Lecture 11 Flashcards
herbicide names, formulations and adjuvants
six (7) components to pesticide name
- molecular formula
- structural formula
- chemical family name
- chemical name
- common name
- trade name
- modified trade names (tank mixes)
example : sexthoxydim
Chemical family name: cyclohexanedione
Chemical name: 2-[1-(ethoxyamine) butyl]-5-[2-(ethylthio)propyl]-3-hydroxyl-2-cyclohexene-1-one.]
Common name: Sexthoxydim
Trade name: post ultra
Modified trade name: Poast Flax MAX
Group 1: ACCase inhibitors
why know common names?
Expiring patents
trade names change across boarders
two basic forms of pesticides in Canada (states)
1)Require water as carrier –> Dry formulations
2) applied directly –> granular
3 main component in a jug of pesticides
1) Active ingredient - controls pest
2) Carrier - liquid, solid or gas
3) Adjuvant - eliminate application problems
Formulation
Preparation of pure compound into firm for practical use
actual commercial products purchased by the end user
water as a carrier
water is polar
some herbicides will not dissolve if they are non-polar
EC - emulsifiable concentrate used to dissolve in water
emulsifiable concentrate
formulated to dissolve non- polar herbicides in water
solid carriers use
used to form solutions or suspensions
may be applied as granules
why adjuvants are needed
1) enhance performance - ensures sufficient herbicide hits target
2) solve application problem - drift, water quality, pH
surfactants
improves emulsifying, dispersing, spreading, wetting or other properties of liquid by modifying its surface characteristics
are all adjuvants universal?
No
No one size fits all
should only be used according to label recommendations
