Module 2

Question 1

Weed seeds that are eaten by animals

Answer 1

May be viable due to break down of hard seed coats

Question 2

The best managed fields will have only a few hundred weed seeds per acre

Answer 2

False

Question 3

Under field conditions pigweed seeds can survive

Answer 3

About 40 years

Question 4

Innate Dormancy

Answer 4

Genetically controlled and the seed must have an after-ripening period

Question 5

Reasons a seed may not germinate include

Answer 5

• Chemical inhibitors in the seed coat
• Low pH and warm temperatures
• Hot dry conditions
• Cold flooded conditions

Question 6

Because seeds are delicate intensive control measures will eliminate the weed seed bank after a few years

Answer 6

False

Question 7

Almost all weed species only germinate once during a season. After it goes beyond a certain environmental conditions (for example, moist warm conditions in spring) it will no longer geminate that season

Answer 7

False

Question 8

Most seeds germinate

Answer 8

From the top 2 inches

Question 9

The fate of seeds that are produced during a cropping year

Answer 9

Some shatter before harvest

Question 10

Harrington weed seed destructor

Answer 10

is highly effective but only works if weed seed have not shattered prior to harvest

Question 11

Fall Herbicide Applications

Answer 11

May be recommended especially if winter annuals, biennale and perennials are problematic