invasive plants, goutweed

INVASIVE PLANT MANAGEMENT 

The FRCC works with local groups, landowners, and others interested in controlling non-native invasive plants.

Why are we concerned about invasive plants? Part of FRCC's mission is to protect and enhance the values for which the Farmington River was designated Wild & Scenic - free-flowing water, high water quality, special scenic, recreational and habitat features. Native habitat is important to protect for many species.

Our Botanist has been leading the Invasives Program for FRCC for several years. She is available to consult with anyone interested in helping to stop the spread of invasive plants within our five-town W&S area.

INVASIVE SPECICES MANAGEMENT

Hemlock Woolly Adelgid Control : The Peoples and American Legion State Forests are extensive watershed forests bordering the upper Farmington River, and are important for natural diversity, wildlife, and recreation. These forests have a large eastern hemlock component, critical for wildlife habitat, thermoregulation, and filtering of the streams that feed into the main river. FRCC has been working with Dr. Carole Cheah, Research EntomoloIMG_1921.jpeggist with the CT Agricultural Experiment Station, to continue control efforts of the hemlock woolly adelgid (HWA) through the release of Sasajiscymus tsugae, a beetle that predates on HWA. Our native Eastern Hemlock is susceptible and severely impacted by HWA, especially when also stressed by drought and other native and exotic insect pests. Hemlocks here were found to have recent heavy infestations of HWA in recent years. With climate change, these forests have also been subject to months of severe drought in summer 2020, an abnormally dry spring in 2021, and extreme summer drought in 2022, creating stressful conditions for moisture-loving hemlocks. In May of 2022, 5,050 beetles were released on infested hemlocks along the upper Farmington River at the American Legion and Peoples State Forests, with the help of volunteers from the FRCC, Friends of the American Legion and Peoples State Forests (FALPS), and staff from the CT DEEP Forestry Division, and funding from FRCC. Biological control with S. tsugae to reduce HWA pressure and impacts appear to have significantly helped hemlocks survive and initiate recovery, 5 –18 months after beetles were released, in spite of other significant stressors such as the drought.

Photo of beetle release on infested hemlocks in Peoples State Forest.

 

Please contact FRCC if you are interested in working with us to stop the spread of invasive species, or to report a suspected outbreak in your neighborhood or property.

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Invasive and Potentially Invasive Plants of The

Wild and Scenic West Branch Farmington River

E. Corrigan

Updated: 22 June 2020

 

COMMON NAME

SCIENTIFIC NAME*

1

Amur Honeysuckle

Lonicera maackii (Rupr.) Herder

2

Autumn Olive

Elaeagnus umbellata Thunb.

3

Bishop’s Goutweed

Aegopodium podagraria L.

4

Black Locust

Robinia pseudoacacia L.

5

Black Swallowwort

Cyanchum louiseae Kartesz & Gandhi

6

Burning Bush

Euonymus alatus (Thunb.) Sieb.

7

Cheatgrass, Downy Brome+

Bromus tectorum L.

8

Coltsfoot

Tussilago farfara L.

9

Common Reed

Phragmites australis (Cav.) Trin. ex Steud

10

Crested Late-summer Mint+

Elsholtzia ciliata (Thunb.) Hyl.

11

Cypress Spurge

Euphorbia cyparissias L.

12

Dame’s Rocket

Hesperis matronalis L.

13

European Buckthorn

Rhamnus cathartica L.

14

Forget-me-not

Myosotis scorpioides L.

15

Garlic Mustard

Alliaria petiolata (Bieb.) Cavara & Grande

16

Glossy Buckthorn

Rhamnus frangula L.

17

Japanese Barberry

Berberis thunbergii DC.

18

Japanese Hops

Humulus japonicus Siebold & Zucc.

19

Japanese Knotweed

Fallopia japonica (Houtt.) R. Decr.

20

Japanese Stiltgrass

Microstegium vimineum (Trin.) A. Camus

21

Lesser Celandine

Ranunculus ficaria L.

22

Moneywort

Lysimachia nummularia L.

23

Mugwort

Artemisia vulgaris L.

24

Multiflora Rose

Rosa multiflora Thunb.

25

Narrowleaf Bittercress

Cardamine impatiens L.

26

Norway Maple

Acer platanoides L.

27

Oriental Bittersweet

Celastrus orbiculatus Thun.

28

Privet+

Ligustrum cf. obtusifolium Sieb. & Zucc.

29

Purple Loosestrife

Lythrum salicaria L.

30

Ragged Robin

Silene flos-cuculi (L.) Greuter & Burdet

31

Reed Canarygrass

Phalaris arudinacea L.

32

Sheep Sorrel+

Rumex acetosella L.

33

shrub honeysuckle

Lonicera sp.

34

Slender Snake-cotton

Froelichia gracilis (Hook.) Moq.

35

Spotted Knapweed

Centaurea stoebe L. ssp. micranthos (Gugler) Hayek

36

Tree-of-heaven

Ailanthus altissima (P. Mill.) Swingle

37

Yellow Iris

Iris pseudacorus L.


* Retrieved [June 20 , 2020], from the Integrated Taxonomic Information System (ITIS) (http://www.itis.gov).

+ Potentially Invasive