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WorksheetsMG19 Weeds
Total questions: 20
Worksheet time: 10mins
Perennial weeds that live for more than two years and grow year after year from the same root include:
dandelion and pokeweed
chickweed and henbit
mullein and garlic mustard
ragweed and lamb's quarter
Weeds can:
indicate unsuitable growing conditions for desired plants
affect yield and quality of agricultural products
harbor pests
all of these
An exotic species whose introduction causes economic or environmental harm or harm to human life is the federal government's definition of a(n):
noxious species
invasive species
quarantined species
weed species
Which of the following statements about portable propane flamers is false?
they eliminate perennial weeds
they cause plant cells to rupture
they cause weeds to wilt
their effects are similar to vinegar and contact chemicals
Post-emergence broadleaf herbicides are best applied:
when daily temperatures are between 65° and 85°
when temperatures are below 65°
in the summer, when temperatures are above 90°
in the fall, after several hard freezes
The product Preen can contain the herbicide:
Trifluralin
Glyphosate
2, 4-D
All of these
All of the following about glyphosate and triclopyr are true except:
both can control perennial and woody weeds
both can control grasses and sedge weeds
both have systemic post-emergent activity
both can be applied to "cut surfaces."
A neighbor asks your advice about the best way to eradicate weeds that are growing in driveway cracks. Suggest any of the following except:
boiling water
hand weeding
5% acetic acid (vinegar)
glyphosate
