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24 Cards in this Set
- Front
- Back
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is phytochrome red (Pr) active or inactive?
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Inactive
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Is phytochrome far red (Pfr) active or in active?
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active
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This is the light duration corresponding to a change in plant development
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Critical photoperiod
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These plants flower during a period of long day length
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long-day plant
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These plants flower during a period of short day length
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short-day plant
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Seeds germinate under what light condition? red, dark, or red+far red?
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red light
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chlorophyll in the canopy absorbs most of the _______ but not the _________.
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red, far red
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_______ is the maximum amount of light a plant can absorb
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saturation point
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______ is the best leaf angle, which is slanted
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optimal leaf angle
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________ is the minimum temperature a plant tolerates
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cold hardiness
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__________ is the maximum temperature a plant tolerates
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heat tolerance
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_______ is the time required below a threshold temperature for successful flowering of some plants
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winter chill
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________ is the total amount of heat required for an organism to develop from one stage of development to another
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degree days
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________ is the effect of low temperatures on flower induction
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Vernalization
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What are the 4 main pest types?
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weeds, disease, invertebrates, vertebrates
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This is a plant growing when and/or where humans don't want them
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weed
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What are the three main plant pathogens?
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Viruses, Bacteria, and Fungi
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What percentage of crops are lost due to invertebrate pests worldwide?
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20%
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What are the two ways that insects use to eat a plant?
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with chewing or peircing and sucking mouth parts
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a _______ is a disease carring animal that can pass on diseases
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Vector
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What is it called when you use the three pest management types all at once?
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Integrated pest management
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What are the three types of pest management?
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Pesticides, Biological control agents, Cultural methods
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________ is when you use a pests natural enemy to kill it
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biological control
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What are the four conditions conducive to pest outbreaks?
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-monoculture
-extremes of water and fertilizer -lack of natural enemies -pest resistance to chemical pesticides |
