Weed Science

Question 1

What are 4 ways in which weeds spread.

Answer 1

weeds can spread through seed, spores, rhizome, stolon, or tuber. Seeds can be carried by wind, water, people, animals, or vehicles.

Question 2

True or false: Weeds are more problematic in disturbed soils.

Answer 2

True. Weeds typically are more problematic in disturbed areas, including areas where the soil has
been tilled.

Question 3

Name three plant characteristics that generally can be used to distinguish herbaceous broadleaf
weeds.

Answer 3

Netlike leaf veins and growing points at the

end of each stem and in each leaf axil.

Question 4

Name three plant characteristics that generally can be used to distinguish grassy weeds

Answer 4

Parallel leaf veins, fibrous root system, and a single growing point that is located near the soil
surface. Other differences between grasses and broadleaf plants exist.

Question 5

Name three summer annuals.

Answer 5

Green foxtail, yellow foxtail, puncturevine, Russian thistle, crabgrass, kochia, and common
lambsquarters.

Question 6

Name three winter annuals.

Answer 6

Tumble mustard, Downy brome, Shepherdspurse

Question 7

Name three common biennials

Answer 7

Tansy ragwort, Common mullein, Common burdock, Bul l thistle, Poison hemlock

Question 8

Name some common simple perennials

Answer 8

Common dandelion, Curly dock, Buckhorn plantain, Broadleaf plantain, Dalmation toadflax, Pokeweed

Question 9

Name some common creeping perennials

Answer 9

Leafy spurge, Field bindweed, Canada thistle, Bermudagrass, Johnsongrass, Quackgrass, Yellow nutsedge

Question 10

During which stage are biennials growing new vegetation most actively?

Answer 10

During the rosette stage, biennials grow basal leaves and form the taproot.