the term used to describe the losses where suddenly all of the worker bees just take off, abandoning the hive – baby bees and all. But why and where are they collapsing to?

  • Dead beat dads: Some will say the bees are just stressed out and can’t take it – kind of like a deadbeat dad that hits the road. But all the dads leaving all at once?
  • A fungus among us: When adult bees are infected with disease, such as gut fungi, they will fly away to die alone in order to save the hive. The question is, why is the entire hive flying away rather than just one bee at a time?
  • Vampire attacks: Yes, I said it. Vampires, well vampire-like mites that suck the life out of a bee are infecting hives. But these have been around for 30+ years in the U.S. and predate the huge population declines we’re now seeing.
  • A Pesticide by any other name is still a pest: Sevin, aka Carbaryl, is out there, and it is killing bees. It’s actually been killing bees since it was introduced in 1958. Maybe it’s reached levels that are contributing to colony collapse disorder, maybe not. And, yes, there are other pesticides that kill bees.
  • Flowers aren’t as fragrant as they used to be: Earlier this year a UVA study introduced a new theory – that pollution is contributing to reduced fragrance paths for the bees to follow. So, if the bees are confused or just can’t find food near their home, maybe they’re hitting to road to a new location where they can find food?
Resting in the Campanula

Resting in the Campanula

Well, if the scientists dedicated to this problem haven’t figured out why the beehives are collapsing and why the bee populations are in serious decline then certainly I can’t give you the answer. Still, what I can do is give you some ideas to help us work together to repopulate our bee communities:

  • Take up bee keeping: If you live in an outlying area, think about starting up hives of your own. You’ll bring in bee populations, have a wonderfully pollinated garden, be able to study how the hive performs and have honey galore from your own local source.
  • Leave off the pesticides: Practice integrated pest management (IPM) and think before you apply a chemical to your home or garden. Products like Sevin are sold as harmless despite continued research exposing them as toxic to humans. And, read the labels on all pesticides. Trade names may change despite keeping ingredients the same. Sevin is, after all, Carbaryl in sheep’s clothing. Oh, and one more note on these pesticides. Realize that when you kill off predators like wasps, hornets and yellow jackets, you are disturbing natural ecosystems. The beneficial predators (aka wasps, etc.) take longer to repopulate than the pests (aphids, cabbage loopers, tent caterpillars, etc..). Once you’re out of balance; it can be hard to get back into balance.
  • Plant diversity: By providing a wide array of blooming plant materials you will give the beneficial insects the food sources they need to keep their populations high and our gardens blooming for generations to come. Remember: If the bees aren’t here to pollinate the flowers, then our plants die. If our plants die, so will we.
Kent Beauty Oregano Visited By Honeybee

Kent Beauty Oregano Visited By Honeybee

Following are some great plants and planting ideas to incorporate in your garden for the bees:

  • Fruit trees: These bloom early in spring as the orchard mason bees come out briefly. Orchard mason bees are non-aggressive, small black bees that love orchard fruits. It’s not unlikely for you to miss them during their brief active cycle in spring.
  • Herbs: Bumble bees and honeybees alike love herbs like thyme, oregano, rosemary, lavender and sage. Hey, and the hummingbirds love lavender and sage too!
  • Berries: Again, the bumblers and the honeybees vie for the chance to spread pollen from one blueberry to another. And raspberries? Well, I’m glad they all get pollinated and then set fruit. Ahead of fruit set, my canes are a-buzz for weeks!
  • Fruiting vegetables: I call them fruiting vegetables because I’m encouraging you to plant tomatoes, eggplants, squash, cucumbers, green beans, peppers and peas. These plants provide their fruit for us to eat – despite the fact that we call their fruit a vegetable! Bring in the food crops and bring in the honeybees.
  • Vegetative vegetables: These are the ones that produce leafy, stalky food that we love like cabbage heads and unbloomed broccoli bunches. And what if you get a cabbage looper worm? Well, if you’ve got parasitic wasps and yellow jackets cruising the garden, they’ll snatch’m up or lay an egg in them faster than the green crawly can fatten up. And, if you’ve got a chicken, robin, or house finch pecking around, she’ll thank you for the tasty snacks you brought home for them.

Hopefully, you’ve gotten the message that by providing a natural, pesticide-free habitat for bees and birds, particularly by planting edibles for yourself, you have the opportunity to create a complete ecosystem. The bees pollinate the plants. The wasps parasitize the pests. The birds pollinate the flowers and eat the pests. And you? Well, you benefit from a healthy planet and a garden that feeds you organically and locally.

For additional reading:

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UVA Study Reports Pollution Reduces Flower Fragrance & Bee Populations

Tuesday, June 10th, 2008

A fellow horty recently emailed me a link to the UVA newspaper  that reported earlier this spring that pollution is reducing the fragrance in flowers. In turn they have linked the reduction in flower fragrance to the diminishing populations of bees.

Unfortunately, the diminishing bee populations are becoming more and more apparent to me in my own little urban garden. Plants like rosemary, blueberries and rhododendrons that have, in past years, been swarmed with bees are visited this year by just a few intermittent buzzing bees. And, this year the honeybees are almost completely absent. Bumblebees are still finding me as are hover flies, but even they are fewer in number. And, so far, not one bald faced hornet has shown his glowing white and black face to me.

Yes, our spring has been unseasonably cold and wet, but we have had many hot days. Too, my greenhouse door is often open, and pollenators tend to head for the heat and flowers in it. A few yellow jackets, many flies, a couple of bumble bees and some parasitic wasps have made it in, but so far no honeybees. (Yes, some get caught on sticky traps and others just get confused in the ceiling, which is how I have an idea of what comes in. When I can I help them find their way out.)

What are your observations about bees and other pollenators this year and in years past?

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