Last year the timing of the weather here destroyed our elderberry crop. I should have paid attention then, and watered it when it was dry. The dry spell hit just when the berries were forming, and the stems leading to the umbels dried up, leaving small bundles of tiny brown dried up balls.
Elderberries have always been a carefree crop here. Aside from the fact that the stinkbugs have found the umbels to be a hospitable resting place and probably ruin a few berries along the way, nothing has bothered them. Until this year.
This year it seemed that the bushes were just knocking themselves out to make up for last year. They were covered with layers of frothy umbels.
At a certain point the branches of tiny green berries became so heavy that we did some fancy weaving inside the branches to hold them up off the ground.
Shortly after that, I started to notice that when I touched the berries, swarms of tiny bugs emerged and berries, ripe and unripe, fell to the ground.
|The ground under the bushes looks like this. Everywhere under the bushes.|
About that time, my friend Barb Will wrote to ask if I knew what would be causing tiny white worms in their berries. I'd never heard of that. Since then, I've heard from people in various parts of the country who seem to be having the same problem - as am I.
The umbels have not ripened uniformly. Some berries around the outer edges ripen, but burst when picked - if they don't drop as soon as you touch them. The area around the bushes smells strongly of fermenting fruit. Early on I got enough to freeze a couple of quarts and make a gallon of mead. Then I gave up and ordered some dried berries.
|Note all the colors - green, pink, brown. All from the same umbel. The ripe ones mostly fell off.|
So today I posted a picture of some berries on The Essential Herbal's facebook page. We commiserated, and then Denise C brought up the spotted wing drosophila.
A quick search brought up a page from Cornell University.
"The spotted wing drosophila is a vinegar or fruit fly of East Asian origin. It has been in Hawaii since the 1980s, but was first discovered in California in 2008, and Florida, Utah, the Carolinas, and Michigan in 2010. It has many hosts, but is most often attracted to grapes, cherries, peaches, blueberries, raspberries, strawberries, and other soft-flesh fruits."
Now we really have a problem!
I opened several berries while outside earlier, but didn't find any worms. I have seen them, though. The page talks about natural management. Vinegar traps. I think that cutting and burning affected umbels *might* help. Keeping a close eye on the plants has become a necessity.
No longer an easy, carefree crop, but such an important useful plant. Next year we'll have to try some experiments.