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Horticulture 120 Exam 2
N/A
23
Other
Undergraduate 2
11/14/2010

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Term
Weed
Definition
An unwanted plant or a plant growing in an unwanted location
Term
Biological Control of Insects
Definition
-Hand-picked large predators
-Beneficial fauna
-Predatory insects
Term
Characteristics beneficial for weeds
Definition
-Lots of seeds
-Quick adaptation/ability to grow in many conditions
-Grows quickly/is aggressive
Term
Good companion plants
Definition
-Beans with anything but onions
-Peppers with carrots, onions, tomatoes
-Squash with corn (not potatoes)
-Potatoes with beans, broccoli, cabbage, corn, peas
Term
Types of beneficial plants
Definition
-Attractant Plants: Mint Family (parsley, thyme)
-Repellent plants: Marigolds, basil, garlic, borage
-Allies: legumes, monarda
Term
Uses of companion plants
Definition
-Provide shelter
-Pest suppression
-Nitrogen fixation
-Insect attraction
-Flavor enhancement
Term
Symptoms of viruses
Definition
-Streaking
-Curled Leaves
Term
Function of ethylene
Definition
-Ripen fruit quickly: Bananas
-Abscission and Fruit Loosening
-Increase Latex Flow
Term
Benefits of temperature modifying shelters
Definition
-Longer growing season
-Less susceptible to freeze/thaw
-Protect from disease and pests
-Faster germination
Term
How to increase genetic diversity
Definition
-Interbreeding
-GMCs
-Gene selection
Term
pH best for plants
Definition
-Slightly acidic: 5.5-7.5
-Because that is where basically all nutrients are available
Term
Example of each kind of insect pest
Definition
-Leaf Chewers: Caterpillars
-Suckers: Aphids, Mealeybugs
-Soil Pests: Cutworms
-Burrowers: Leaf Miners
Term
Irish Potato Famine
Definition
-1845-1850
-Caused by late blight in potatoes
-They only one potato variety
-Killed 1 million people
Term
Beetle Larvae
Definition
-Can live 1-3 years underground
-Eat roots of turf grasses and other plants
Term
Leaf Chewers
Definition
-Feed on leaves, soft bark, and fruits
Term
Biological Pesticides
Definition
-Eucalyptus Oil
-Pyrethrins
-Rotenone
-Tansy
-Neem Tree
Term
Auxin
Definition
-Promotes cell elongation: bending towards light
-Apical Dominance: Inhibition of dormant buds
-Inhibition of abscission
-Promotes fruit growth
-Promotes rooting
Term
Cytokinins
Definition
-Cell division
-Cell expansion
-Shoot and Organ development
-Delay Leaf Senescence
Term
Gibberellins (GA)
Definition
-Stem Elongation
-Cell Elongation
-Break Seed Dormancy
-Promote Flowering
-Promote Large Fruit
Term
Abscissic Acid
Definition
-Inhibition seed germination
-Inducer of senescence
-Regulates Stomatal Opening and Closing
Term
Jasmonates
Definition
-Retards Growth of Roots and Celeoptiles
-Promotes Leaf Senescence
-Promotes dehiscence of pollen
Term
Other Growth Regulators
Definition
-Brassinosteroids: cell elongation
-Systemin: defense against pathogen
-Enod 40: induce nod factors in root cells
-Salicylic Acid: defense responses
Term
Soil Forming Factors
Definition
-Climate
-Organic Material
-Parent Rock Material
-Topography
-Time
-Tillage/Compaction from traffic
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