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Hemlock Woolly Adelgid Quarantine
Hemlock Woolly Adelgid Compliance
Hemlock Woolly Adelgid FAQs
What You Should Know About The Hemlock Woolly Adelgid
- It feeds on Carolina, eastern and several exotic hemlock species often sold in local nurseries.
- It is now established in 12 eastern states from North Carolina to Maine, and has caused widespread mortality of hemlocks in forest and suburban settings.
- Hemlock is an important component of the New England forest ecosystem. Hemlock is the third most prevalent tree in Vermont. It provides protection from erosion along stream banks, shelter in the winter for deer and is an important food source for birds and other wildlife. In addition, it is an important source of lumber and is valued as an ornamental because of its graceful form.
- Several individual infestations on introduced nursery stock were discovered in New Hampshire and Maine and destroyed.
- Control of this pest with insecticides in forests is often impractical because thorough coverage of the dense foliage is difficult to achieve, and hemlock commonly grows near rivers or wetlands where these compounds cannot be used.
- Several registered pesticides, such as insecticidal soap and dormant oil, are effective against this pest, and can be used on ornamental plantings of hemlock.
- Several biological control agents are being studied in the hope of devising effective long-term management of hemlock woolly adelgid.
- Birds have been implicated in the spread of this pest.
- A quarantine against this pest was established in Maine, New Hampshire and Vermont. Homeowners and nurseries cannot bring hemlock seedlings or trees from adelgid-infested states into these states without an inspection permit certifying they are pest-free.
- In areas that are not currently infested, the threat of hemlock woolly adelgid does not justify changing forest plans or rushing to salvage hemlock lumber. Even after forestland is infested, hemlocks do not die immediately, and a salvage cut can be done before that occurs.
- Here are some informative websites on hemlock woolly adelgid:
http://www.fs.fed.us/na.morgantown/fhp/hwa/hwasite.html
http://www.cce.cornell.edu/suffolk/grownet/tree-insect/hemwool.html
http://www.uri.edu/ce/factsheets/sheets/hemadelgid.html
http://www.hort.uconn.edu/ipm/homegrnd/htms/46wooly.htm
List of Approved Resistant Ribes
Black Currants
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Consort, Crusader, and Coronet - All three are from an Ontario breeding program. Coronet needs cross pollination for good fruit set. Quality and yields are fair.
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Titania - As the name implies, fruits are large (and yields and fruit quality are excellent). This is the best one to plant.
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Crandall - Plant is often grown for its ornamental, yellow flowers and red fall foliage.
Red Currants
- Rondom, Rolan, Rubina, Jhonkheer van Tets - All are from a breeding program in the Netherlands.
- Viking - An old selection from Europe-impossible to find in US (unfortunately).
White Currants
- White Currant 1301 - High yielding, late. From Sweden.
Black Currant-Goosebery Crosses
- Jostaberry - From Germany. Blackish fruits with bland flavor produced on thornless plants.
- ORUS10 - Developed in Oregon. Fruits are small and dark. Plants are thorny.
Gooseberry
- Jahns Prairie - A joint USDA/Ag Canada release. Fruits are red and flavorful.
Ribes Permit
FOREST PEST ADVISORY GROUP -
The purpose of the Forest Pest Advisory Group is to provide a forum for public agencies and private organizations to discuss forest pest problems that impact New Hampshire, and to make recommendations relative to forest pests to the Commissioner of the Department of Agriculture, the Commissioner of the Department of Resources and Economic Development, and the State Forester.
PRESS RELEASE:
Dangers of Transporting Firewood into NH
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