Archive for the ‘pests’ Category

It’s Raining, It’s Pouring. The Slug Population is Exploding!

Friday, May 28th, 2010
Sturdy Buttercrunch Lettuce Life Raft

Sturdy Buttercrunch Lettuce Life Raft

What a spring in Seattle. It’s almost June and the night temps are still struggling to find their way out of the 40s. And the rain – it just keeps pouring out of the sky. Last year this time, we were well on our way to a record streak of no rain. The mornings were bright and sunshiney, and summery crops were already starting to thrive while cool season ones were on their way out. What a difference a year makes!

Despite how much I would prefer to have warm sunshine, I try to remember the wet and cool isn’t always a bad thing. For instance, I haven’t yet turned on my irrigation and my beds are moist and well drained. And, my broccoli, chard, peas, cauliflower and cabbage are looking fantastic. On the other hand, there are many things that simply won’t thrive in these extended, wet, cool spring days.

Among the weather-weary: my cucumber and squash seeds are struggling to even germinate. The few cool-season-hardy tomatoes I braved setting out in the garden a few weeks ago are doing okay, but I wouldn’t call their growth fantastic. And, sadly, some of my garlic has rotted in the cold, saturated soils. And my butter lettuce, despite loving the weather, are suffering at the hands of an over-abundance of slugs.

Yep, it’s a slug year. So, what to do? When it rains consistently, slug baits don’t do an awful lot of good. They melt in the rain, so it makes for a lot of re-application. And, frankly, I don’t care how “safe” slug bait may be, I’m not really interested in putting it around my food crops. Plus, I have my suspicions that it simply aids in attracting these slimy pests to the exact area I’m trying to protect. Same deal for beer traps. Set up happy hour for them, and they will come.

So, what’s left to do? (more…)

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W(h)ining About USDA Quarantine Protocols

Monday, March 29th, 2010

Over the weekend I had wine-on-the-mind. My best friends were celebrating the release of their 2007 Domanico Cellars red wines; they’ve been making wine for several years now and are really coming into their own.

Domanico Cellars Wines at the Northwest Flower & Garden Show

Domanico Cellars Wines at the Northwest Flower & Garden Show

It’s exciting to see their success and to enjoy their fantastic wines. So, as I was sipping a glass of Domanico Cellars Le Monstre Cabernet and reading various articles online, I was captivated by the headline: Moth Forces Wine Country’s Secret Into the Open. Rut-ro! The horty in me knew right away that someone and something was up to no good.

The article essentially reports that a grape-eating moth has been imported from Europe to the Napa valley, likely by way of the growers themselves who may (or may not) have brought in infected vine cuttings, skirting USDA quarantine headaches in order to get the vines going rapidly. (There are also some more evil posits about this issue and some that simply imply human error; regardless, Lobesia botrana is now in Napa.)  Yep, somebody was probably breaking the rules, and the result is a destructive pest now threatens not only the vineyards of those who imported the cuttings but also the entire valley. And dare I say it?  Perhaps the entire west coast growing region including my treasured Domanico Cellars wines? As I savored my glass of cab and thought about my own plant sharing mistakes of years-gone-by, I suffered a pang of regret.

First off, let’s be clear. Pests, weeds and disease can make their way around the world without any help from human beings. Burr-forming weeds are designed to attach to fuzzy animals to ensure their seed is spread from one field to another; this trick of nature means my own dog has brought in more weeds than I care ever  to pull. Egg casings of beetles can easily get lodged in the sole of a work boot to travel from a garden in (say) Virginia to a garden in (say) Washington. Destructive fungal spores can affix to a work glove as we dig, only to move from an infested bed to the next one when that same glove touches it. Or, just about any of these can simply go blowin’ in the wind from one place to another.  So, sure, whether intended or not, nature happens. But, we do have quarantine protocols for a reason. This moth infestation illustrates why.

One Person's Trash is Another Person's Treasured Perennial?

One Person's Trash is Another Person's Treasured Perennial?

And, my ignorant beginnings mean I’m not guilt-free in this area. Years ago, before I knew better, I carried with me some iris that I thought my mother had cultivated from my grandmother’s garden. Sentimentality and a fragrant, easy-to-grow plant convinced me this was a must-have plant. A few years later, my mom visited and saw the iris in my garden. “Why the hell do you have that thing here?” she asked. Turns out, this bearded lovely was actually a plant my mother had gotten from the dump. It never grew in my grandmother’s garden. And, although not invasive, it is a prolific grower. My neighbors continue to tease me when I pull, divide and compost its many tubers each spring and fall. (So in a sense, I’m actually sending more of it on to a more modern kind of dump — the local composting facility.) And, although this plant may not be problematic, it’s true that I may have brought some pest or disease along with it in my travels. I don’t know, but it could have happened. And, truly, infestations of all kinds can happen each time I bring a new bag of soil or load of compost or even quarantine-cleared plant into my garden. It can happen each time I walk to and from various garden job sites. Life lives and spreads — whether we consider a lifeform a pest or not.

The reality is that plants that are imported across state or country lines may or may not actually go through inspection even when submitted to quarantine. There really are only a certain number of inspectors out there afterall. And, if the plants are inspected, they may not be inspected for every potential problem. And, even if they are inspected, a problem can be missed. Plus, let’s be realistic, we may not even know what every potential problem is, right? But, if we’re informed, as I am now, best to err on the side of safety. Think twice about doing as my grandmothers used to love to do  — don’t take a cutting for your own garden when traveling out of state or out of country. In today’s world, odds are you can easily order an inspected, cleared and hopefully clean version of that very same plant once you get home. It may not be free, but hopefully it is free of any added “non-bonus” lifeforms that won’t enhance your garden.

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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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Brassica Worm Pests and Pest Management

Tuesday, June 2nd, 2009

Cabbage Loopers, or maybe they’re Imported European Cabbage Worms, are back in my garden. Last year, I handpicked them vigilantly and didn’t sustain too much damage.  This year I kept my crops covered with plastic hooping when it was really cold and floating row cover now that it is warmer.

Protective Row Cover Pulled Back Revealing Pest and Edibles

Protective Row Cover Pulled Back Revealing Pest and Edibles

I’ve seen the white adult butterflies with their signature dotted wings flittering about my garden, looking for their favorite hosts (aka my cabbages and cauliflower).  I thought the defenses were up and the crops were secured. Then, I pulled back the floating row cover in one bed to do some weeding, seeding and crop inspection. And, dang, there were a couple of worms chomping away.  SQUISH! Now they’re gone and my organic veggies are barely damaged.

So, what’s the message? Well, if there’s any opening in the floating row cover, those egg-laying white wonders are going to get into the plants. In one bed, my row cover is tightly secured over hoops with no entry point available. In the infested bed, the row cover is somewhat secured but mostly just floating. That weak link in the chain of defense meant the invaders made their way in.

Now I’m checking daily (if not a couple times a day) for worms on my cabbages. And, the floating row cover is more secured in all areas.

The best part about picking off the worms? Seeing my cabbages starting to tighten up and form yummy purple balls and little buds of cauliflower beginning to appear amid the protective leaves. I think I might even harvest my first cabbage today. Not only will that make a tasty addition to my endless salads, but it will also open up a planting spot for one of my Butternut squashes that are ready to move out of the greenhouse and into the garden beds.

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Floating Row Cover are Multipurpose Summer Sheets for the Garden

Tuesday, April 21st, 2009
March Planted Brassicas in April

March Planted Brassicas in April

There are many reasons to cover our vegetable garden beds. We add hoop houses with plastic to increase heat, extend the growing season, ramp up edible production rates, and provide other protections as illustrated here.  But, for some crops and during the warmer times of year, when flying pests are looking for delicious spots to lay their eggs, something more lightweight and breathable makes sense. Floating row cover is the answer to these needs.

Floating row cover is a lightweight, partially opaque fabric that is used for a variety of reasons in the garden, including:

  • Retaining heat in young beds — but not as much as plastic.
  • Protecting plants like carrot and brassicas from flying insects. (The row cover keeps the insects from getting to the plants where they like to lay eggs and then lay waste to garden crops.)
  • Allowing some light and lots of sunshine into crops
  • Increasing airflow to the plants to reduce fungal disease problems
  • Keeping some pests, like the neighborhood cats & pecking birds, out of freshly tilled and seeded beds.
Lettuces Under Floating Row Cover Hoop House

Lettuces Under Floating Row Cover Hoop House

The cool season crops I planted into the garden beds back in March were given a boost of heat by way of hoop houses covered in plastic.  But, as the days have warmed and the crops have started to acclimate to the warmer weather and longer days, I decided it was time for some of them to switch out their winter plastic coverings for the  lighter fabric provided by floating row cover.

My lettuce bed would grow just fine without floating row cover and likely wouldn’t be decimated by pests — except for my neighbor’s cat. I do not want to find that he or his buddies are using my beds as his toilet. So, strapping the row cover onto the hoops means that sunlight reaches the plants, rains do too. Air also begins to circulate better across the plants, which will help keep down warm-heat related problems. And, the darned cat can’t get into the bed!

Brassica and Spinach Bed covered with floating row cover

Brassica and Spinach Bed covered with floating row cover

Some of my other beds don’t have hoops, but they’re filled with crops that I know have pest problems in the Seattle area:

I could simply drape the fabric over the plants and let it float in place. This technique works well as long as you don’t have a big wind come through. Plants simply push the fabric up as they grow; it is that lightweight. However, I opted to hammer some stakes into the ground and affix the cover crop to it. This insures a few key things:

  • The fabric won’t blow away
  • The cat can’t poop on my cauliflower
  • Birds can’t eat my radish seed or seedlings
  • I can see through the fabric to watch the plants grow.
Recycled Aluminum posts with plastic clips holding row cover in place

Recycled Aluminum posts with plastic clips holding row cover in place

In one of these non-hooped beds, I used recycled coated aluminum poles from my old, broken down zipper greenhouse. I draped the fabric over them and affixed them with extra hoop house clips.  In another bed, I hammered wooden stakes into the edge of the bed and stapled the material to the posts and to the nearby fence. Both seem to be working quite well.

It is also important to realize that the floating row cover as well as plastic hoop covers will also keep the pollenators out of the plants. So, as you’re planning your cropping rotations, it is important to remember this. Right now, my beds are filled with items that don’t require pollenation. Essentially, I’ve got greens and root veggies going. However, later, as I start adding in squash, cucumber, tomatoes and other flowering/fruiting vegetables, I’ll need to be sure to place them in zones where the covers can be opened to allow bees, butterflies, hummingbirds and other beneficial insects to join the party and help make my garden productive. If that means picking a few green worms off my cabbage later in the season, so be it. But for now, those white butterflies can fly, fly away!

Unfortunately, it doesn’t help with slugs, but that’s a post for another day.

Want to learn more about cabbage loopers, carrot fly, and other edible garden pests? Visit the gardenhelp store and pick up a copy of Steve Solomon’s Growing Vegetables West of the Cascades. It is a fantastic resource for all veggie gardeners!

Need some floating row cover for your garden? Contact Irish Eyes to order yours now!

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