Deutsch: Insektizid / Español: Insecticida / Português: Inseticida / Français: Insecticide / Italiano: Insetticida
An insecticide is a substance used to kill insects. They include ovicides and larvicides used against insect eggs and larvae, respectively. Insecticides are used in agriculture, medicine, industry and by consumers.

In the environmental context, an insecticide refers to a chemical substance used to kill or control insects. Insecticides play a crucial role in agriculture, public health, and pest management. They are designed to target specific insects or groups of insects that pose threats to crops, livestock, human health, or the environment. Here are some examples and further explanations of insecticides in the environment:

1. Organophosphates:
Organophosphate insecticides are a class of chemicals that inhibit the activity of enzymes in the nervous systems of insects. They are commonly used in agriculture to control pests such as aphids, beetles, and mites. However, organophosphates can have detrimental effects on non-target organisms and the environment. Some well-known organophosphates include malathion, diazinon, and chlorpyrifos.

2. Pyrethroids:
Pyrethroids are synthetic insecticides derived from natural compounds found in chrysanthemum flowers. They are widely used in agriculture, public health, and household applications due to their effectiveness against a broad range of insects. Pyrethroids are often used to control mosquitoes, fleas, ticks, and agricultural pests. Examples of pyrethroids include permethrin, cypermethrin, and deltamethrin.

3. Neonicotinoids:
Neonicotinoids are a class of insecticides that act on the central nervous system of insects. They are commonly used in agriculture to control sucking insects like aphids, thrips, and whiteflies. However, neonicotinoids have raised concerns about their impact on pollinators, particularly bees. Some neonicotinoids include imidacloprid, clothianidin, and thiamethoxam.

4. Biological Insecticides:
Biological insecticides are derived from natural sources, such as bacteria, fungi, viruses, and plant extracts. They offer an environmentally friendly alternative to conventional insecticides. Biological control agents include Bacillus thuringiensis (Bt), a bacterium that produces toxins lethal to specific insect species, and Beauveria bassiana, a fungus that infects and kills various insect pests.

5. Systemic Insecticides:
Systemic insecticides are absorbed by plants and transported throughout their vascular systems. When insects feed on these plants, they ingest the insecticide and are subsequently affected. Systemic insecticides provide long-lasting protection against pests and are commonly used in horticulture, forestry, and crop production. Imidacloprid and clothianidin are examples of systemic insecticides.

Similar Concepts:

1. Herbicides:
Herbicides are chemicals used to control or eliminate unwanted plants, commonly referred to as weeds. They target plants' physiological processes and can be selective (affecting specific plant species) or non-selective (affecting a wide range of plants). Herbicides play a significant role in weed management in agriculture, forestry, and landscaping. Examples include glyphosate, 2,4-D, and atrazine.

2. Fungicides:
Fungicides are chemicals used to control fungal diseases in plants. They prevent or inhibit the growth and reproduction of fungi that cause plant diseases such as powdery mildew, rust, and blight. Fungicides are widely used in agriculture, horticulture, and forestry to protect crops and ensure healthy plant growth. Common fungicides include captan, mancozeb, and copper-based compounds.

3. Rodenticides:
Rodenticides are substances used to control rodent populations. They are designed to attract and kill rodents, including rats and mice. Rodenticides are used in various settings, such as agriculture, households, and industrial facilities, to prevent damage to crops, infrastructure, and potential health risks associated with rodents. Examples of rodenticides include warfarin, bromadiolone, and zinc phosphide.

4. Pesticides:
Pesticides encompass a broader category that includes insecticides, herbicides, fungicides, and other substances used to control pests. They are utilized to manage various organisms that negatively impact human health, crops, structures, and the environment. Pesticides can be synthetic or derived from natural sources and play a crucial role in integrated pest management strategies.

It is important to note that while insecticides and other pest control substances serve vital purposes in agriculture and public health, their use should be carefully regulated and monitored to minimize potential harm to non-target organisms, ecosystems, and human health.

--