Amaranthaceae

Question 1

Name five important Amaranthus species.

Answer 1

Amaranthus retroflexus
Amaranthus hybridus
Amaranthus blitoides
Amaranthus palmeri
Chenopodium album

Question 2

What time of the year do the Amaranthaceae weeds usually appear?

Answer 2

Summer.

Question 3

The main mode of reproduction for the weeds of the family Amaranthaceae ?

Answer 3

Seed

Question 4

Are Amaranthaceae weeds herbicide-resistant?

Answer 4

Yes, all the species.

Question 5

Where do Amaranthaceae weeds occur?

Answer 5

Irrigated crops - horticultural, maize, cereals

Non- irrigated - fruits and cereals

Question 6

What 2 Amaranthaceae species have special threats?

Answer 6

Amaranthus retroflexus

Amaranthus palmeri

Question 7

What are the special threats associated with A. retroflexus?

Answer 7

Seeds have long viability and are easily dispersed by wind, water, and machinery. High variability in seed germination makes post-emergence herbicide control difficult.

Question 8

What are the special threats associated with A. palmeri?

Answer 8

Prolific seed production and persistent seeds. Emerges throughout the growing season making management complex.

Question 9

Is there any vegetative reproduction in the weeds of Amaranthaceae that we’re studying?

Answer 9

No