Things are always changing in the orchard. Some changes are good, like new varieties and plantings. But some changes can be difficult to deal with. Over the last few years two new invasive species have appeared in the USA and moved from south to north. The are in Michigan now, and they have an appetite for fruit! And that’s a change we growers are going to have to deal with.
The first is the Spotted Winged Drosophila (SWD). That in itself is a mouthful. SWD is a fruit fly, not unlike the common fruit flies that everyone has seen hanging out in your house or at the produce department. You know that fruit flies like over-ripe fruit and fruit with a cut or a bad spot in it. That’s OK. We didn’t really plan on eating that bad fruit anyway, right? But that is where the SWD differs from your run of the mill fruit fly. You see, the Spotted Winged Drosophila likes nice sound fruit that is still hanging on the tree, vine or bush. And that presents a problem. Because we don’t like bugs in our fruit, and neither do you! These little pests can go from egg to adult in as little as 8 days! So they have the potential to really disrupt the small fruit crops like raspberries, blueberries and cherries. We will have to find ways to control them at a very critical time–from just before the fruit is ripe to when you pick it! We are working on a fix for this invader. In the meantime, we have traps in our orchards to detect them when they arrive, and Michigan State University is providing us with research and information.
The second unwelcome guest in our orchards is the Brown Marmorated Stink Bug (BMSB). These bugs have been moving into Michigan over the last 5 years or so. They originated in Asia and apparently hitch-hiked here some years ago. The BMSB likes to chew on apples and peaches later in the summer and throughout the fall. Which once again presents a problem for growers and consumers of our fine Michigan fruits! Usually by August the pests that like apples have run their course for the year. But that is just when the BMSB is getting ramped up and hungry! And they can really do some damage when they are hungry! So like SWD, we are trapping for the Stink Bugs (aptly named I think). And when they show up we will be waiting for them. And hopefully we will be ready.
So what do we do with these alien invaders? Building a wall won’t help because they can fly. And we can’t check them at the border either. They are already here, so we will have to have to deal with them. But, by working with scientists and biologists, we will find a way to solve the problem and continue to get those delectable apples and sweet cherries to you. Without surprises.
Have a fruitful week!