Lecture 1

Question 0

When do Summer Annuals die?

Answer 0

die with 1st frost

Question 1

Most common Winter annual:

Answer 1

Poa Annua

Question 2

Crabgrass germination:

Answer 2

Mid April in mid-Atlantic zone Is a summer annual.

Question 3

Goosegrass is also known as:

Answer 3

Silver Crabgrass

Question 4

Goosegrass germinates before or after Crabgrass?

Answer 4

After

Question 5

Foxtail is what kind of weed? When does it germinate?

Answer 5

Summer Annual.

Late Summer

Question 6

Japanese stiltgrass is what kind of weed? When does it germinate?

Answer 6

Summer Annual - germinates mid April in mid Atlantic zone

Question 7

What conditions does Japanese Stiltgrass thrive?

Answer 7

Shady sites

Question 8

What type of weed is Fall Panicum?

Answer 8

Summer annual

Question 9

When does Fall Panicum flower?

Answer 9

late June - October.

Question 10

Define Fall Panicum seed head structure:

Answer 10

Seed heads can be 6-12” long and 3-6” wide. Pyramid shaped–long and whispy

Question 11

What kind of grass is Barnyard Grass?

Answer 11

Summer Annual

Question 13

Weeds compete with other plants for what?

Answer 13

Light Space Water Nutrients

Question 14

Name the Summer Annuals

Answer 14

• Crabgrass • Goosegrass • Foxtail (few species) • Japanese Stiltgrass • Panicum • Barnyardgrass

Question 15

What type of soil does Goosegrass thrive in?

Answer 15

Poorly Drained, compacted soil

Question 16

All Summer Annuals begin to germinate around when? What does the Soil temp need to be?

Answer 16

Mid- April greater than 68 degrees F.

Question 17

What are the two types of Crabgrass called?

Answer 17

1. Smooth 2. Large or Hairy

Question 18

Crabgrass Specifics:

Annual or Perennial?

Germination and growth period?

What does it like?

Physical characteristics?

Answer 18

• Digitaria spp (smooth and hairy).
• Summer annual.
• Germinates in spring and grows all summer
• Likes full sunlight.
• Light in color, seed heads appear like fingers on the terminal of seed stalk.
• Plants produce a very large number of seeds that are viable for future years.

Question 19

Goosegrass Can Compete In Golf Greens Maintained At

≤ ?

Answer 19

0.12”

Question 20

Where would you typically find Goosegrass? Wht kind of Soil and Temperature?

Answer 20

Found in compacted poorly drain soils in warm
climates

Question 21

What makes Goosegrass seedlings different than Crabgrass seedlings?

Answer 21

Goosegrass seedlings lack “hair”

Question 22

WHen is Yellow Foxtail most invasive and competitive?

Answer 22

In Spring-Seeded Cool-Season Grasses

Question 23

Where would you most likely find Yellow Foxtail?

Answer 23

Poorly nourished, open turf areas.

Question 24

WHen does Foxtail typically germinate?

Answer 24

Late Summer

Question 25

How was Japanese Stiltgrass likely introduced to the US?

Answer 25

It was used as a packing materials for fragile items. It showed up in boxes at ports on the east coast.

Question 26

What is Japanese Stiltgrass also refered to as?

Answer 26

Nepalese browntop

Question 27

How tall can Fall Panicum grow to?

Answer 27

3ft tall

Question 28

Is Barnyard grass a Summer Annual or Summer Perennial?

Answer 28

Summer Annual

Question 29

WHen does germination occur in Barnyard grass?

Answer 29

Spring through October.

Question 30

How tall can Barnyard grass grow?

Answer 30

1 - 4ft tall

Question 31

Describe the seeds of Barnyard grass:

Answer 31

Seeds are flat on one side and round on the other

Purple in Color and grow in clumps

.- seeds are called ‘chicken foot’

Question 32

Describe the color of the stem base of Fall Panicum

Answer 32

stem base is white to pale green or purple

Question 33

Answer 33

Barnyard Grass

Question 34

Answer 34

Crabgrass

Question 35

Answer 35

Fall Panicum

Question 36

Answer 36

Fall Panicum

Question 37

Answer 37

Foxtail

Question 38

Answer 38

Goosegrass

Question 39

Answer 39

Goosegrass