lecture 1

Question 1

current definition of a weed

Answer 1

native or introduced species that has a perceived negative ecological or economic effect on agriculture or natural systems

Question 2

3 things that makes a plant ‘weedy’?

Answer 2

1) resistance
2)dormancy
3)competition

Question 3

a successful weed is specialized or non- specialized?

Answer 3

non specialized

Question 4

ideal weed: annual with high or low seed production?

Answer 4

high - leads to high multiplication rates

Question 5

ideal weed: perennial , high or low vegetative reproduction

Answer 5

high - regen from fragments, breaks apart easily

Question 6

ideal weed: high or low output under favorable conditions

Answer 6

High

Question 7

ideal weed: high or low longevity

Answer 7

high - hard seedcoats

Question 8

ideal weed: annuals that germinate under a wide or small range of environmental conditions?

Answer 8

wide

Question 9

ideal weed: fast or slow seedling growth?

Answer 9

rapid

Question 10

ideal weed: length of vegetative stage

Answer 10

short - flower ASAP

Question 11

ideal weed: only self compatible or mix

Answer 11

mix

Question 12

ideal weed: high or low phenotypic plasticity

Answer 12

high - non-genetic variation in response to enviroment