07-22-2014, 05:46 AM
Environmental Impact of Pesticides
Pesticides contamination may effect the environment in a variety of ways. It may come from pesticide spills, wash water from cleanup sites, leaks from storage sites, and improper disposal of pesticides and their containers.
The pesticide may also enter the environment by drift of pesticides, pesticides in the air, pesticide runoff in to water ways and movement of pesticides to ground water.
Indirect Effects:
Aadverse effects caused by the modification or elimination of wildlife habitat or food supply are called the Indirect Effects of pesticides.
• Herbicides can reduce food, cover and nesting sites for wildlife
• Insecticides can reduce insects that serve as food supply for other animals
• Plant pollination can be effected by reductions in populations of bees and other plant pollinators
Acute Poisoning:
A short exposure to some pesticides that may kill or sicken wildlife is called acute Poisoning.
• Fish kills caused by pesticide residues carried into waterways by
run-off, drift, etc. (e.g., fish kills in Mississippi River resulting from
Guthion use in Louisiana)
• Bird kills caused by birds consuming pesticide-treated
vegetation/insects, pesticide granules, bait or treated seed
(e.g., birds poisoned by eating granular carbofuran)
Chronic Poisoning:
Exposure to non-lethal levels of pesticides over extended periods can cause reproductive effects,
etc. is called chronic Poisoning.
• Populations of bald eagles and other birds of prey were reduced
by the widespread use of organochlorine insecticides (DDT) in
1950s and 1960s
• These compounds and metabolites caused reproductive effects
in birds
• Reduction in use of organochlorine insecticides in the 1970s and
early 1980s resulted in greatly improved reproduction and
increasing bird populations
Secondary Poisoning:
Occurs when animals consume prey that contain pesticide residues and concentrate the pesticide
in their bodies (i.e., bioaccumulation) resulting in their poisoning
• Predators become sick after feeding on dead or dying animals
poisoned by pesticides.
• When dead rats that are poisoned by rodenticides are eaten by
cats or dogs they become sick.
• Pesticide residues move up the food chain (plants eaten by
plant feeding animals which in turn are eaten by predators)
Truly Pest Solution Pvt. Ltd. (Truly Nolen International, USA)
Pesticides contamination may effect the environment in a variety of ways. It may come from pesticide spills, wash water from cleanup sites, leaks from storage sites, and improper disposal of pesticides and their containers.
The pesticide may also enter the environment by drift of pesticides, pesticides in the air, pesticide runoff in to water ways and movement of pesticides to ground water.
Indirect Effects:
Aadverse effects caused by the modification or elimination of wildlife habitat or food supply are called the Indirect Effects of pesticides.
• Herbicides can reduce food, cover and nesting sites for wildlife
• Insecticides can reduce insects that serve as food supply for other animals
• Plant pollination can be effected by reductions in populations of bees and other plant pollinators
Acute Poisoning:
A short exposure to some pesticides that may kill or sicken wildlife is called acute Poisoning.
• Fish kills caused by pesticide residues carried into waterways by
run-off, drift, etc. (e.g., fish kills in Mississippi River resulting from
Guthion use in Louisiana)
• Bird kills caused by birds consuming pesticide-treated
vegetation/insects, pesticide granules, bait or treated seed
(e.g., birds poisoned by eating granular carbofuran)
Chronic Poisoning:
Exposure to non-lethal levels of pesticides over extended periods can cause reproductive effects,
etc. is called chronic Poisoning.
• Populations of bald eagles and other birds of prey were reduced
by the widespread use of organochlorine insecticides (DDT) in
1950s and 1960s
• These compounds and metabolites caused reproductive effects
in birds
• Reduction in use of organochlorine insecticides in the 1970s and
early 1980s resulted in greatly improved reproduction and
increasing bird populations
Secondary Poisoning:
Occurs when animals consume prey that contain pesticide residues and concentrate the pesticide
in their bodies (i.e., bioaccumulation) resulting in their poisoning
• Predators become sick after feeding on dead or dying animals
poisoned by pesticides.
• When dead rats that are poisoned by rodenticides are eaten by
cats or dogs they become sick.
• Pesticide residues move up the food chain (plants eaten by
plant feeding animals which in turn are eaten by predators)
Truly Pest Solution Pvt. Ltd. (Truly Nolen International, USA)