DryStoneGarden

In one of the gardens where I’m working this summer, all of the citrus have had the peels eaten away by some kind of animal. I’ve never seen this before; it looks really strange. The garden is near Berkeley’s so-called ‘Gourmet Ghetto’ in a relatively urban neighborhood that probably has some rats lurking about. Do rats do this? Do they like lemon zest? It doesn’t look like something squirrels or birds would do, and I can’t think of anything else that would do this.

— Update 8/30 — I asked at one of the nurseries and someone there said, yep, it was rats. Kind of gross.

This weekend I pulled out our summer veggies and started most of our winter plants. It was a little late to be taking things out; our basil was starting to brown from the cold, the green beans were being eaten by a pest, and the zucchini was still healthy but had slowed its production. (I had planned to wait until we finished our garden shed, but that project has gotten more ambitious and is taking longer than I expected. The shed will be very cool when it’s finished, but for now it’s just at that tantalizing phase where we can see what it will be like but can’t yet use it.) After five winters at this garden, everything this winter will be plants we’ve grown before — favas, snap peas, beat greens, chard, kale, broccoli, parsley, radishes. There’s less of it this year, as our veggie garden has been slowly turning into a fruit garden, with blueberries, huckleberries, currants, and strawberries now filling up the edges

The other change from past winters is the stone edging on three of the four beds. In August, I pulled out the old scrap wood edging I built five years ago and I replaced it with scrap stone from several recent projects. Some of the stone is a little small and raggedy on the backsides of the beds, but overall I had good stuff to work with and it was fun working with four different kinds of stone in one little area. I came up one stone short with the cabernet wall and I bought the two corner stones to use with the beige sandstone, but it was a near-perfect quantity with about eight of the little bluestone squares leftover and nothing else. The saw-finished sandstone is more contemporary than I would have chosen for our garden, but I really like it.

Without the zucchini it looks a little bare and and in need of more tidying, but the stone just makes it so much better.

golden mummies & aphids

Please excuse the rather unpleasant photo. Aphids are gross, but golden mummies are one of the best things I ever learned about IPM.

We’ve had a couple of outbreaks of aphids this spring, first with the lupine when it put out a big flush of new growth and now on our kales as they begin to bolt. Golden mummies are the brownish, mummified carcasses of parasitized aphids; wasps lay their eggs in the aphids and the larva eat the aphids from the inside, leaving the dried husks. If you aren’t familiar with them, click on the photo and you should be able to see the difference. In the garden, another way to tell the difference is that aphids move and mummies don’t.

When you see an outbreak of aphids, the presence of golden mummies is one sign that natural predators are present. Count the aphids and golden mummies on a leaf, and, if the outbreak includes at least 10 percent golden mummies, the natural predators will deal with the outbreak for you. Spraying would kill the natural predators along with the aphids and therefore be counterproductive, though aiming a spray of water against the aphids to knock them off (which actually kills a large percentage of them, while not harming the beneficials) is okay if you want to speed the process. 

In the photo, I count 14 golden mummies (mostly on the right, but three in the population of aphids on the left) and estimate about 100 aphids, so our IPM is working. Our earlier outbreak on the lupine was the same way, and it resolved itself without intervention.

ryan 4/22