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32 Cards in this Set
- Front
- Back
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Ungerminated seed that would not germinate even in proper conditions |
Dormant Seed |
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Seed that need water, light, or oxygen to germinate. |
Non dormant seed |
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Small new plants arising from seeds. May be important to distinguish these from new shoots arising from underground vegetative parts. |
Seedling |
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A circular cluster of leaves that forms after the early seedling stage but before a flower stalk is sent up. |
Rosette |
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Earliest stage of reproductive growth. Stage just before bloom when flower parts are forming but flower has not yet opened. |
Bud Stage |
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Flowers have opened. May be further described as early, mid or late bloom
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Bloom |
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Seed has formed in the plant is relatively in active. There is little or no energy production or movement of water and nutrients
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Maturity |
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Very early emergence stage, in which the leaves are still within the Coleoptile or tightly rolled to form a spike. Usually when the grass is less than 1 inch tall
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Spike stage |
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Formation of erect shoots or tillers from the crown of a grass. Also called stooling
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Tillering stage |
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Begins after tiller rain when the first node of the stem appears above the soil surface
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Jointing stage |
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When the inflorescence had expands the upper leaf sheath. Head is swollen but not yet visible
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Boot stage |
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Kernels or not yet ripe and gradually become more dry and firm.
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Milk and dough stage |
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When a broadleaf seedling has broken through the soil and before the stem has become erect
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Crook stage |
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Early post emergent stage of onion seedlings between the crook stage and the emergence of the first true leaf
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Flag stage |
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Growth regulators |
Phenoxys Dicamba (banvel) Picloram (tordon) Triclopyr (stinger) |
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Bipyridyliums |
Diquat (reglone) Paraquat (gramaxone) |
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FAS* Inhibitor Grass Killers |
Diclofop- methyl (hoelon) Sethoxydin (poast) Fluazifop- butyl (fusilade) Fenoxaprop (horizon,whip,tiller,acclaim,puma) Translocated in both water and sugars |
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Substituted Glycine |
Glyphosate (roundup) |
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Triazines |
Atrazine Simazine |
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Ureas |
Diuron (Karmex) Linuron (lorox) Siduron (tupersan) Controls annual and seedling grasses and broadleaves |
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Uracils |
Terbacil (sinbar) Bromacil (hyvar-x) |
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Thiocarbamates |
EPTC (eptam) Butylate (Sutan) Cycloate (ro-neet) Triallate (avendex) Vernolate (vernam) |
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Particular strains of microbes that can use a herbicide for food may gain advantage over other microbes in the soil
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Adaptive breakdown |
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An increase in population of microbes is sometimes termed
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Soil enrichment |
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Period of time during which adaptive microbes are increasing in population
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Lag phase |
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Refers to the chemical and or physical attraction of a substance to a surface
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Adsorption |
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What are the four primary soil factors that can affect the extent of adsorption.
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Texture Type of clay Organic matter content (most important) Soil moisture |
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The downward movement of a substance in solution through the soil
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Leaching |
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Herbicide most influenced by photodecomposition
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Devrinol |
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Soil __________ is likely to be the key factor in the success of soil herbicides
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Moisture |
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Not toxic to plants
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Phytobland |
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Poisonous to plants
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Phytotoxic
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