Weed Management Exam 1 ACTUAL UPDATED Questions and CORRECT Answers
Terms in this set (151)
weed Plants that interfere with the growth of desirable plants and are unusually
persistent. They damage cropping systems, natural systems, and human activities
and as such are undesirable.
noxious spreads easily or has toxicity
Because some weeds or volunteer crops are not as Why is the physical location a bad definition of a weed?
competitive as true weeds, produce less seed, will not
take over fields, or die over winter.
, discontinuous germination The ability of weed seeds to germinate at different times rather than all at once,
allowing them to survive unfavorable times and emerge then circumstances are
optimal.
invasive species Non-native plant species that are introduced to a region and spread aggressively,
displacing native vegetation and disrupting ecosystems.
Characteristics of successful weeds Can germinate in many environments, discontinuous germination, survive
dormant, rapid development, can make seed in poor conditions, and
continuously, self-pollinated, no need for pollinators, abundant seed production,
easily dispersed seeds, brittleness in perennials, asexual reproduction, ability to
compete or survive.
250,000 how many plant species are in the world?
200 How many plant species are weedy?
90 200 weed species cause ___% of all crop loss in the world.
25 Each crop has around ___ weed species that cause the most issues.
No, management is key Are weed problems static?
invasive weeds Bush honeysuckle, Hydrilla. Cogon grass, and kudzu are all examples of what?
Bush honeysuckle What is this?
Hydrilla What is this?
Cogon grass What is this?
Kudzu What is this?
Management What greatly affects the weeds that are prevalent?
Terms in this set (151)
weed Plants that interfere with the growth of desirable plants and are unusually
persistent. They damage cropping systems, natural systems, and human activities
and as such are undesirable.
noxious spreads easily or has toxicity
Because some weeds or volunteer crops are not as Why is the physical location a bad definition of a weed?
competitive as true weeds, produce less seed, will not
take over fields, or die over winter.
, discontinuous germination The ability of weed seeds to germinate at different times rather than all at once,
allowing them to survive unfavorable times and emerge then circumstances are
optimal.
invasive species Non-native plant species that are introduced to a region and spread aggressively,
displacing native vegetation and disrupting ecosystems.
Characteristics of successful weeds Can germinate in many environments, discontinuous germination, survive
dormant, rapid development, can make seed in poor conditions, and
continuously, self-pollinated, no need for pollinators, abundant seed production,
easily dispersed seeds, brittleness in perennials, asexual reproduction, ability to
compete or survive.
250,000 how many plant species are in the world?
200 How many plant species are weedy?
90 200 weed species cause ___% of all crop loss in the world.
25 Each crop has around ___ weed species that cause the most issues.
No, management is key Are weed problems static?
invasive weeds Bush honeysuckle, Hydrilla. Cogon grass, and kudzu are all examples of what?
Bush honeysuckle What is this?
Hydrilla What is this?
Cogon grass What is this?
Kudzu What is this?
Management What greatly affects the weeds that are prevalent?
