I GET A LOT OF QUESTIONS about insect pests, but not just familiar opponents like cucumber beetles or squash bugs and Japanese beetles. In recent years, I get more and more questions from a widening region about a very beautiful but very naughty pest called the lily leaf beetle.
Its story – how it got here, and what it’s doing and what is being done about it — is also the story of the unwelcome arrival of other invasive exotic organisms that have come to our shores unexpectedly, and found no natural predators or other mechanisms to keep them in check.
I got a 101 on the beetle from Lisa Tewksbury, manager of the University of Rhode Island’s Biological Control Lab in Kingston, where she coordinates research on the lily leaf beetle among other invasives. Learn what’s being done by scientists seeking solutions other than chemical herbicides or pesticides, and what you can do in your own yard if you have them, too.
Read along as you listen to the August 21, 2107 edition of my public-radio show and podcast using the player below. You can subscribe to all future editions on iTunes or Stitcher (and browse my archive of podcasts here).
lily-leaf beetle q&a with lisa tewksbury
Q. Before we get started on the lily leaf beetle specifically, can you tell us a little about the lab?
A. The lab was built in 1994 as a biological control quarantine facility, to enable us to do some research with insects from Europe. I work with Dick Casagrande, an entomology professor at the university, and he had been doing some work with potato beetles, and looking at insects that might help control that.
They had wanted to bring back some potential biological control agents, something that could help control the potato beetle, from Mexico. They had done a
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Living and working in northwestern Oregon, garden designer Wesley Younie is no stranger to dealing with challenging environments. When presented with this garden’s elevation changes, drainage management, and extreme climate conditions, he devised a plan that addresses it all—along with a specific functional wish list from the homeowners. Want to know which plants he used? Here are the plant IDs for this beautiful, sustainable landscape.
Experience the charm of Cactus with Arms, where nature takes on an unexpected twist. These captivating plants bring you the rugged beauty of cacti with arms, showcasing nature’s creativity at its finest.
Toad lilies (Tricyrtis hirta) bloom from September to October and have small, lily-like white to pale lilac flowers with heavy purple to maroon spots. They prefer evenly moist, well-drained, organically rich soils and grow best in part shade to shade. Toad lilies reach heights of 2 to 2½ feet tall by 1½ to 2 feet wide and have few disease and insect issues. However, do watch for slug damage, as this may be a problem. These natives from Japan are great additions to South Carolina woodland or naturalized gardens.
One of my favorite childhood memories was watching the first spider lily (Lycoris radiata) bloom spikes magically appear in late August or early September in my parents’ garden. It was a sure sign that fall was on the way. Bulbs collected from my parents’ garden and ruins of my great-grandmother’s garden have been planted in my landscape. My grandchildren now get to experience the same joy in spotting the first blooms.
Are you looking for a low-growing evergreen plant to use around trees and in the shade? Are you frustrated with voles, deer, and rabbits eating your hostas? Then look no further! Nippon Lily (Rhodea japonica) will grow in partial to heavy shade and reaches a height and width of 2 feet. It’s a broadleaf perennial with leathery, glossy dark green, strap-like leaves.
My original piece of Farfugium japonicum ‘Giganteum’ (then known as Ligularia tussilaginea ‘Gigantea’) came many years ago, from a friend at a New York City public garden. Summers, it was lusty and bold, growing mightily in a pot and showing off like crazy. But I could never make the plant completely happy in the offseason, or so I thought, and after torturing it in my house one winter and in my basement (trying to force dormancy) the next, I gave the exhausted creature to a friend with a greenhouse.I kept his likeness here with me, and I guess I pined for him: A mid-century tray I’d bought at at antiques store bore an image of Farfugium, though not to scale. The plant bears ultra-shiny leaves that get to about 15 inches across.When I saw its shining face not long ago in the Plant Delights catalog, which credited the same person I’d got
A NY FLOWER WOULD BE HARD-PRESSED TO COMPETE with the two most colorful ferns in the garden here, which have been showing off since the first crozier poked through the soil surface in early May and won’t stop till very late fall. No wonder I grow so many Japanese painted ferns and autumn ferns; they make shade gardening look easy, adding heavy doses of purple and silver or coral and gold, respectively, and never asking for so much as a deadheading in return.Japanese painted fern (Athyrium niponicum ‘Pictum’, Zones 5-8) is well-known to most gardeners the last decade, a showy thing with varying proportions and intensities of silvery-gray and purple coloration on its parts.
Adam and I talked about not just the Japanese types, but also other garden-sized maples for adding interest in every season and garden situation–in pots or the high shade of woodland gardens, to full-sun locations.my maple q&a with adam wheelerQ. When I was at Broken Arrow recently, there were many choice things to look at—but I kept noticing the maples you offer, particularly. How many do you grow?A. In the collection at the nursery, I suspect we have 150 or 200 different maples, and really that’s the tip of the iceberg with this genus.Q. There are a lot of native A
Much in the same way I deal with everything from tomato hornworms to adult Japanese beetles to Viburnum leaf beetle and tent caterpillars and even the occasional slug in a wet year, my approach to lily beetles is manual–as in pick and squish, or drown.You have to get the adults, and also the eggs, which start out tan and then go from orange to red when they are close to hatching. They can be found wherever there are copulating adults (which is anywhere that adult beetles are, it seems from their flagrant behavior), on the undersides of leaves in uneven lines like a bit of a tiny zig-zag. Squish!Since the beetles overwinter in the soil, the minute lily or fritillaria foliage emerges, there are hungry beetles to damage it, too–meaning if they’re in your area, you probably are already seeing holes. Even if you didn’t get started right away, beg
Y ES, THEY CAN MAKE YOU FEEL VIOLENT, author Teri Dunn Chace admits about weeds in “How to Eradicate Invasive Plants.” In fact, if authors named their own books, this new one might have been called, “The War of the Weeds.” But in that “two wrongs don’t make a right” way of thinking, Teri reminds us that getting out the big guns isn’t where to begin. Understanding who you’re up against, and being strategic, is.