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WEED CONTROL
WEED CONTROL
17
Architecture
Undergraduate 4
02/18/2015

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Cards

Term
Mechanical Control (term)
Definition
The use of a physical activity or barrier to remove or inhibit the growth of weeds
Term
Mowing
Definition

Mech. Control

-Disadvantages

     -Weeds must be erect and upright

     -Can spread seeds

Term
Hand pulling
Definition

Mech. Control

-Advantages

    -Very selective

    -Minimal impact on environment

-Disadvantages

     -Time and labor intensive

     -crop can be trampled

Term
Mulching
Definition

Mech. Control

-Can be both inexpensive or expensive

-Advantages

  -deprives weeds of sunlight and moisture

-Disadvantage

  -doesnt control all weeds

Term
Tillage
Definition

Mech. Control

-Advantages

  -Controls weeds by uprooting or burying or both

-Disadvantages

  -Costly

Term
Chemical Control (term)
Definition
Any pesticide that is used to kill or interupt the growth of unwanted plants
Term
Herbicide Advantages
Definition

-Reduce need for human labor

-Controls weeds when other measures cant

-Can be used when tillage is not possible or desired

-Often effective after one application

Term
Herbicide Disadvantages
Definition

-Applicator mus have liscense

-Pose health risks to environment and humans

-Volitile herbicides could injury off target plants

-Crop injury

-Soil persistance

-Herbicide resistance

Term
Mode of Action
Definition

Sequence of events from first contact with plant to the death of plant

Term
Ideal herbicide properties
Definition

-Applied in small amount

-Applied in different ways

-Doesnt cause cancer

-Easy to apply

-High selectivity

-Low mammal toxicity

-Low soil solubility

-Low volatility

-Rapid biodegradeable

Term
Classic or Inoculative
Definition

Bio. Control

-Introduced natural enemy against introduced pest

-Ecological approach

Term
Augmentative or Inundative
Definition

Bio. Control

-Introduced or native natural enemy against introduced or native pest

-Technologial approach

Term
Conservation of Natural Enemies
Definition

Bio. Control

-Enhancing or protecting naturally ocurring enemies

-an ecological approach

Term
Biological control disadvantages
Definition

-Lag period

-No guarantee of results

-Unknown ecological effects

-Potential BC agents may be low

Term
Biological Control (term)
Definition
Use of naturally occuring organisms to maintain a target weeds population at a lower density than would naturally occur
Term
Broad spectrum or grazing management
Definition

Bio. Control

-Polyhagous natural enemies confined to ensure restricted action

-technological approach

Term
Biological control advantages
Definition

-Control is limited to target weed and a few close relatives

-Few harmful side effects

-High benefit to cost ration for successful programs

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