195 survey responses Most Common and Troublesome Weeds in Broadleaf Crops Fruits amp Vegetables 1 alfalfa 2 canola 3 cotton 4 fruits amp nuts 5 peanut 6 pulse crops 7 soybean 8 sugarbeets 9 vegetables cole crops greens 10 vegetables cucurbits 11 vegetables fru ID: 701028
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Slide1
2016 Results for the U.S. & Canada
(195 survey responses) Most Common and Troublesome Weeds in Broadleaf Crops, Fruits & Vegetables
1) alfalfa, 2) canola, 3) cotton, 4) fruits & nuts, 5) peanut, 6) pulse crops, 7) soybean, 8) sugarbeets, 9) vegetables- cole crops, greens 10) vegetables- cucurbits, 11) vegetables- fruiting, and 12) vegetables- other
Common weeds
refer to those weeds you most frequently see.Troublesome weeds are those that are most difficult to control, but may not be widespread.
WSSA’s Composite List of Weeds is used for weed common and latin nameshttp://wssa.net/wssa/weed/composite-list-of-weeds/
Suggested citation
: Van
Wychen
L (2016) 2016 Survey of the Most Common and Troublesome Weeds in Broadleaf Crops, Fruits & Vegetables in the United States and Canada. Weed Science Society of America National Weed Survey Dataset. Available: http://wssa.net/wp-content/uploads/2016-Weed-Survey_Broadleaf-crops.xlsx Slide2
Top 5 Weeds in Alfalfa
(24 survey respondents)
MOST
COMMON
MOST TROUBLESOME
1mustard spp. (19)*
2
dandelion (9)
2
foxtail spp. (9)
4
pigweed spp. (8)
4Bromus spp. (8)
1Canada thistle (9)*1mustard spp. (9)3dandelion (8)4downy brome (cheatgrass) (7)5kochia (5)
* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.
- mustard spp. included shepherd’s-purse, flixweed, tansymustard spp., field pennycress, yellow rocket, and blue, tumble and tall hedge mustard.
- foxtail spp. included giant and green foxtail.
pigweed spp. included redroot pigweed.
Bromus spp. included downy brome (cheatgrass) and cheat.Slide3
Top 4 Weeds in Canola
(9 survey respondents)
MOST
COMMON
MOST TROUBLESOME
1wild oat (5)*
1
kochia (5)
1
wild buckwheat (5)
4
Galium spp. (4)
4green foxtail (4)
1kochia (7)*2Galium spp. (5)2wild buckwheat (5)4wild oat (4)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.
- Galium spp. included catchweed bedstraw (cleavers) and false cleavers.Slide4
Top 5 Weeds in Cotton
(19 survey respondents)
MOST
COMMON
MOST TROUBLESOME
1morningglory spp. (21)*
2
Palmer amaranth (18)
3
Urochloa spp. (9)
4
crabgrass spp. (7)
5barnyardgrass (6)
1morningglory spp. (19)*2Palmer amaranth (18)3horseweed (marestail) (7)4nutsedge spp. (6)5johnsongrass (5)
* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.
- morningglory spp. included ivyleaf and pitted morningglory.
Urochloa spp. included broadleaf signalgrass and Texas and browntop millet.
crabgrass spp. included large crabgrass.
nutsedge spp. included yellow nutsedge.Slide5
MOST
COMMON
MOST
TROUBLESOME
1Conyza spp. (4)*
2
Tie among 7 species (2)
1
Conyza spp. (5)*
2
field bindweed (4)
3
Canada thistle (3)
3horsenettle (3)3eastern poison-ivy (3)Top 4 Weeds in Fruits & Nuts(10 survey respondents)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.- Conyza spp. included horseweed (marestail) and hairy fleabane.Slide6
MOST
COMMON
MOST
TROUBLESOME
1Palmer amaranth (5)*
2
nutsedge spp. (4)
2
Texas millet (4)
1
nutsedge spp. (6)*
2
Palmer amaranth (4)
3Tie among 5 species (2)Top 3 Weeds in Peanuts(5 survey respondents)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.- nutsedge spp. included yellow and purple nutsedge.Slide7
Top 5 Weeds in Pulse Crops
(15 survey respondents)
MOST
COMMON
MOST TROUBLESOME
1common lambsquarters (12)*
2
pigweed spp. (8)
3
kochia (7)
4
Tie among 4 species (5)
1
common lambsquarters (10)*2kochia (7)3nightshade spp. (6)4Tie among 5 species (5)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.pigweed spp. included redroot pigweed and Powell amaranth.nightshade spp. included hairy and eastern black nightshade.Slide8
MOST
COMMON
MOST
TROUBLESOME
1waterhemp (34)*
2
horseweed (marestail) (32)
3
common lambsquarters (30)
4
foxtail spp. (27)
5
morningglory spp. (26)6
Palmer amaranth (24)7velvetleaf (23)1waterhemp (43)*1horseweed (marestail) (43)3Palmer amaranth (37)4
giant ragweed (32)
5
morningglory spp. (25)
6
common lambsquarters (24)
7
common ragweed (20)
Top 7 Weeds in Soybeans
(66 survey respondents)
* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.
- foxtail spp. included giant, green and yellow foxtail.
- morningglory spp. included ivyleaf, pitted, and tall morningglory.Slide9
MOST
COMMON
MOST
TROUBLESOME
1common lambsquarters (10)*
2
redroot pigweed (9)
3
kochia (7)
4
foxtail spp. (5)
1
common lambsquarters (10)*
2kochia (8)3pigweed spp. (7)4hairy nightshade (3)Top 4 Weeds in Sugarbeets(10 survey respondents)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.- foxtail spp. included green and giant foxtail.pigweed spp. included redroot pigweed and Powell amaranth.Slide10
MOST
COMMON
MOST
TROUBLESOME
1pigweed spp. (3)*
1
common lambsquarters (3)
1
crabgrass spp. (3)
1
mustard spp.
(4)*
2
Tie among 3 species (2)Top 3 Weeds in Vegetables- Cole Crops, Greens(5 survey respondents)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.pigweed spp. included redroot pigweed.mustard spp. included shepherd’s-purse and wild radish.crabgrass spp. included large crabgrass.Slide11
MOST
COMMON
MOST
TROUBLESOME
1pigweed spp. (8)*
2
nutsedge spp. (5)
3
crabgrass spp. (4)
3
purslane spp. (4)
1
pigweed spp. (7)*
2nutsedge spp. (6)3purslane spp. (4)3nightshade spp. (4)Top 4 Weeds in Vegetables- Cucurbits(9 survey respondents)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.pigweed spp. included redroot pigweed.nutsedge spp. included yellow and purple nutsedge.crabgrass spp. included large and southern crabgrass.purslane spp. included common and pink purslane.nightshade spp. included eastern black and black nightshade.Slide12
MOST
COMMON
MOST
TROUBLESOME
1pigweed spp. (5)*
1
common lambsquarters (5)
3
nutsedge spp. (4)
3
crabgrass spp. (4)
3
nightshade spp. (4)
1nightshade spp. (8)*2nutsedge spp. (6)3pigweed spp. (4)4Tie among 3 species (3)Top 4 Weeds in Vegetables- Fruiting(10 survey respondents)
* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.
pigweed spp. included redroot pigweed.
nightshade spp. included eastern black, American black, and hairy nightshade.
nutsedge spp. included yellow and purple nutsedge.
crabgrass spp. included large crabgrass.Slide13
MOST
COMMON
MOST
TROUBLESOME
1pigweed spp. (10)*
1
common lambsquarters (10)
3
barnyardgrass (7)
4
nightshade spp. (6)
1
pigweed spp. (8)*
2nutsedge spp. (6)2nightshade spp. (6)4common lambsquarters (5)Top 4 Weeds in Vegetables- Other(13 survey respondents)* number of survey respondents who listed the weed species as one of their top 5 weeds in this crop.pigweed spp. included redroot pigweed.nutsedge spp. included yellow nutsedge.nightshade spp. included hairy and eastern black nightshade.Slide14
Top 10 Most
Common Weeds among all Broadleaf Crops, Fruits, and Vegetables(195 total survey respondents)
MOST
COMMON
1
common lambsquarters (80)*2
pigweed spp. (71)
3
foxtail spp. (62)
4
Palmer amaranth (56)
5
morningglory spp. (55)6
crabgrass spp. (41)7waterhemp (40)8horseweed (marestail) (38)9common ragweed (33)10Echinochloa spp. (32)* number of survey respondents who listed the weed species as one of their top 5 weeds.pigweed spp. included redroot and smooth pigweed and Powell amaranth.foxtail spp. included green, giant, and yellow foxtail.
morningglory spp. included ivyleaf, pitted, and tall morningglory.
crabgrass spp. included large and southern crabgrass.
Echinochloa spp. included barnyardgrass and junglerice.Slide15
Top 10 Most
Troublesome Weeds among all Broadleaf Crops, Fruits, and Vegetables(195 total survey respondents)
* number of survey respondents who listed the weed species as one of their top 5 weeds.
morningglory spp. included ivyleaf, pitted, and tall morningglory.
nutsedge spp. included yellow and purple nutsedge.pigweed spp. included redroot and smooth pigweed and Powell amaranth.MOST TROUBLESOME
1
Palmer amaranth (66)*
2
common lambsquarters (60)
3
horseweed (marestail) (55)
4
morningglory spp. (54)5
waterhemp (49)6nutsedge spp. (46)7pigweed spp. (42)8kochia (35)9common ragweed (33)9giant ragweed (33)