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David Clement, Extension Specialist and Plant Pathologist, explains two common concerns homeowners have with their pine trees in the fall season: browning foliage and “what are these growths?” (hint: they’re just pine cones).
“Now when you reap the harvest of your land, you shall not reap to the very corners of your field, nor shall you gather the gleanings of your harvest.”
This passage from Leviticus 19:9 refers to the ancient practice of gleaning food after the harvest leaving food in the field for those in need. This ancient practice in spirit and deed are just as relevant today. In keeping with Community Food Rescue’s goal to feed more and waste less, we’ve partnered with University of Maryland Extension (UME), UME Montgomery County Master Gardeners, and the Montgomery County Food Council to glean food that is not economically viable for commercial harvest.
This year, thanks to generous gleaning opportunities from Red Wiggler Community Farm, Butler’s Orchard, and Farm at Home, we’ve gleaned 248 lbs. of strawberries, 338 lbs. of blueberries, 32 lbs. of sweet potato vines, and 600 pounds of apples. The gleaned fresh produce was donated to Washington Grove and Sally K. Ride Elementary Schools, The Judy Center at Summit Hall Elementary School, and CFR network members.
Sweet Potatoes: More than Just a Tuber
Blog excerpt courtesy of Red Wiggler Community Farm:
On August 20th, 2018 we invited a group of volunteers to our site at Ovid Hazen Wells Park to glean sweet potato greens. This project was a partnership between Community Food Rescue, University of Maryland Extension, School of Supplementary Nutrition Education, the UME Montgomery County Master Gardeners, and The Montgomery County Food Council. We welcomed the opportunity to have this group work with growers to harvest a portion of this plant that has historically been underutilized.
Sweet potato greens have a surprising history in the Mid-Atlantic region of North America. Many Americans enjoy sweet potatoes during the holidays, as harvesting is at its peak from October to early December. While most associate eating sweet potatoes with the tuberous root portion of the plant, West African & Asian communities have incorporated the greens into their culinary practices for ages.
Like beet greens, the greens of sweet potatoes can be sautéed and prepared as a main or side dish. The leafy treats are packed with nutrients; in fact, they tend to hold three-times more vitamin B6, five-times more vitamin C, and close to ten-times more riboflavin than the root of the sweet potato.
Despite the apparent value of this part of the sweet potato, farmers often waste this part of the plant because of a lack of demand from commercial entities. Red Wiggler was thrilled to welcome our partner organizations to assist in delivering this super green to Shepherd’s Table, a nonprofit that has provided food to low-income families in Montgomery County for over 30 years.
Gleaning, Cooking, Eating, Sustaining
Shepherd’s Table Chef Christina Moore cooked the greens a few days after harvest as part of their chicken dinner for 120 people. “The guests loved them, and I got to try something new! Feel free to send any more our way!!”
Gleaning provides the opportunity to learn about modern-day issues in our community. Red Wiggler Community Farm Executive Director, Woody Woodroof joined the October 20th staff and gleaners for lunch and discussed food waste and food insecurity in Montgomery County. Woody summed up the big picture perspective of gleaning explaining, “partnerships like these allow Red Wiggler to give back while pursuing its long-term sustainability goals.”
Republished with permission from Community Food Rescue, with thanks to Program Director Cheryl Kollin and Outreach Coordinator Susan Wexler.
I thought I was doing the right thing. When I moved into my house 11 years ago, I found a purple barberry shrub (Berberis thunbergii) planted in the back yard by the previous owner. I thought right away, it had to go. I knew Japanese barberries, so commonly planted in landscapes, were escaping into natural woodland areas and creating dense thickets to the exclusion of native plants. These thickets have been shown to make suitable habitat for Blacklegged Ticks. I wanted no part in contributing to that situation, so I donned my work gloves and removed that prickly beast of a shrub.
In the barberry’s place, I planted a “native” purple-leaf ninebark, Physocarpus opulifolius ‘Diabolo’. It had deep burgundy foliage that made a nice replacement for the burgundy-toned barberry. And, I was selecting a Maryland native plant. I thought it was a perfect choice.
I sang praises about this ninebark for years when people asked me for native plant recommendations. It has great spring blooms, beautiful foliage color, and I never had to prune it. And native plants support native insects so I was doing a good thing to help wildlife. I was doing the right thing!
Or so I thought.
It was just this year that I learned from my colleague, native plants specialist Dr. Sara Tangren, that this particular cultivar of the native ninebark was actually detrimental to a specific native insect, the Ninebark Leaf Beetle. My heart just sunk when I heard this. I am first and foremost a plant enthusiast, but I also appreciate insects—the essential roles they play in our world as well as their often stunning beauty. And when I looked up the Ninebark Leaf Beetle, I discovered that it is indeed a beauty. And then my heart sunk even further. My purple ‘Diabolo’ ninebark, it turned out, was no good for this native beetle. The alteration in the leaf color – changing the green of the native species to the burgundy of the cultivar – makes it distasteful to the beetle.
The effects of altered leaf color on plant-feeding insects was noted in a new study published in HortTechnology magazine last month. The authors (Baisden et al.) conducted experiments on several native woody plant cultivars compared to the straight natural species. They looked at whether six altered traits in the cultivated varieties – leaf color, variegation, fall color, growth habit, disease resistance, and fruit size – had any effect on insect feeding, development, and abundance.
In all three experiments they conducted, the researchers found that the cultivars with leaves that were altered from green to red, blue, or purple deterred insect feeding. Results were not consistent for the other cultivar traits they tested.
There are a couple hypotheses as to how leaf color affects insect feeding. Most plant pigments are compounds that do not contribute to the growth of a plant. They may instead provide a defense mechanism. Anthocyanin pigments make a red coloration that may warn insects that the plant has defensive, distasteful chemicals – and they stay away.
The question of whether cultivars of native plants – nativars – have positive or negative effects on native wildlife is an active and ongoing area of research. Results in past studies have been mixed. (For more on this topic, see Mt. Cuba Center research).
I know how appealing it is to choose plants with special characteristics – the colored foliage, bigger flowers, the more compact form or general appearance that suits my personal taste. But my choices may not, in some cases, be to the taste of other things in our environment and the things that depend on them for food. It is a dilemma. I do like specific non-native plants (I’ll never give up my dahlias), but I also adore the lilting songs of chickadees in the springtime. Many birds like Carolina chickadees need caterpillars to feed their young and many caterpillars can only feed on wild, native plants. See New Smithsonian Study Links Declines in Suburban Backyard Birds to Presence of Nonnative Plants. I should note that a different study (Craves) found that native birds, including chickadees, were able to find insect food on non-native, invasive Amur honeysuckles. (Which makes the issue even more confusing, right?)
“When we try to pick out anything by itself, we find it hitched to everything else in the Universe.” – John Muir
For an ecologically minded gardener, it feels complicated to sort this all out and do the right thing. I felt disappointed that my ‘Diabolo’ ninebark was a missed opportunity to support a particular native insect, but, as Dr. Trangren explained to me, it becomes more of a problem when cultivated nativars cross-pollinate with the wild species and change the genetics of the native populations, making them less capable of supporting insects on a broader scale. For this reason, she recommends choosing cultivars that are sterile.
It was a lesson learned and one that makes me more thoughtful about my plant choices and their broader impacts.
By Christa K. Carignan, Maryland Certified Professional Horticulturist; Coordinator, University of Maryland Extension Home & Garden Information Center.
Craves, Julie A. 2017. Native birds exploit leaf-mining moth larvae using a new North American host, non-native Lonicera maackii. Écoscience, 24:3-4, 81-90.
Baisden, Emily C., Douglas W. Tallamy, Desirée L. Narango, and Eileen Boyle. 2018. Do cultivars of native plants support insect herbivores? HortTechnology 28(5) 596-606.
Narango, Desirée L., Douglas W. Tallamy, and Peter P. Marra. Desirée. 2018. Nonnative plants reduce population growth of an insectivorous bird. Proceedings of the National Academy of Sciences of the United States of America.
Learn more about native plants on the University of Maryland Extension Home & Garden Information Center website.