| What's on this page |
|
Lambsquarters |
|
|
Lambsquarters (Chenopodium album) is the most widespread resistant weed of Pennsylvania
|
| |
|
|
| Introduction |
|
About this page |
| There are currently 7 different types (known as 'biotypes') of herbicide resistant weeds in Pennsylvania. The first herbicide resistant weed reported from Pennsylvania is Smooth Pigweed (Amaranthus hybridus) with resistance to atrazine, reported in 1980. Local weed scientists estimate that there are 1,510 sites and more than 12,400 acres infested with herbicide resistant weeds in Pennsylvania and they infest corn, soybean, and tomatoes. The most widespread resistant weed of Pennsylvania is Lambsquarters (Chenopodium album), which infests an estimated 1001-10000 acres and is found primarily in corn. Giant Foxtail (Setaria faberi), with resistance to foramsulfuron, imazamox, and nicosulfuron is the most recently discovered (2004) new type of resistant weed in Pennsylvania. |
|
This is a resource page to assist you in
managing herbicide-resistant weeds in Pennsylvania . If you have any questions regarding herbicide-resistant
weeds in Pennsylvania please contact an
expert in your area. If you have encountered a computer related error on the site then contact
support@weedscience.org. If you are a weed scientist wanting to add or correct information on this page then please contact
research@weedscience.org
or add the
information directly.
Scroll down this page to view tables on
herbicide resistant weeds in Pennsylvania and its adjacent states as well as a list of articles about
herbicide resistant weeds in your region. Click on the links within
the table to view a case of resistance in more detail.
|
|
|
|
HERBICIDE RESISTANT WEEDS IN PENNSYLVANIA | | Weed | Situation | Herbicide Mode of Action | Year | Smooth Pigweed
(Amaranthus hybridus) | corn | C1/5 - Photosystem II inhibitors
(atrazine) | 1980 | Lambsquarters
(Chenopodium album) | corn | C1/5 - Photosystem II inhibitors
(atrazine) | 1980 | Redroot Pigweed
(Amaranthus retroflexus) | corn, soybean, tomatoes | B/2 - ALS inhibitors
(atrazine, chlorimuron-ethyl, cloransulam-methyl, imazamox, imazaquin, imazethapyr, primisulfuron-methyl, thifensulfuron-methyl) | 1998 | Redroot Pigweed
(Amaranthus retroflexus) | corn, soybean, tomatoes | C1/5 - Photosystem II inhibitors
(atrazine, chlorimuron-ethyl, cloransulam-methyl, imazamox, imazaquin, imazethapyr, primisulfuron-methyl, thifensulfuron-methyl) | 1998 | Shattercane
(Sorghum bicolor) | corn, soybean | B/2 - ALS inhibitors
(imazamox, imazethapyr, nicosulfuron, oxasulfuron, primisulfuron-methyl) | 2001 | Horseweed
(Conyza canadensis) | soybean | G/9 - Glycines
(glyphosate) | 2003 | Giant Foxtail
(Setaria faberi) | corn | B/2 - ALS inhibitors
(foramsulfuron, imazamox, nicosulfuron) | 2004 |
|
|
|
HERBICIDE RESISTANT WEEDS IN ADJACENT STATES | | | | | | | | |
|
|
|
|
|
|
|
|
HERBICIDE RESISTANT WEED CONTACTS IN PENNSYLVANIA
|
|
Your local state
university extension agent or local department of agriculture
representative may be able to provide you with more information on
herbicide-resistant weeds in your region. Much of the information
about herbicide-resistant weeds in Pennsylvania has been
provided by the following experts.
|
STATE CONTACTS | | WILLIAM CURRAN | Pennsylvania State University
Dept. of Agronomy
Agricultural Science and Industries Bldg.
University Park, 16802, Pennsylvania
United States of America
Phone : (814) 863-1014
Fax : (814) 863-7043
Email William Curran
Web : Web Site Link |
| |
|
| Acknowledgements |
|
Where to now? |
|
The
North American Herbicide Resistance Action Committee and weed
scientists in Pennsylvania have been instrumental in providing you this information.
Particular thanks is given to William Curran, and Dwight Lingenfelter for providing detailed information.
|
|
|
|
|
|
|
|
