Tomato Blight Spreading

  • The blight hitting tomatoes is actually the same blight responsible for the Irish potato famine in the mid-19 century. (Photo by T. A. Zitter, courtesy of Cornell University)

If you’ve been waiting all season
for that quintessential taste of
summer – a juicy, ripe tomato from
the garden – you might be disappointed.
This year a tomato blight has swept
across the Northeast and is moving
into Midwestern gardens and farms.
Julie Grant reports:

Transcript

If you’ve been waiting all season
for that quintessential taste of
summer – a juicy, ripe tomato from
the garden – you might be disappointed.
This year a tomato blight has swept
across the Northeast and is moving
into Midwestern gardens and farms.
Julie Grant reports:

Walk around this outdoor farm market in Cleveland and just say the words ‘tomato blight’ – nearly anyone in earshot has a story to tell.

Susan Myers says her home garden has given over to what she thinks is late blight.

“But it’s pretty serious. I mean, it’s like wiping out everything. I have lots of tomatoes and all the leaves are dropping. I’ve never, ever had that before.”

It doesn’t look like the farmers here are having trouble with tomato blight. Most tables are piled high with bright reds and yellows.

Skip Conant has a beautiful display of heirloom tomatoes – but he’s not sure how many more weeks he’ll have fruit to offer.

Conant: “We definitely have tomato blight. It’s been a cool, wet spring, so, yeah. There’s a fair amount tomato blight.”

Grant: “What does it look like?”

Conant: “You’ll see a yellowing and curling on the leaves and then the stem will turn brown. The plant will become a very brown. Die from basically the inside out or the bottom up.”

It’s hard to tell yet if these Midwestern growers are starting to see the same blight that decimated the northeast tomatoes.

Bill Fry is a plant pathologist at Cornell University. He’s studied late blight for 35 years. Fry says it looks like irregular shaped black spots, and can appear on the leaves or the fruit. It can destroy an entire crop in just a few days.

This is the same blight responsible for the Irish potato famine in the mid-19 century. Growers have seen late blight since then. But Fry says, not at these epidemic proportions.

“The fact that it’s just everywhere is, I think, is the major difference from previous years.”

This wasn’t the first cool, wet spring on record. So, why has the blight so bad this year?

It’s kind of ironic. Fry and his colleagues have been studying the problem and think it’s probably because so many people are gardening. Millions more than just last year. And lots of those people bought tomato plants at stores like Home Depot, Kmart, Lowe’s and Wal-Mart.

“Infected plants were sold throughout the northeast in the box stores. They were transplanted to home gardens and from there the pathogen disbursed to other home gardens, to conventional and organic farms.”

Fry says you might not even notice at the supermarket. Commercial tomato growers spray lots of fungicide to keep away the blight. But organic tomatoes are getting harder to find.

But chefs and tomato lovers who’ve waited all season for those locally-grown heirloom – and especially organic – tomatoes aren’t finding what they want in markets in the northeast.

Back at the Cleveland market, chef and restaurant owner Karen Small has been waiting for tomato season – and it finally hit. She depends on this market for her produce and stops at just about every stand.

But as Small hears farmer after farmer describe what they think is late blight – she’s worried about the weeks to come.

“We’re accustomed to having tomatoes well into September, and maybe that’s not going to happen this year.”

Small plans to go home and rip out the tomato plants in her home garden – after hearing late blight described so many times, she’s pretty sure her tomatoes are infected.

For The Environment Report, I’m Julie Grant.

Related Links

Gardens Going Mobile

  • Wilson City Farm is part of Chicago's Resource Center, and Tim Wilson is the garden manager. The 1.25 acre plot produces eighty varieties of eleven crops. (Photo by Shawn Allee)

Urban farming is supposed to be a solution to getting fresh, locally-produced food to city folk.
The movement’s taking off because a lot of cities have empty, vacant lots to plant on, but there’s a problem: city governments or developers won’t let growers stay on those lots forever.
Shawn Allee met one urban farmer who’s not worried about losing the farm:

Transcript

Urban farming is supposed to be a solution to getting fresh, locally-produced food to city folk.
The movement’s taking off because a lot of cities have empty, vacant lots to plant on, but there’s a problem: city governments or developers won’t let growers stay on those lots forever.
Shawn Allee met one urban farmer who’s not worried about losing the farm:

Ken Dunn’s City Farm looks less like a traditional farm than a construction site.

There’s fence around an acre or so of soil. There are two small sheds.
And there’s a greenhouse – but it’s not glass or anything – its plastic strung over a bunch of metal tubes.

These are available commercially for about 1,500 dollars and will last for many years. This is the third year this one’s been up.

Dunn makes no apology for the make-shift feel.

“This is a mobile farmstead. Our fence that surrounds this property has been in three locations in the past twenty years as have the tool shed, and office trailer. So, everything here can be picked up and moved within a week or, if necessary, within a couple days.”

In fact, Dunn’s planning on it. He’s on land owned by the City of Chicago, and he has to move next year.

“Our deal with them is that we are occupying it until they sell the property. I think it will be having luxury condominiums. I think they have a price tag of 6 million dollars on this acre. As tax payers we have to take the six million.”

But Dunn’s not worried – he’s lined up another lot to plant on.
Dunn thinks more urban farmers should be just as mobile as he is by keeping their equipment light and scouting for the next available growing space.

Here’s his argument: City governments or developers might let you squat on vacant land for a while, but you can’t count on them selling it to you at an affordable price – or just giving it you.

Seems reasonable enough, but I thought I’d ask urban farming groups how they take this mobile farm idea.

“In my opinion, it should be permanent.”

This is Erika Allen.
She heads the Chicago branch of a group called Growing Power.

“It shouldn’t be something that you have access to some land for a few years and then have to move. In my mind, that’s not agriculture.”

Allen says across the country, urban farms have provided fresh food and even jobs.

She says mobile farming kind of let’s city governments off easy; if urban farms are so useful, cities should help them own farmland.

“I think once we were able to prove you can grow food in the city and it can be productive and beautiful, then it’s an issue of policy. What’s the priority? Why aren’t we relegating some of this space just for urban agriculture?”

Ken Dunn says he’s heard this criticism before. He calls his mobile farming approach a little more realistic.

Dunn says rural farmers can’t grow everything they want, however they want; they have to adjust to the landscape, soil conditions, and weather.

He says he’s just adjusting to an urban reality: real-estate markets value commercial and residential property more than farmland.

“We have to operate this sustainably. That is, working within the forces that are operating instead of hoping to always get 15 years in some hidden corner or somewhere and it might turn into less because someone comes in overnight and bulldozes your project. So, sustainability means keeping operative from year to year with no setbacks. A planned move is no set-back at all.”

With that, Dunn has to leave.
It’s planting season and he and his staff have a lot of work. They want this crop to be special, since it could be their last growing season on this vacant lot.

For The Environment Report, I’m Shawn Allee.

Related Links

Heirloom Seeds Preserved in Gardens

  • The produce we see in stores today are bred for uniformity in color and size. Heirloom seeds grow vegetables that look different, and those who grow them say they taste better too. (Photo by Deon Staffelbach)

Planting a seed has a pretty obvious purpose: once you put it in the ground, if you’re lucky, a few weeks later something pretty or useful pops up. But for some people, seeds are a lot more than that. The Great Lakes Radio Consortium’s Nora Flaherty has this report:

Transcript

Planting a seed has a pretty obvious purpose: once you put it
in the ground, if you’re lucky, a few weeks later something pretty
or useful pops up. But for some people, seeds are a lot more than
that. The Great Lakes Radio Consortium’s Nora Flaherty has this report:


Greenfield Village is a historical village that’s part of the Henry Ford
Museum in Dearborn, Michigan. The village has one of those “living history”
farms where people do things like shearing sheep and chopping wood, while
dressed in 19th century clothing.


They try hard to make the farm authentic,
and part of this has to do with the seeds they plant — they’re the very same
kinds that 19th century farms in this part of the country would have used.
They’re called heirloom seeds. Jim Johnson is the manager of special
programs at Greenfield Village. He says that the vegetables that heirloom
seeds produce aren’t what people are used to seeing.


“They’re lumpy and bumpy and sometimes have a strange look to them, but some of these varieties have a taste that cannot be compared to the things you can find on the supermarket shelves today. Most of the things you can find today in the standard produce section, they’re grown to be uniform, they look appealing to the eye, but typically they don’t have a very good taste and have been around for a while.”


Johnson says that it’s important to use seeds that are authentic. That’s
because what people plant, can show a lot more about them than just what
they eat. Laura Delind is an anthropologist at Michigan State University;
she says that even the names of seeds, can say a lot about a group. She
points to a seed grown by traditional farmers in Africa, that has a much
more telling name than what you’d see on a seed packet at your local
hardware store.


“It grew at a time when a majority of other beans didn’t. And what I found compelling is the seed was called ‘So the Grandparents Can Survive.’ Inherent in the seeds is a whole set of social relationships, responsibilities, cultural understandings, and a collective wisdom about how to manage, live well in a particular place.”


Delind says that in the U.S. we’ve lost a lot of this. But for many people, growing heirlooms isn’t just a thing of the past or something that people do in far-off countries.


Heirloom gardening has become more popular in recent years. In part that’s
because of the taste. It’s also because people have become more concerned
about commercially developed seeds, which are sometimes genetically
modified. Royer Held offers classes about heirloom seeds. He says that
planting, saving and sharing heirloom seeds, are important for a lot of
reasons, especially now when the food we eat comes from fewer and fewer
places.


“People are giving up the cultivation of these varieties they’ve maintained over centuries and millenia. We’re basically at risk of losing a lot of very unique agricultural material. And what we’re trying to do here in Ann Arbor is to encourage the gardening community here to take on as their personal responsibility the maintenance of these varieties.”


Although Royer Held is a long-time gardener, he can’t say that he’d given
that much thought to spreading the word about heirlooms until a couple of
winters ago. When bad weather kept him inside, he passed the time reading.
In one book he found that that the U.S. Department of Agriculture, kept
supplies of lots of heirloom seeds that weren’t widely available.


He requested several kinds of potato seeds from the agency. When they arrived
he and his friend Marcella Troutman planted them along with some other
heirloom seeds. They saved the seeds and cuttings from the new plants, and
now they’re making these available as well as trying to get people used to
the idea of saving their own seeds. She says that people can be a little
intimidated by the idea.


“They almost think it’s not going to be as good as having bought seeds in a packet from a reputable seed company.”


She hopes that in time, people will get over this. Royer Held adds that saving seeds and sharing them with your friends are all part of what makes gardening rewarding.


“If you grow heirlooms, you should save the seeds, because it’s only by saving the seeds that you can allow the plants to grow and develop and adapt to particular growing conditions. And if you do, save enough for your friends because they might want some too. And if they take time, they’ll probably wind up liking them better, which gets us back to why we all garden.”


They hope that in the end, people will get comfortable enough to start creating and sharing their own varieties.


For the GLRC, I’m Nora Flaherty.

Related Links

Biologists Find Deer Devouring Rare Flowers

  • Largeflower bellwort (Uvularia grandiflora) is one of the wildflowers declining at many of the sites studied by University of Wisconsin researchers. (Photo courtesy of Dave Rogers, UW Herbarium)

Most of us think of the white-tailed deer as a graceful and cherished part of the natural scene. But it turns out when there are too many deer, it’s bad for some of the plants in the forest. New research suggests deer may be a prime culprit in a worrisome loss of rare plants in the woods. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:

Transcript

Most of us think of the white-tailed deer as a graceful and cherished
part of the natural scene. But it turns out when there are too many
deer, it’s bad for some of the plants in the forest. New research
suggests deer may be a prime culprit in a worrisome loss of rare
plants in the woods. The Great Lakes Radio Consortium’s Stephanie
Hemphill reports:


Gardeners in many suburbs and rural areas know deer are good at
mowing down hosta, tulips and other favorite plants. In the woods,
deer munch on the small plants that live on the forest floor… plants
such as orchids, lilies, and other wildflowers.


Fifty years ago, researchers at the University of Wisconsin surveyed
hundreds of acres in the state, and made careful records of the plants
on those sites. In those days, the deer population was a lot lower
than it is now. In the last couple of years, two biologists went back to
many of those same sites and counted the plants living there now.


Tom Rooney says at most sites they found fewer different kinds of
plants.


“It tends to be the same species occurring over and again on the site.
You’re losing the rare species and picking up more and more
common species.”


He says they tried to link the decline in rare species to the fact that
the forest is getting older. But they found no evidence for that.
Instead, lead researcher Don Waller says the evidence points to
deer, which have increased dramatically over the last fifty years.


“The worst changes we’ve seen, ironically were in a couple of state
parks and a protected natural area, that showed losses of half or
more of species in 50 years. However, in these sites there was no
deer hunting, implying high densities of deer may be causing a lot of
the effects we see in the woods.”


Plants that rely on insects for pollination declined more than other
types of plants. Waller thinks it might be because the insect-
pollinated plants have showy flowers, which could catch the eye of a
wandering deer. As the flowering plants decline, the insects and
birds that rely on them for food could decline as well – bees, moths,
butterflies, and hummingbirds.


Waller says it’s worrisome because scientists don’t know how
particular insects and plants work together to support each other.


“As we’re losing parts of the ecosystem, we’re really not sure what
their full function is, they might play some crucial role we’re not aware
of and only too late might we become aware of the fact that this loss
led to an unraveling or threats to other species.”


Waller says the only places they studied that still have a healthy
diversity of plants are on Indian reservations. The Menominee Tribal
Forest in northeastern Wisconsin is pretty much like it used to be fifty
years ago.


(forest sounds under)


In this forest, there are only about ten deer per square mile. That’s
about as low as the deer population gets in Wisconsin. It’s not that
the tribe is hunting more deer; it’s the way the forest is grown.


Deer find lots to eat in young aspen woods; there’s less for them to
eat where pines and oaks and maples grow. Don Reiter is the wildlife
manager here. He says in the 360 square miles of the Menominee
forest, there’s really four different types of woods.


“We have pulpwood, we have northern hardwoods, white pine, red
pine, and again, the forest ecosystem as a whole, there’s plenty of
food out there for the deer.”


And because there aren’t too many deer, young pines and hemlocks
– and orchids and lilies – have a chance to grow.


In the upper Great Lakes states, wildlife officials have been trying to
thin the deer herd for several years. That’s because state officials
have been aware deer were causing problems by eating too many
plants. The recent study provides dramatic evidence.


In Minnesota, for instance, hunters are shooting four times the
number of deer they shot fifty years ago.


Steve Merchant is forest wildlife program consultant for the
Minnesota DNR. Merchant says the agency has liberalized its rules,
to encourage hunters to kill even more deer. But the number of
hunters hasn’t gone up in recent years. And lots of private
landowners post no-hunting signs.


“We need to have some help from people, people still need to get out
and hunt deer, and landowners need to provide that access for
people to harvest deer.”


Merchant says Minnesota is gradually trying to restore pine forests,
which were cut down for lumber and replaced with fast-growing
aspen. More pine forests could cut down on the deer population…


“But as long as we still have the strong demand for the aspen
markets that we do, and we manage those aspen forests in a
productive manner for wood fiber, we’re going to create a lot of good
white-tailed deer habitat.”


Merchant says it would take decades to change the woods enough to
reduce the deer population. And in the meantime, we’re losing more
and more of the rare flowers.


For the Great Lakes Radio Consortium, I’m Stephanie Hemphill.

Related Links

Earthworms Alter Forest Ecology

Most of us think of earthworms as beneficial creatures. Gardeners are always happy to spot a worm in the flowerbed because they add fertilizer to the soil. Many anglers say they’re the best thing for catching fish. But scientists are beginning to learn worms aren’t so friendly to Great Lakes forests. The Great Lakes Radio Consortium’s Stephanie Hemphill reports:

Transcript

Most of us think of earthworms as beneficial creatures. Gardeners are always happy to spot a
worm in the flowerbed because they add fertilizer to the soil. And many anglers say they’re the
best thing for catching fish. But scientists are beginning to learn worms aren’t so friendly to
Great Lakes forests. The Great Lakes Radio Consortium’s Stephanie Hemphill reports.


(fade up Girl Scouts)


This Girl Scout troop is learning about worms. Judy Gibbs is a naturalist at the Hartley Nature
Center in Duluth. She shows the girls how to coax worms out of the soil. They pour water laced
with powdered mustard into the worms’ burrows.


It irritates the worms and they come squiggling up by the hundreds.


“Pour it in. Wait a minute. Here it comes. It doesn’t like the mustard and it comes right up.
Look at this one (laughter). oh, there’s another one. Look at it go!” (shrieks)


On their walk through the woods, the girls look for dead leaves. There aren’t many. Judy Gibbs
explains why.


“Here’s a leaf stem that’s being pulled into this hole. Who’s doing this? Ants! No. Worms.
There’s big night crawlers. You know what a night crawler is? They grow straight down into the
ground, and they come up at night and pull leaves down into their burrows. And they eat the leaf
right off. That’s why we’re not finding any leaves.”


Worms eating leaves might seem natural, but it turns out these worms aren’t native to these
woods. The last glacier buried most of what is now the Great Lakes region. When it melted,
plants and animals returned to create a community of maples, pines, songbirds, and tender plants
growing on the forest floor, like trillium…but not earthworms.


Cindy Hale is a biologist who studies the native wildflowers that grow in northern hardwood
forests. She loves the spring bloomers that take root in the spongy layer of decaying leaves on
the forest floor. Trillium, bloodroot, solomon’s seal.


Hale says many of these plants are disappearing.


“Sites that forty years ago were carpets of trillium have been slowly over the last two decades
declining to almost nothing, and people were scratching their heads, trying to figure out just
what’s going on.”


Earthworm populations are thickest close to cities. But Hale says people bring worms with them
when they come to the woods.


At first, settlers carried them in, along with the animals and plants they brought from Europe or
the east coast. These days, worms are spread by people who drive in the woods – loggers, ATV
riders…


“But in particular, fishing bait is a huge way that worms get moved around in our region.
Because there’s so many lakes and so much fishing.”


Hale and her colleagues set up test plots along an advancing line of worms in the Chippewa
National Forest in central Minnesota. The worms crawl about three yards further into the forest
each year. Hale is studying how the soil and the plants have changed as the worms advance.


Worms eat the decaying leaves on the forest floor. They mix that organic matter into the mineral
soil beneath it. And in time, they can use up all the organic matter and leave only mineral soil
behind.


That means the plants that have evolved to take root in the leaves on top of the soil have lost their
home.


Hale says these changes could affect every plant and animal that lives in the woods. She says,
for instance, even birds have declined by nearly 50% in the last fourteen years.


“Because ovenbirds nest in that forest floor, so if you lose the forest floor, then you may well
affect ground-nesting birds such as that. So when you start thinking about it, the potential
ramifications across the ecosystem get really wild.”


Hale says one of the big challenges in studying this problem is that there’s been very little basic
research – like how many worms are there are and where.


To gather more information and to get more people involved, Hale created a web-based learning
program. She’s asking teachers from around the country to have their classes do worm counts
and other research. Hale plans to add their data to the web page.


In Minnesota, the Department of Natural Resources is working with interest groups to try to slow
the spread of worms. Next year’s fishing regulations will include instructions not to dump your
worms at the end of a day of fishing.


For the Great Lakes Radio Consortium, I’m Stephanie Hemphill in Duluth.