Poaceae

Question 1

Name 5 Poaceae weeds.

Answer 1

Avena fatua
Cynodon dactylon
Lolium rigidum
Poa annua
Sorghum halepense

Question 2

Period of appearance of Poaceae weeds

Answer 2

AL - winter (A. fatua and L. rigidum)
CS - Summer - Autumn (C. dactylon, S. halepense)
P. annua - all year

Question 3

Crops affected by Poaceae weeds.

Answer 3

A. fatua, L. rigidum - cereals
C. dactylon - Many crops (citrus, olives, sugarcane)
P. annua - maize, sugarbeet, pastures
S. halepense - sorghum, maize, cotton, pastures.

Question 4

Which Poaceae species have vegetative reproduction?

Answer 4

Cynodon dactylon - stolons and rhizomes

Sorghum halepense - rhizomes

Question 5

Is herbicide resistance reported in Poaceae species we are studying?

Answer 5

Yes, in all except Cynodon dactylon

Question 6

Special threats of Avena fatua.

Answer 6

Large root system with a high uptake of phosphorus and nitrogen

Question 7

Special threats of Cynodon dactylon.

Answer 7

Fast-growing, very drought tolerant, recover quickly after a fire, tolerates several weeks of flooding.

Question 8

Special threats of Lolium rigidum.

Answer 8

High genetic diversity and phenotypic plasticity.

Question 9

Special threats of Poa annua.

Answer 9

It grows in a wide variety of soils, tolerates trampling, mowing, and frozen conditions, outcompetes other plants.

Question 10

Special threats of Sorghum halepense.

Answer 10

Extensive spreading rhizome and shoot system, high seed production, reduces soil fertility, host for crop pathogens, fire resistant, toxic and allergen