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49 Cards in this Set
- Front
- Back
A pest is:
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any bug plant bacteria virus fungus varmit that competes w/ our intrests
one bug might eat aphids w/h is beneficial while another bug eats a plants roots w/h is very bad and makes that bug a PEST |
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The best way to look at this is to have a strategy(s) to keep a pest pop. at a level thats eco & detrimental are acceptable.
we want to SUPPRESS the pest pop to ... |
an acceptable level. And we know that amt of control depends on the level of infestation.
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What is ERADICATION?
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total elimination of a pest
its rarely advised UNLESS: the pest damage is $$$ on crops or plantings or serves as a VECTOR (carrier) of disease. |
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INTEGRATED PEST MANG. IPM
what is IPM? |
the use of all available tactics or strategies to attain a eco acceptible yield or plant quality while causing least disruption to the enviro
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we need pest knowledge
life cycles pest's relations to hosts why? |
to know what times to kill them
there are certain times bugs are vulnerable in their life cycle. |
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A pest is:
|
any bug plant bacteria virus fungus varmit that competes w/ our intrests
one bug might eat aphids w/h is beneficial while another bug eats a plants roots w/h is very bad and makes that bug a PEST |
|
The best way to look at this is to have a strategy(s) to keep a pest pop. at a level thats eco & detrimental are acceptable.
we want to SUPPRESS the pest pop to ... |
an acceptable level. And we know that amt of control depends on the level of infestation.
|
|
What is ERADICATION?
|
total elimination of a pest
its rarely advised UNLESS: the pest damage is $$$ on crops or plantings or serves as a VECTOR (carrier) of disease. |
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INTEGRATED PEST MANG. IPM
what is IPM? |
the use of all available tactics or strategies to attain a eco acceptible yield or plant quality while causing least disruption to the enviro
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we need pest knowledge
life cycles pest's relations to hosts why? |
to know what times to kill them
there are certain times bugs are vulnerable in their life cycle. |
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what is biological monitoring called
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scouting
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scouting sampling trapping are ways to measure pest ?
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population levels
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so monitoring weather temperatures and moisture alerts the pest manager to what
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potential severity of pest outbreaks WHICH influences timing of control measures
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sanitation can decrease fungi bacteria viral pop which reduces what
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need for pesticide treatments
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there are parasitic and predacious insects that work to maintain
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pest pop at acceptable levels
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reducing incestide use protects
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good bugs like ladybird beetles and wasps that eat catapillers and aphids
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we need to detect a bug problem before it IS a problem
not doing so |
increases control costs
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sometimes a bug problem is obvious
sometimes you have to look close, find a plant that |
does not look right
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to uncover a bug problem, get good at detecting a problem we need to
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understand normal plant growth
freq monitoring of fields greemhouses ornamental planting turf an ability to see a problem know about bugs disease and what are good organisms |
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most bugs are not a problem OR are actually good bugs. so the rule here is to
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truly know what is causing a problem before we start spraying
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a species can be a problem in one situation but not in another!
Use the Cooperative Extension office because |
they have books and pampletes on pest identification and control options
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knowing a pest's life cycle is essential
why |
so you can apply a spray at a susceptible life stage
some can be as adults others as babies but spraying at a nonvulnerable stage does little |
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this really isn't about killing bugs this is about
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saving a crop and the crops value
Dealing with plant diseases its more critical to identifing the problem correctly and control it at the optimal time |
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only try controling a pest when its causing a $$ problem or aesthetic problem. But remember ...
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nothing is gained if the cost of controlling a pest is more than the damage it is causing
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when determing a pest problem is causing an economic threat consider
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pest pop
geo location plant variety plant growth stage cost of control value of crop |
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THRESHOLDS
the discussion here is economic injury level you need to apply control measure b/f reaching what |
the ECONOMIC INJURY LEVEL
this is called the ECONOMIC THRESHOLD (theres 2 thresholds) |
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The idea here is NOT reaching the EIL economic INJURY level. what is the economic injury level?
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the EIL is where damage is greater than control costs.
this means your losing money trying to fight the bugs |
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so that was the EIL
What is EL? |
EL is enonomic threshold
this is where have to act to prevent reaching EIL |
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EL & EIL so what?
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the EL or economic threshold is also called the action threshold or treatment threshold.
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Is the EL when damage is first seen?
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A plant may tolerate a great deal of damage b/f control is needed.
But other plants? maybe show little damage but its there. |
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this idea of ET been around long time. for major crops and pest systems. what do we need to determine EL and EIL?
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lots of information needed to est EL
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discussion of pest damage includes enviro conditions but largely what affect pest activity and population levels?
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unpredictable variable affect
1) suscetibility of plants 2) pest activity / pop levels |
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METHODS OF PEST CONTROL
pesticides are usually first choice of bug control b/c |
its the cheapest
but this brings in the enviro human animal enviro health look for alternatives w/h is the following discussion |
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RESISTANT VARIETIES
planting resistent variety plants to bugs whenever possible plant pest resistant plants why? |
avoiding a pest infestation is easier to do than fighting a pest infestation.
use of resistant varieties is important in disease mang. |
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CROP ROTATION
what can crop rotation offer in this discussion of pest control? |
crop rotation works in ag as a control method. creates optimal growing conditions for the plant or unfavorable conditions for bugs.
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CULTURAL CONTROL METHODS
what are cultural methods to control pests? |
cultural control methods:
create optimal growing conditions for the plant or unfavorable conditions for the pest. tillage varying planting time fertilizing irrigating pruning thinning |
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other methods are more directly related to pest control
what? |
planting trap crops! let the bugs eat the trap crop
sanitation practices removal of plant residuals that harbor disease |
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EXs of cultural control are:
change watering / vent patterns to prevent moss in greenhouses water & fertilizer birch trees freq to help w/stand bronze birch borer attack what else? |
plant winter wheat late to avoid Hessian fly
prune veg to let more light into areas infected w/ powdery mildew remove elm trees infected w/ Dutch elm disease |
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Mechanical & Physical Control
a form of cultural control mechanical & Phy control do what? |
prevent the spread or reduce size of the pest pop
mechanical traps barriers light sound heat cold electrocution remember crop production doesn't use these methods BUT can be effective in ornamental landscapes and greenhouses! EX spuashing an aphid on a rose is mechanical control! Using a water spray to wash bugs off a plant works! |
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REGULATORY CONTROLS
this is legal controls how? |
restricting human activity
fed state local regulations provide backbone like: quarantines inspections embargoes compulsory plant / animal destruction |
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Biological Control
makes the most of the effect NATURAL enemies have on pests. how? |
1,000s of bugs and their disease agents are predators and parasites of ag / ornamental plant pests. So make every effort to not kill these bugs! This means carefull selections of control methods, esp pesticides
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By the way, predators (wasps) and parasites have INTENTIONALLY been introduced from outside the US. Like what?
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Ladybird beetles
parasitic wasps |
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ladybird beetles
lacewings syrphid flies parasitic wasps ants control insects in large and small scale ag and urban situations. so what? |
use management strategies to enhance the activities of biological control organisms!
Its a long term strategy. requires scientists and biological control programs etc |
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SANTITATION control
involves what? |
cleanup efforts
removing rotten wood etc eliminate breeding sites some techniques remove water or food of pests! EX removing piles of rotten potatoes reduces volunteer plants that are source of blight fungus |
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some sanitation practices are:
pathogen free seed stock pathogen free propogation planting sites removing infected plants what is pathogen free seeds? |
making clean seed reduces plant disease spread
pathogen free propagation is growing path free vegation in a nursery. planting sites is where we can control / reduce disease by eliminating other plants ie weeds that are hosts for disease. Wheat stem rust was removed when barberry was eradicated |
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removing infected plants
disease can be managed by removing infected plants or plant parts b/f disease speads. what else |
burn or remove infected plants or plant parts from a site to rid area of the pest organism
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CHEMICAL controls
essential component of pest control program and always will. great for large or rapidly growing pest pop. what else? |
chemical control is usually the most effective economic or only way to control bugs
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EVALUATION
see if your strategy is working. if not what? |
change strategy. consider costs and long term consquences. ie pesticide resistance / enviro concerns
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KEEPING CURRENT
bugs disease mang strategies are always changing. so what? |
keep up stay aware of the potential of chemical resistance, intro of new pests, advancements in mang techniques.
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