Classification of pesticides based on toxicity
What is the basis for classification of pesticides according to toxicity?
The classification, according to their toxicity, pesticides can be classified as extremely dangerous, highly dangerous, moderately dangerous and slightly dangerous. According to their median lifetime, they are classified as permanent, persistent, moderately persistent and not persistent.
WHO classification pesticides toxicity?
The WHO Recommended classification of pesticides by hazard categorizes pesticide active ingredients according to their acute oral and dermal toxicity (that is, the hazard of single or multiple exposure over a relatively short period of time). For some pesticides, chronic toxicity has also been taken into account.
What are the three methods of classification of pesticides?
Classification of pesticides are according to the types of pests they kill. Grouped by the pest types they Kill; Insecticides – Insects. Herbicide – Plants.
What are the four categories of toxicity?
The four toxicity categories, from one to four are:
- Toxicity category I is Highly toxic and Severely irritating,
- Toxicity category II is Moderately toxic and Moderately irritating,
- Toxicity category III is Slightly toxic and Slightly irritating,
- Toxicity category IV is Practically non-toxic and not an irritant.
What is the toxicity of pesticides?
Acute toxicity of a pesticide refers to the effects from a single dose or repeated exposure over a short time (e.g. one day), such as an accident during mixing or applying pesticides. Acute toxicity is measured by LD50 and LC50 values. The smaller the LD50, the more toxic the pesticide.
What are the different types of toxicity?
Types. There are generally five types of toxic entities; chemical, biological, physical, radiation and behavioural toxicity: Disease-causing microorganisms and parasites are toxic in a broad sense but are generally called pathogens rather than toxicants.
How many classifications of pesticides are there?
four
Classification of pesticides
Based on chemical composition, pesticides are classified into four main groups namely; organochlorines, organophosphorus, carbamates and pyrethrin and pyrethroids.
What are the two main classifications of pesticides?
Miticides (also called acaricides) kill mites that feed on plants and animals. Microbial pesticides are microorganisms that kill, inhibit, or out-compete pests, including insects or other microorganism pests.
What is pesticide and its classification?
Grouped by Types of Pests They Kill
Insecticides – insects. Herbicides – plants. Rodenticides – rodents (rats & mice) Bactericides – bacteria. Fungicides – fungi.
What is Category 3 toxicity?
EPA Toxicity Categories
| EPA Toxicity Categories | ||
|---|---|---|
| Toxicity Study | Category I High Toxicity | Category III Low Toxicity |
| Acute Oral | Up to and including 50 mg/kg | > 500 thru 5000 mg/kg |
| Acute Dermal | Up to and including 200 mg/kg | > 2000 thru 5000 mg/kg |
| Acute Inhalation | Up to and including 0.05 mg/liter | > 0.5 thru 2mg/liter |
What are the 7 categories of pesticides?
Types of Pesticides
- Insecticides – insects.
- Herbicides – plants.
- Rodenticides – rodents (rats & mice)
- Bactericides – bacteria.
- Fungicides – fungi.
- Larvicides – larvae.
What is a Category 1 pesticide?
Pesticides that are classified as highly toxic (Toxicity Category I) on the basis of either oral, dermal, or inhalation toxicity must have the signal words DANGER and POISON printed in red with a skull and crossbones symbol prominently displayed on the front panel of the package label.
What is a Class 3 poison?
Toxicity Class III
“Harmful if swallowed“, “May be harmful if absorbed through the skin”, “May be harmful if inhaled”, or “May irritate eyes, nose, throat, and skin” Class III materials are estimated to be fatal to an adult human at some dose in excess of 30 grams.
How many classifications of pesticides are there?
four
Classification of pesticides
Based on chemical composition, pesticides are classified into four main groups namely; organochlorines, organophosphorus, carbamates and pyrethrin and pyrethroids.
What is the most toxic pesticide?
Paraquat is one of only two pesticides still used in the United States that is either banned or being phased out in the European Union, China and Brazil. It’s the most acutely lethal herbicide still in use today and has resulted in the death of at least 30 people in the United States in the past 30 years.