Pesticide License Flashcards
List the four major pest groups
- weeds (unwanted plants)
- Invertebrate (insects etc.)
- Plant disease agents (fungi, viruses, bacteria)
- Vertebrates (birds or rodents)
Why is accurate pest identification essential for effective control?
The damage could be caused by something else. Misidentification could cause you to choose the wrong control method or apply it at the wrong time.
Describe the basic conditions for a pest to survive
Food, water, shelter
Define action threshold
Population control measure which measures population level for a specific pest at which come control measures are justified in order to avoid economic loss
Describe three non-chemical control options:
Biological: use of natural enemies to control pests
Mechanical: Cultivation (physically remove pests), exclusion (create barriers against pest), trapping (physically capture pests)
Cultural: Cultural (altering environment so pest is les likely to survive), sanitation (eliminating basic conditions for pest to survive
What are the advantages of non-chemical control?
has less of an impact on the soil, humans, and other life in the area
List the four major types of pesticides and what each controls
- Herbicides: weeds
- Insecticides: insects
- Fungicides: plant diseases
- Rodenticides: control mice and rats
What are the advantages of pesticides use
it is effective, it acts quickly, there are reasonable costs to it
explain how pest life cycle can control decisions
informs managers of when damage is most likely to occur and when the pest is most susceptible to the pesticide
Explain why some pest application sites are regarded as sensitive?
The sites could be near people who are sensitive to the pesticides (children or elderly, immunocompromised) or in highly populated areas (schools, hospitals, daycares), or could be near environmentally sensitive areas (wetlands, rare habitats)
Explain how site history can inform management?
it shows how well various control methods have worked in the past, potential impacts on the environment, and how treatment can be improved
List 6 factors that cause applications to fail
- Misidentification of pests
- Application at the wrong time in the insects life cycle
- Wrong pesticide
- Pesticide resistance
- wrong concentration of pesticide
- Applied at wrong time of day
Define pesticide resistance
The ability of a pest to grow resistant to a pesticide after long period of use in a singular area
Selective vs. non - selective pesticides
Selective: control only specific groups of pests or only affect a certain stage of development
Non-selective: control a wide variety of pests
Persistent vs non-persistent
Persistent: last for days, weeks, or months
Non-persistent: last only for a short period of time such as hour
Active Ingredient
Chemicals which control the pests
Inert Ingredient
Primary solvent and carriers which help deliver the active ingredient
Solution
When the solute (active ingredient) is dissolved in a solvent (liquid)
Emulsion
when one liquid is dispersed into another liquid, agitation is required to keep from separating
Suspension
finely divided particles dispersed in a liquid but not dissolved
Dust formations
solid formation, ready to use, absorption of active ingredient into chalk, cay, or talc; simple lightweight; great coverage; inhalation or drift hazard
Granule formation
solid formation, ready to use, active ingredient is absorbed into a larger particle such as clay or plant material, heavier and can be carried through foliage to the ground, reduced inhalation hazard, difficulty for uniform coverage, may attract birds but need to be in soil
Pellet formation
solid formation, ready to use, similar to granules, inert materials mixed with active ingredient to form a slurry which is then extruded under pressure to produce a pellet, used in spot application, high degree of safety, have potential to roll and harm non-target vegetation or contaminate water
wettable powders
solid formation, mixed with water, finely divided solids in which an active ingredient is added to water and applied as a liquid spray, low dermal hazard, less likely to burn vegetation, inhalation hazard, requires agitation to prevent settling
dry flowable/ water dispersible granules
solid formation, mixed with water; manufactured the same way as wettable powders except the powders is aggregated into granular particles, reduced inhalation hazard, pour more easily from container
soluble powders
solid formation, mixed with water, form a true solution when mixed with water, don’t need agitation, aren’t abrasive to equipment, inhalation hazard prior to mixing
water soluble concentrates
water soluable active ingredients idssoved in water to be further dissolved by applicator, forms true solution, no agitation needed, can be caustic to human skin
liquid flowable/flowable/suspension concentrates
powder/dispersion agent is mixed with water before packaging, mixture form a suspension with the water requiring further dilution, applied as spray, no inhalation hazard, difficulty removing product from container during mixing, loading, rinsing
micro capsules
a solid or liquid inert surrounded by a plastic or scratch coating which can be aggregated to form dispersible granules suspended in water and sold as a liquid formulation, enhances safety while providing timed release
emulsifiable concentrates
oil soluble active ingredient dissolved in appropriate oil based solvent and emulsifying agent is added concentrates are mixed with water and sprayed, some agitation is required to maintain, not abrasive to equipment and do not lug screens, present dermal hazard, readily penetrate oily barrier like skin, can burn foliage, can degrade rubber equipment
Fumigant
deliver the active ingredient to the target site in the form of a gas, can completely fill a space and have great penetrating power, extreme inhalation danger
adjuvant
compound that facilitates the action of pesticides or modifies characteristics of pesticide formulations or spray solutions
list common examples of major types of adjucants
a: surfactants
b: spreaders
c: stickers
d: Anti-foam agents
e: buffering agents
f: compatibility agents
sate the best source of info on when an adjuvant may be needed
pesticide product label will tell recommendations or warnings
define the term pesticide (im)compatability
when two products are combined in the same tank form an unsuitable mixture for spraying
list the general mix order when multiple products are tank mixed
- Fill tank 1/3 of way with water
- Start agitation
- Add suspension products
- Add solution products
- Add emulsifiable concentrates
- Add surfactants or other adjuvants
- Add additional water
Acute vs chronic toxicity
Acute: single pesticide exposure for a short period of time
Chronic: delayed long term effects over multiple acute exposures; effects organs and nervous systems
List common routes of exposure
Dermal: through skin
Respiratory: through lungs
Oral: through mouth