Lecture 1 Flashcards
When do Summer Annuals die?
die with 1st frost
Most common Winter annual:
Poa Annua
Crabgrass germination:
Mid April in mid-Atlantic zone Is a summer annual.
Goosegrass is also known as:
Silver Crabgrass
Goosegrass germinates before or after Crabgrass?
After
Foxtail is what kind of weed? When does it germinate?
Summer Annual.
Late Summer
Japanese stiltgrass is what kind of weed? When does it germinate?
Summer Annual - germinates mid April in mid Atlantic zone
What conditions does Japanese Stiltgrass thrive?
Shady sites
What type of weed is Fall Panicum?
Summer annual
When does Fall Panicum flower?
late June - October.
Define Fall Panicum seed head structure:
Seed heads can be 6-12” long and 3-6” wide. Pyramid shaped–long and whispy
What kind of grass is Barnyard Grass?
Summer Annual
Weeds compete with other plants for what?
Light Space Water Nutrients
Name the Summer Annuals
• Crabgrass • Goosegrass • Foxtail (few species) • Japanese Stiltgrass • Panicum • Barnyardgrass
What type of soil does Goosegrass thrive in?
Poorly Drained, compacted soil
All Summer Annuals begin to germinate around when? What does the Soil temp need to be?
Mid- April greater than 68 degrees F.
What are the two types of Crabgrass called?
- Smooth 2. Large or Hairy
Crabgrass Specifics:
Annual or Perennial?
Germination and growth period?
What does it like?
Physical characteristics?
- 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.
Goosegrass Can Compete In Golf Greens Maintained At
≤ ?
0.12”
Where would you typically find Goosegrass? Wht kind of Soil and Temperature?
Found in compacted poorly drain soils in warm
climates
What makes Goosegrass seedlings different than Crabgrass seedlings?
Goosegrass seedlings lack “hair”
WHen is Yellow Foxtail most invasive and competitive?
In Spring-Seeded Cool-Season Grasses
Where would you most likely find Yellow Foxtail?
Poorly nourished, open turf areas.
WHen does Foxtail typically germinate?
Late Summer
