chemical control

Question 1

Define chemical control

Answer 1

the use of a chemical substance to prevent/kill destructive weeds/pests/diseases

Question 2

what four key areas are controls classified under?

Answer 2

chemical, biological, physical, cultural

Question 3

what are the benefits of chemical control?

Answer 3

rapid control and products easily available

Question 4

What are the disadvantages of chemical control?

Answer 4

products can be dangerous to humans and animals

Question 5

what is an example of a popular synthetic insecticide?

Answer 5

DDT

There are concerns about its long term effects

Question 6

6 hazards of chemicals?

Answer 6

poisonous to humans/pets/farm life/ bees/ wild animals

contaminates streams and dams

build up of chemicals leads to toxic levels in humans/pets/wildlife/farm animals

rodents/insects/mites/fungi can develop resistant strains

cancer-inducing effects in humans

herbicides can damage cultivated and wild plants

Question 7

How can you minimize risks with chemical use?

Answer 7

restrict application-use only when essential.
store securely away from pets and kids.

avoid spillage

measure correct dosage

wear correct PPE

Read instructions

Avoid spray drift esp with herbicides (avoid when dry/windy)

Apply correctly-don’t double dose

Choose least harmful product