The flashcards below were created by user
Anonymous
on FreezingBlue Flashcards.
-
a solution cannot be mechanically ________
separated
-
suspension
a mixture of finely divided solid particles dispersed in a liquid
-
most suspensions will have this appearance
cloudy
-
spike 80w is formulated as a wettable powder and forms a _______when mixed with water for application
suspension
-
emulsion
a mixture that occurs when one liquid is dispersed (as droplets) in another liquid.
-
emulsions will have this appearance and will need this to keep from separating
-
formulation selection 6 concerns
- applicator saftey
- environmental concern
- pest biology
- available equipment
- surfaces to be protected
- cost
-
solid formulations are divided into 2 groups
-
solid formulation that are ready to use and those to be mixed with water
- ready to use - dusts, granules, pellets
- mixed with water - wettable powders, dry flowables, soluble powders
-
dusts -D
- D; manufactured by the sorption of an active ingredient onto a finely ground, solid inert such as talc, clay, or chalk
- excellent coverage, but inhalation and drift hazard
-
dust no longer used in
large scale outdoor situation, drift hazard
-
granules -G
- G; similar to dusts but active ingredient is sorbed onto a larger particle ( clay, sand, or plant material)
- low inhalation and dermal hazard
-
drawback to granules
- bulk
- handling
- uniform
- application
- attractive to birds
-
granules are applied_______and intended for
dry, soil
-
pellets -P, PS
- P, PS; similar to granules, but active ingredient is combined with inert materials.
- uniform in size and shape
-
pellets are typically used in
spot applications with high degree of safety for user; but can roll downhill
-
wettable powders -W, WP
- W, WP; finely divided solids, typically mineral clays, to which an active ingredient is sorbed
- add water and spray
- require agitation
- can plug up the works
-
dry flowables aka dispersible granules -DF
DF; manufactured like wettable powders but the powder is aggregated in the granular particles
-
water dispersable granules; WDG
- soluble powders; not common
- mixed with water in spray tank where they dissolve and form a true solution prior to spraying
-
liquid formulations (4 types)
- liquid flowables
- microencapsulates
- emulsifiable concentrates
- solutions
|
|