seeds | Field 2 Field

July 31, 2020July 31, 2020

Seed Packages still coming into Minnesota

Seed packages that Minnesotans didn’t order are still coming into the state in steady numbers from China. Many of the seeds are non-invasive species. However, that doesn’t mean they can’t carry some kind of a pest or disease with them.

This is what a typical package of the mystery seeds with a Chinese postmark look like. (Photo from the MDA)

Reports are still coming into the Minnesota Department of Agriculture (MDA) that say citizens continue getting unsolicited seed packages in the mail. To date, over 700 Minnesotans found the seeds in their mailboxes and reported it to the MDA.

The packages contain a variety of seeds. Seed analysts at the MDA Laboratory say some of the seeds are cosmos, radish, mung bean, juniper, basil, cucurbit, and zinnia. Seeds like these are not invasive plants. However, they can carry disease and pests can hide in packaging. The unsolicited seeds likely haven’t gone through proper inspection channels to enter the country legally. The labels typically say something like jewelry is inside.

The MDA is working with the United States Department of Agriculture (USDA) on the issue. Minnesota is sending all the collected seeds to the USDA for additional identification and destruction. Federal officials are investigating the source of the seeds, and the USDA is currently referring to the situation as a “brushing scam.” In that type of scam, people get unsolicited items from a seller who then posts false customer reviews to boost sales. Their latest statement on the seed packages can be found here.

Those receiving the packages have indicated they either never made an online seed order or they purchased seeds online earlier in the year but never got them. Their order information indicates it is still unfulfilled.

Minnesotans should take the following steps to deal with unsolicited packages of seeds.

Save the seeds and the package they came in, including the mailing label.
Do not open the seed packets.
Do not plant any of the seeds.
In case the package is already open, place all materials (seeds and packaging) into a tightly-sealed plastic bag.
Contact the MDA through this form (mda.state.mn.us/unlabeledseeds).

If you have planted the seeds you received, please destroy any plants that have germinated. Plants and soil aren’t eligible for most trash collection. However, in this unusual situation, pull up the plants, double bag them and the surrounding soil, and dispose of everything in the trash. Do not compost the seeds, plants, or soil. Please notify the MDA if you have disposed of any seeds or plants through our contact form.

You should always buy seeds from a reputable source. Minnesota law says all seeds sold in the state need correct labels. People selling seeds need to have a permit from the MDA. You can look up seed permit holders on the MDA website. Never plant unlabeled or unknown seeds.

July 21, 2020July 21, 2020

Invasive weeds found in Winona County

Invasive weeds make yet another first appearance in southeast Minnesota. The Minnesota Department of Agriculture (MDA) has positively identified the invasive weed Palmer amaranth in Winona County.

The MDA was contacted by crop consultants after they discovered several suspect plants in a soybean field. MDA staff scouted the area and removed 20 Palmer amaranth plants, which were then confirmed as Palmer by genetic testing. The field has since been treated with a herbicide application, and follow-up scouting by the MDA did not find any new invasive weeds. The site will be monitored for three years for any new Palmer amaranth.

The MDA is trying to determine the source of the invasive weed.

Now is the time when Palmer amaranth becomes visible in agricultural fields. The MDA is asking farmers, crop consultants, and agronomists to report any suspicious plants to the Minnesota Department of Agriculture’s Arrest the Pest line at 1-888-545-6684 or arrest.the.pest@state.mn.us.

If you’re one of the fortunate ones who haven’t seen Palmer Amaranth show up in your fields, here’s a quick refresher on identifying the plant, courtesy of Purdue University.

Since it was first discovered in the state in 2016, Palmer amaranth has been found in nine Minnesota counties, including Winona County. Details of previous finds can be found on the MDA website.

Palmer amaranth is listed as a noxious weed in Minnesota. All above and below ground parts of the plant must be destroyed, and it cannot be moved. The weed is also listed as a prohibited weed seed in the state. This means no Palmer amaranth is allowed in any seed offered for sale in Minnesota.

Left uncontrolled, a single female Palmer amaranth plant typically produces 100,000-500,000 seeds. It is resistant to multiple herbicides, can cause substantial yield losses, and greatly increase weed management costs in soybeans and corn.

May 28, 2020May 28, 2020

Weed of the Month: Tree of Heaven?

Tree of heaven (Ailanthus altissima) is a deciduous tree native to China, Taiwan, and Vietnam. It was brought to the U.S. in the late 1700s as an ornamental shade tree. Today this tree is found in most of the Continental U.S., Hawaii, and Canada. It looks similar to staghorn sumac, ash, and walnut and has a strong, offensive odor that some describe as being similar to rotting peanuts. In 2020, the Minnesota Department of Agriculture changed the regulated noxious weed designation of tree of heaven from Restricted to Prohibited Eradicate, meaning that all tree of heaven plants must be eliminated.

Tree of heaven is fast growing, can reach 90 feet in height, and live 30 to 70 years. This species is highly adaptable and tolerant of disturbance. It is dioecious, meaning there are separate male and female plants. Female plants produce prolific amounts of seed, up to 325,000 seeds per year. Tree of heaven spreads aggressively in response to above-ground cutting or root breaking. Root fragments found in infested soil may start new populations.

*Tree of heaven with mature seeds. Courtesy: Barbara Tokarska-Guzik, University of Silesia, Bugwood.org*

Tree of heaven is the preferred host for the invasive spotted lanternfly (Lycorma delicatula). Spotted lanternfly can attack over 65 tree species, including trees grown in Minnesota. Spotted lanternfly was detected in Pennsylvania in 2014 and has spread to surrounding states over the last several years, but it has not been found in Minnesota.

weed — *An adult spotted lanternfly. Courtesy: Lawrence Barringer, Pennsylvania Department of Agriculture, Bugwood.org*

Tree of heaven may play a particularly important role in the spotted lanternfly lifecycle. To date, only two tree of heaven plants have been found in Minnesota, and both populations were eradicated. It is unknown if the absence of tree of heaven will affect the ability of spotted lanternfly to establish in this state. If you suspect that you have found a tree of heaven or spotted lanternfly:

Note the exact location with address or GPS coordinates.
If it is possible, take digital photos of the tree – whole plant, rosettes, flowers, and seed stalks – and suspected spotted lanternfly that can be emailed for identification.
Infestations can be reported to one of two places:
1. The Minnesota Department of Agriculture (MDA) by email at arrest.the.pest@state.mn.us or voicemail 1-888-545-6684
2. Directly to EDDMapS through the Great Lakes Early Detection Network app on a smartphone or tablet.

To learn more about the MDA’s Noxious and Invasive Weed Program and the Noxious Weed Law and Lists, please visit: www.mda.state.mn.us/weedcontrol

August 8, 2019August 8, 2019

Japanese Hops Invading Southeast Minnesota

Japanese hops is and invasive weed that’s overtaking the banks of the Root River in southeastern Minnesota and growing onto adjacent property. Weed experts at the Minnesota Department of Agriculture (MDA) are asking for the public’s help in controlling the weed and reporting new finds.

Infestations are popping up along the Root River from Preston to the confluence of the Mississippi River. Small infestations of Japanese hops have also popped up in Winona; however, these have been controlled.

Japanese hops are annual vines native to eastern Asia that can grow up to 35 feet in a single growing season. With this explosive growth, the vines smother native vegetation and even grow into trees. Leaves are approximately 2-6 inches long and have at least 5 lobes that are shaped like a hand with the fingers extended. There are separate male and female plants that are beginning to flower this time of year. Seed production then follows.

Minnesota is also home to American hops. It is a native perennial vine that looks similar but often has 1-5 lobes and does not have more than 5 lobes on the leaves.

“We don’t know how they got to the Root River; but now that it’s here, we need to work together with the public to control this invasive weed,” said Christina Basch, Noxious Weed Specialist at the MDA. “Since Japanese hops is a prohibited noxious weed on the state’s eradicate list, it’s important that we find infestations and work to get rid of it.”

For successful Japanese hops control, the dispersal of mature seed must be stopped. This can be done by pulling or cutting the vines at the base or with herbicide treatment. Herbicide treatment is the only practical approach for large infestations that can’t be mowed. Experimental torching of seedlings appears to be effective for control of small infestations.

If you find Japanese hops on your land and the infestation is beyond what you can manage, report it to the MDA’s Arrest the Pest line at arrest.the.pest@state.mn.us or 1-888-545-6684. It is helpful to include photos with the report. It is also important to report infestations other than those on the Root River.

Work is already underway to control Japanese hops in the Root River area. Through a grant from the MDA, the Fillmore Soil Water Conservation District and Houston County Planning and Zoning are conducting hops treatments on the Root River banks. Fillmore and Houston County officials, with grants from the Board of Water and Soil Resources Clean Water Fund, are also using Conservation Corps Minnesota (CCM) to control hops along the Root River Trail. The MDA is working with landowners and CCM to control hops on private lands. The MDA’s work to control Japanese hops and oversee the coordinated efforts is supported by the Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizens Commission on Minnesota Resources.

June 6, 2019June 6, 2019

MDA Issues Advisory on Cover Crop Seed

Minnesota Seed Law must be followed on prevented planting acres

Minnesota farmers may be in the market for more cover crop seed than in previous years. Poor planting conditions this spring are forcing some farmers to make decisions on prevented planting. The Minnesota Department of Agriculture (MDA) wants to remind farmers about the legal requirements for selling and buying seed in Minnesota, which does include cover crop seed.

MDA says it has seen several issues in past years that violate Minnesota’s Seed Law. Buying grain from an elevator for the purpose of sowing is not legal. It is also illegal to brown bag or sell grain out of a bin. Furthermore, all seed sold in the state must be labeled.

“Minnesota’s Seed Law restricts these activities for numerous reasons, ” said Denise Thiede, MDA’s Seed Unit Supervisor. “Farmers could be bringing in weeds through unlabeled and untested seed, or they may not be get the type or quality of seed they paid for.”

In addition, almost all seed varieties have some form of intellectual property protection that restricts the use and sale of the variety under the federal Plant Variety Protection Act. Violating this act can lead to significant fines for both the seller and the buyer.

If farmers are buying seed to sow on their land, the MDA offers the following advice:

Make sure the seed has a label.
Confirm the cover crop seed has been tested for noxious weed seeds, including Palmer amaranth.
Make sure that it is a legal sale by asking the seller if they have the legal authority to sell the product.
Ask about the variety of seed. A variety protected by the Plant Variety Protection Act must be sold by variety name and may be required to be sold as a class of certified seed.

More information on the requirements for selling seed in Minnesota can be found at on the MDA’s website (www.mda.state.mn.us/seed).

April 11, 2019April 11, 2019

Japanese Hops are MDA Weed of the Month

When you hear the word “hops,” you might think of beer. Hops are used in beer production to add bitter, floral, fruity, or citric flavors and essential oils for preservation. However, Japanese hops lack an essential resin for beer production. Common hops are a similar native species and can be used for beer production. Introduced to North America as ornamental vines, they are native to eastern Asia. Unfortunately, Japanese hops escaped cultivation and have become invasive.

Japanese hops have distinct bracts where the leaf and petiole attach to the stem. The leaves have toothed edges with 5 to 9 lobes arranged palmately (shaped like a hand with fingers extended), while common hops only have up to 5 lobes.

The weed has both male and female vines. With female vines, seeds are produced in conical husks; male vines produce pollen from flowers. Hooked hairs on the stem and leaves help the vines climb but can irritate human skin after contact.

Seeds from the vine are easily dispersed by wind, water, wildlife, vehicles, and equipment. This allows the invasive weed to grow very rapidly. In just one season, they can grow up to 35 feet long. The vines twine around to climb vegetation and structures, capable of smothering desirable vegetation and producing dense mats several feet thick.

Japanese hops have distinct bracts where the leaf and petiole attach to the stem. (Contributed Photo)

Japanese hops are annual vines in Minnesota but can be perennial in warmer climates. They thrive in partial to full sun including next to rivers, along roadsides, grasslands, and forest edges.

They’ve been found in southeastern Minnesota along the Root and Mississippi rivers, as well as in the city of Winona. Most infestations are on riverbanks and creep into adjacent forest understory.

If you suspect you have found Japanese hops, please take pictures of the plant, note the exact location, and send a report to arrest.the.pest@state.mn.us. If you have questions or would like more information, please visit the Minnesota Department of Agriculture or the Midwest Invasive Plant Network websites.

June 7, 2018

Poison Hemlock Spreading Across Minnesota

Poison hemlock is a toxic member of the carrot family. That’s right, I said carrot family. It can grow to heights of eight feet and has clusters of small white flowers that bloom from May to August. The leaves are fernlike and the stems have purple spots. All parts of the plant are toxic if ingested, which can be especially dangerous to livestock that accidentally eat it while grazing.

2017 was an important year for poison hemlock in Minnesota. Prior to 2017, it was confirmed in isolated pockets of only eight counties. Accurate mapping and reporting led to confirmation of infestations in 17 additional counties across Minnesota, so it is spreading. A rigorous evaluation using a weed risk assessment model, was conducted on poison hemlock by the Noxious Weed Advisory Committee (NWAC).

Based on the results of a risk assessment, any weed species may be recommended for listing on the Prohibited – Eradicate, Prohibited – Control, Restricted, or Specially Regulated categories. After the poison hemlock risk assessment was completed, NWAC recommended that the species be emergency listed as a Prohibited – Eradicate species, the most severe category on the list.

Because of its current status on the Noxious Weed List, landowners are required to destroy all above and below ground parts of the plant. Most infestations are small, with just a few plants. Effective management must prevent seed production and exhaust the seedbank.

Mow before seed set to prevent movement of seed to new locations. Clean equipment, clothing, and shoes after moving through an infestation.
Herbicide applications that target rosettes in the early spring and fall can be very effective. Spring treatments of rosettes should be timed well in advance of flowering and follow-up treatments may be necessary for several years to exhaust the seed bank. If using herbicide treatments, check with your local co-op or certified landscape care expert for assistance and recommendations. There are several businesses throughout the state with certified herbicide applicators that can be hired to perform chemical applications.