Lecture 12 - Pesticide Names and Formulations

Question 1

6 components to pesticide name

Answer 1

• molecular formula
• structural formula
• chemical family name
• chemical name
• common name
• trade name
• modified trade name

Question 2

common name and group of sexthoxydim

Answer 2

common name: sethoxydim
group 1: ACCase inhibitors

Question 3

why would you want to know common name instead of trade name

Answer 3

• patents expire
• multiple trade names exist for one product
• trade names change across borders
• trade names can also include tank mixes

Question 4

2 basic forms of pesticides

Answer 4

1. require water as carrier
2. applied directly (granulars)

Question 5

3 main components of pesticide

Answer 5

-active ingredient
-carrier
-adjuvant

Question 6

active ingredient

Answer 6

compound responsible for controlling pest

Question 7

types of carriers

Answer 7

-liquid (water or organic solvent)
-solid (dust or granular)
-gas (aerosol)

Question 8

t/f: the active ingredient, in pure form, is typically effective

Answer 8

f, it is almost never in a useable form and must be transformed into a useable product

Question 9

to be accepted by user, formulated herbicide must be:

Answer 9

effective, safe, convenient, stable, and cost effective

Question 10

pesticide formulation

Answer 10

preparation of pure compound in form of actual commercial product for practical use

Question 11

suspension

Answer 11

when particles are suspended in a solvent/not completely dissolved

Question 12

carriers have ______ activity by themselves

Answer 12

no

Question 13

can carriers cause solvent burn

Answer 13

yes, high rates of surfactants can cause burn

Question 14

water is ______

Answer 14

polar

Question 15

what kind of herbicides wont dissolve in water

Answer 15

non polar

Question 16

what needs to be added to a tank to formulate non-polar herbicide to dissolve in water

Answer 16

emulsifiable concentrate to help product stay suspended in water

Question 17

types of solid carriers

Answer 17

dusts, pellets, and granules

Question 18

adjuvants

Answer 18

any substance in a pesticide formulation or added to the spray tank to modify biological activity or application characteristics

Question 19

why are adjuvants used

Answer 19

-to enhance performance by ensuring sufficient herbicide reaches target
-to solve application problem (drift, water quality, pH)

Question 20

types of adjuvants

Answer 20

surfactants
spreaders
oil based adjuvants
stickers

Question 21

surfactants (wetters)

Answer 21

improve the wetting, spread, dispersing, and emulsifying properties of the pesticide by lowering surface tension

Question 22

spreaders

Answer 22

help form uniform coatings on treated surfaces

Question 23

oil based adjuvants

Answer 23

affect leaf surfaces to allow better contact/absorption

Question 24

stickers

Answer 24

resist wash-off by rain

Question 25

what kinds of weeds are surfactants used on

Answer 25

ones with thick cuticle and/or hairy, such as cleavers, lambs quarters