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Insecticides. Chemicals that are used to kill that are pests. 1st Generation. mixtures containing. - lethal to both bugs AND humans. e.g. . tropical legume. tobacco. African chrysanthemum. Plants are a “natural” place to look for insecticides because they. spines.

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Presentation Transcript
slide1

Insecticides

Chemicals that are used

to kill that are pests.

1st Generation

  • mixtures containing

- lethal to both bugs AND humans

slide2

e.g.

tropical legume

tobacco

African

chrysanthemum

slide3

Plants are a “natural” place to look for insecticides because they

spines

thorns

poisons

sensitive plant

slide6

Characteristics of DDT:

  • broad – spectrum:
  • persistent:
slide7

DDT changed world history by:

  • preventing a

among the Allied soldiers

invading Italy during WWII

slide9

increasing

worldwide

slide10

won the Prize in Chemistry

for the synthesis of DDT.

slide13

DDT was banned in Canada in & in the U.S.in 1972, but it is

still being used in some countries (e.g.- ).

slide14

To cope with these problems, which it had itself created, the

World Health Organization was obliged to parachute into Borneo.

slide15

Characteristics of Modern Insecticides

Therefore, they CAN’T

cause bioaccumulation.

slide16

Problems with Pesticides

  • Because most pesticides are broad-spectrum, they kill

, not just pests.

slide18

Doctors are usually cautious about prescribing

for the same reason. (i.e.- Some disease-causing bacteria have become resistant to all known .)

slide19

Some pesticides have been linked to certain types of .

2,4 - D has been linked

to

Saku Koivu

slide20

Many synthetic chemicals, including pesticides, mimic

the action of the female sex hormone & may be

causing in adolescents.

Bisphenol A

slide21

The province of Ontario banned the use of

(pesticides that non-essential or used to improve the appearance

of lawns, gardens, & trees) in .

slide22

There are exceptions for agriculture, forestry, the promotion of

public health or safety (e.g.- to control plants that are poisonous

to the touch, such as ; insects that bite, sting, are venomous or are disease carrying, like mosquitoes; and animals, insects or plants that may cause damage to a structure or infrastructure, such as ), and .

slide23

The is one of North America\'s most devastating forest pests.

Both Toronto & Mississsauga have carried out

to control this pest.

slide24

Technically, the law says

you can use

or for poison

ivy, but NOT for

cosmetic purposes.

slide26

wildflowers

shrubs

trees

slide27

Go Native!

Native plants are adapted to the conditions here. They are &

than introduced species. Put away those pesticide & fertilizer bottles & turn off the sprinkler!

slide29

Organic Food

Food produced without: antibiotics;

growth hormones; most conventional ;

petroleum- based or sewage sludge-based

; bioengineering; or ionizing radiation.

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