Sticky Seeds From Weeds

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There?s a hitchhiker lurking in your car right now and you don?t even know it. Fortunately, it?s not the kind that might end up on the nightly news, but it?s almost as bad where the ecosystem is concerned. Learn more about hitchhiking weeds in this article. IN THE GARDEN; Don’t Let Those Sticky Seeds Get Around As a subscriber, you have 10 gift articles to give each month. Anyone can read what you share. Give this article By Joan Lee Faust How to Get Rid of Sticky Willy. Sticky willy (Galium aparine) goes by many different, descriptive common names including bedstraw, catchweed, beggar’s lice, scratchweed and velcro plant. This annual plant is often an unwanted weed where it invades roadsides, home landscapes and vegetable or flower gardens, often …

Seeds That Stick To Clothing: Different Types Of Hitchhiker Plants

Even now, they’re lingering along the roadside waiting for you to pick them up and take them wherever you’re going. Some will ride inside your car, others on the chassis, and a few lucky ones will find their way into your clothing. Yes, weeds that spread by people, or hitchhiking, have certainly taken advantage of you this year. In fact, the average car carries two to four seeds for hitchhiker plants at any given time!

What are Hitchhiker Weeds?

Weed seeds spread in a variety of ways, whether traveling by water, air, or on animals. The group of weeds nicknamed the “hitchhikers” are seeds that stick to clothing and fur, making it difficult to dislodge them immediately. Their variously barbed adaptations ensure that the seeds will travel far and wide via animal locomotion, and most can be eventually shaken off down the road somewhere.

Although it might sound like all fun and games, the weeds spread by people are not only difficult to contain, but they’re also costly for everyone. Farmers lose an estimated $7.4 billion each year in productivity to eradicate these pest plants. Humans are spreading these seeds at a rate of 500 million to one billion seeds a year in cars alone!

Although the weeds within crop stands are annoying, those that appear in fields can be downright dangerous for grazing animals like horses and cattle.

Types of Hitchhiker Plants

There are at least 600 weed species that travel by hitchhiking with humans or on machines, 248 of which are considered noxious or invasive plants in North America. They come from every kind of plant, from herbaceous annuals to woody shrubs, and occupy every corner of the world. A few plants you might be familiar with include the following:

  • “Stick-tight” Harpagonella (Harpagonella palmeri)
  • “Beggerticks” (Bidens) (Krameria grayi) (Tribulus terrestris) (Opuntia bigelovii) (Torilis arvensis) (Symphyotrichum lateriflorum) (Arctium minus) (Cynoglossum officinale) (Cenchrus)

You can help slow the spread of these hitchhikers by carefully inspecting your clothing and pets before emerging from a wild area full of seeding plants, making sure to leave those unwanted weeds behind. Also, reseeding disturbed areas like your garden plot with a cover crop can ensure that there’s too much competition for hitchhikers to thrive.

Once those weeds emerge, digging them out is the only cure. Make sure to get 3 to 4 inches (8-10 cm.) of root when the plant is young, or else it’ll grow back from root fragments. If your problem plant is already flowering or going to seed, you can clip it at the ground and carefully bag it for disposal – composting will not destroy many of these types of weeds.

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Last, but not least, check your car any time you’ve been driving on unpaved roads or through muddy areas. Even if you don’t see any weed seeds, it wouldn’t hurt to clean your wheel wells, undercarriage, and any other location where seeds might be hitching a ride.

IN THE GARDEN; Don’t Let Those Sticky Seeds Get Around

As a subscriber, you have 10 gift articles to give each month. Anyone can read what you share.

Give this article

By Joan Lee Faust

  • Nov. 21, 1999

THERE is more to fall cleanup than raking or blowing leaves away. Although such effort should have top priority to allow the green grass underneath to breathe.

While tending to the chore of cutting down browned stalks, all that are left of bygone bloom, be wary of the problem of garden debris. It ends up on sweat shirts, pants and shoes and once the yard cleanup is over, it often takes just as long to shake off the duff from the outfit. What is that stuff?

They are called stick-tight seeds. It is nature’s way of getting around. Or to put it another way, you have participated in the common methods of seed dispersal. Those who have pets that are allowed to run free near a field or along a rural street know this problem.

Sometimes the results are just as obvious with pets who spend time running around the garden. Most common of the stick-to-fur weed seeds are those burdocks with the hooked spines. Fortunately, most gardeners are able to recognize this weed and pull it up to to keep it out of their gardens. But when pets run in fields or along roadways, they do get into trouble.

Sometimes the burdocks have to be cut from the fur, they stick so tightly. Other troublemakers are members of the bidens clan. Their name actually means ”two teeth.” These two-pronged seeds from plants commonly called stick tights or beggars’ ticks are equal nuisance makers. They not only stick to fur and feathers but also seem to adhere easily to shoe laces as well. What is happening?

The seeds are traveling and sticking to anything they can grab on to, either fabric or fur. Or another common seed carrier are the feathers of birds. Some seeds such as those of the Eupatorium clan are hard to avoid. The old, browned stalks of these tall, elegant plants replace the beautiful statures of the joe-pye weeds or the stately bonesets. These native plants are often used at the backs of borders for their tall finesse that they add to any scene.

But now, they are almost ugly in their fallen state and down they must come. Getting under these stalks to prune them to near ground level means climbing under large floppy stalks. This is when the seeds cling to fabric and even get in your hair.

All of the bedstraws have sticky habits, too. Although the plants are low to the ground, the seeds do have a way of traveling far and wide by hooking a free ride. Some of the feathery goldenrods have a way of messing up things, too, but they are forgiven for their long, late display of color. So are the mums forgiven, although their seeds are better behaved.

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Although impatiens seeds do not stick to fabric, they provide a practical lesson in seed dispersal. No wonder they have earned the nickname ”touch me not.” Where early frosts have not destroyed these plants, look underneath the protected leaves to see the spirally fruit. Touch it and the seeds explode. When volunteers of tiny seedlings appear in pots and borders next summer, you can recall where these seeds come from.

Another fascinating way of seed dispersal, too often overlooked, are the unusual pointed seed pods of the geranium clan. These plants are not named cranesbills without reason. The tiny seeds form at the tips of the cranelike formation and sling off, which is one reason to explain why a geranium sprouts over here, when it was planted over there.

In the spring, the feathery stage of the dandelion flower is nothing more than another form of seed dispersal. What is thought of as a lovely soft puff to blow is just the dandelion’s way of getting around. At the base of these light parachutes is a seed. And where it lands, of course, is where the seed grows.

This helps to explain why there are so many dandelions in the lawn come summer. Another dramatic dispersal of seed is demonstrated by the explosive nature of the witch hazel seed. The fat pods of seed form soon after the flowers appear either in late fall or early spring, depending on the particular species. When ripe, the fat seed capsule opens to explode its black seed out on the ground.

Seed travels for some distance, too. One of the most dramatic forms of seed dispersal is by water. One of the largest seeds to be dispersed this way is a coconut, which falls from palm trees. It is easily carried off by ocean waters to distant lands, where it lands on beaches and may eventually sprout into palm trees. This may help explain why the tropical islands are so often forested right down to the water’s edge.

Seed dispersal is not always a good thing, referring again to those who work outdoors. Be careful where the unwanted seeds are discarded when found on clothing. Throw them in the trash, never on the compost pile.

How to Get Rid of Sticky Willy

Perhaps best known as Sticky Willy, Galium aparine – USDA growing zones 3 to 7 – is an annual plant, largely considered to be a weed. With some basic steps, however, the savvy gardener can effectively remove it from his or her yard. Also known as Goosegrass, Coachweed, Catchweed and Cleavers, it can cause some serious problems for both gardeners and farmers.

Why Get Rid of Sticky Willy?

The sap of the plant can cause severe skin irritation in people who are sensitive to it. If left unchecked, the plant can also severely hinder other plants’ ability to grow. If left unchecked in agricultural operations, the plants can reduce crop yield in some species by between 30 and 60 percent.

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The seeds and foliage of Sticky Willy can contaminate the wool and fur of some livestock raised for the production of clothing. If animals consume it, it can inflame their digestive tracts. Its seeds can get stuck in the fur of animals and is very difficult to remove. It can also carry with it different diseases and pests.

Identifying Sticky Willy by Its Small Spines

Sticky Willy is quite easy to identify, thanks to the downward-pointing brown prickles on its leaves – which appear in groups of between six and eight – and stems. Its oblong-shaped eggs have slightly notched tips. Its seed leaves, or cotyledons, are smooth, however. If allowed to mature, Sticky Willy can grow to be 40 inches tall. Large groups of the plants often spread in dense mats over the ground, made all the more dense by their spines. Their flowers are four-parted and often white or greenish-white.

The weed can be found around the world. Most often, Sticky Willy grows in moist and shady areas such as areas filled with waste, on roadsides and in gardens. The species can also affect the growing of hay, rapeseed, sugar beets and various cereals.

Removing Sticky Willy Is Harder Than You Think

Getting rid of a Sticky Willy plant is easy enough; in fact, it’s just a matter of pulling it from the ground. However, each plant can have between 300 and 400 seeds, which spread readily and can lie dormant in soil for six years.

The best way to remove the plants for good is to get them out of the soil before the plants flower and develop their seeds — ideally in the early spring. This can be done using a hoe or another tool that gets to the roots, or by hand. As the plant’s sap is irritating, wearing gloves is an important step if you choose the latter option. If the plant has already flowered, attempting to remove it will only spread the seeds.

Applying a heavy layer of organic mulch or using plastic mulch can also prevent the seeds from reaching the soil or getting enough light to grow.

Gardeners looking to avoid Sticky Willy near their homes should be sure to brush down their clothing and pets after walking in areas where the weed is commonly found, or after exposure. Like most parts of the plant, the seeds are covered in tiny barbs that can stick to cloth or fur easily. The seeds spread easily, and even a few of the hardy seeds can cause an outbreak in a garden.

Chemical Solutions for Galium Aparine

Some herbicides have proven to be effective in removing the pesky plant. Contact herbicides containing acetic, fatty or pelargonic acids can scorch off Sticky Willy’s foliage, including its seed leaves. However, these can damage nearby plants, so covering desirable garden plants is recommended, at least until the chemicals dry on the weed foliage.

Glyphosate can be used in the same way, but it’s more important to ensure none of it gets on any other plants.

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