Green Roofs - Living Architecture Monitor - Summer 2019 - 20

EDITORIAL
REVIEW BOARD
Editor-in-chief: Dr. Reid Coffman
(Kent State University)
Associate Editor: Dr. Jennifer Bousselot
(Colorado State University)
Associate Editor: Dr. Tobias Emilsson
(Swedish University of Agricultural Sciences)
Dr. Brad Bass
(Environment Canada)
Dr. Robert Berghage
(Penn State University)
Dr. Maureen Connelly
(British Columbia Institute of Technology)
Dr. Nigel Dunnett
(University of Sheffield)
Bruce Dvorak, MLA
(Texas A&M University)
Barry Lehrman, MArch/MLA
(California State Polytechnic University,
Pomona)
Dr. J. Scott MacIvor
(University of Toronto)
Thomas O'Connor, MSE
(US Environmental Protection Agency)
Dr. Bill Retzlaff
(Southern Illinois University Edwardsville)
Dr. Bradley Rowe
(Michigan State University)
Virginia Russell, GRP, MLA
(University of Cincinnati)
Dr. Sabina Shaikh
(University of Chicago)
Dr. Richard Sutton
(University of Nebraska-Lincoln)
Dr. David Tilley
(University of Maryland)
Dr. Youbin Zheng
(University of Guelph)
The Journal of Living Architecture
(JLIV) is the official, peer-reviewed
journal of the Green Infrastructure
Foundation. The magazine publishes
the abstracts of each published JLIV
manuscript, with a link to the full
paper online.
LIVING ARCHITECTURE MONITOR / SUMMER 2019 / 20

The Journal of Living Architecture (JLIV) is the official, peer-reviewed journal of the Green
Infrastructure Foundation. The magazine publishes the abstracts of each published JLIV
manuscript, with a link to the full paper online.

Volume 6 Number 1 Pages 31-43

PLANT PERFORMANCE WITH AND WITHOUT NUTRIENT ADDITION
ON A LOW-MAINTENANCE GREEN ROOF IN NEW ENGLAND
Lauren Healey1, Peter Alpert1*, Michael Ea1 Biology Department, University of Massachusetts - Amherst
*corresponding author: palpert@bio.umass.edu

Little research is available on green roofs in the harsh New England climate. Performance
of 12 plant species and effects of adding soil nutrients were measured on an established
green roof in central Massachusetts over two growing seasons, starting when maintenance
ended, two years after planting. Sedum hybridum plus ellacombianum maintained about
60% cover where planted and reached 50% cover elsewhere. Other species had 0-10%
cover. Volunteer species combined had up to 60% cover, bringing totals to 70-90%.
Nutrients had little effect. Low-maintenance green roofs appear feasible in New England,
but species should be locally pre-tested. Volunteers may enhance performance.

Volume 6 Number 1 Pages 44-61

ASSESSMENT OF NATURAL ENEMIES FOR PEST CONTROL
ON AN INDOOR LIVING WALL
Susan Bjørnson1*, Jay Gallant2
Department of Biology, Saint Mary's University, Halifax, Nova Scotia, Canada
2
Gallant Interior Plants, Dartmouth Nova Scotia, Canada
*corresponding author: susan.bjornson@smu.ca
1

Living walls are comprised of tropical plants that are susceptible to a variety of insect pests,
but little information is available to help achieve effective pest control on vertical plant
canopies. Although insect natural enemies can provide efficient pest control in indoor
environments, the vertical canopies of living walls present challenges for natural enemy
dispersal and success. During this six-month study, commercially-available natural enemies
were released to control aphid outbreaks and a heavy infestation of soft brown scales on an
indoor living wall. Three lady beetles were used: Lindorus (Rhyzobius) lophanthae (scale
destroyer) and Cryptolaemus montrouzieri (mealybug destroyer) were released for scale
control, and Adalia bipunctata (two-spotted lady beetle) was released to control aphids.
Chrysoperla carnea (green lacewings) were released to observe natural enemy migration.
Brown soft scale on Schefflera was reduced from 83.2 to 7.5 scales per leaflet (mid-May
to mid-October; 91% reduction). C. montrouzieri was the only natural enemy able to
establish itself on the wall, and their larvae were easy to monitor. Although the physical
environment of the upper and lower canopies differed considerably, the natural enemies
used were able to migrate freely and provide effective pest control.
Read more at livingarchitecturemonitor.com

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Green Roofs - Living Architecture Monitor - Summer 2019

Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Summer 2019

Table of Contents
Green Roofs - Living Architecture Monitor - Summer 2019 - IP
Green Roofs - Living Architecture Monitor - Summer 2019 - Cover
Green Roofs - Living Architecture Monitor - Summer 2019 - Cover 2
Green Roofs - Living Architecture Monitor - Summer 2019 - Table of Contents
Green Roofs - Living Architecture Monitor - Summer 2019 - A1
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Green Roofs - Living Architecture Monitor - Summer 2019 - M1
Green Roofs - Living Architecture Monitor - Summer 2019 - A2
Green Roofs - Living Architecture Monitor - Summer 2019 - A3
Green Roofs - Living Architecture Monitor - Summer 2019 - A4
Green Roofs - Living Architecture Monitor - Summer 2019 - A5
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