Insecticides
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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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Insecticides

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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

thorns

poisons

sensitive plant


Natural does NOT always mean


2nd Generation


Characteristics of DDT:

  • broad – spectrum:

  • persistent:


DDT changed world history by:

  • preventing a

    among the Allied soldiers

    invading Italy during WWII


  • preventing millions from dying because of


  • increasing

    worldwide


won the Prize in Chemistry

for the synthesis of DDT.


What Went Wrong?


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

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


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

World Health Organization was obliged to parachute into Borneo.


Characteristics of Modern Insecticides

Therefore, they CAN’T

cause bioaccumulation.


Problems with Pesticides

  • Because most pesticides are broad-spectrum, they kill

    , not just pests.


  • If an insecticide is overused, can develop.


Doctors are usually cautious about prescribing

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


  • Some pesticides have been linked to certain types of .

2,4 - D has been linked

to

Saku Koivu


  • Many synthetic chemicals, including pesticides, mimic

    the action of the female sex hormone & may be

    causing in adolescents.

Bisphenol A


The province of Ontario banned the use of

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

of lawns, gardens, & trees) in .


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 .


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

Both Toronto & Mississsauga have carried out

to control this pest.


Technically, the law says

you can use

or for poison

ivy, but NOT for

cosmetic purposes.


What are Some of the Alternatives to Cosmetic Pesticides?


wildflowers

shrubs

trees


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!


Organic Food

Food produced without: antibiotics;

growth hormones; most conventional ;

petroleum- based or sewage sludge-based

; bioengineering; or ionizing radiation.


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