Insecticides: Significance, Types, Advantages and Disadvantages


Insecticides and their significance, types, advantages, and disadvantages make the people aware of them and realize the effects of their application. They are chemical agents that are used to destroy insects. In the fields of medicine, agriculture, and industry, insecticides have wide applications. They have the ability to majorly change the components of the environment and are harmful to both animals and humans. Some insecticides are concentrated in the food chain as they disperse.

How Can Insecticides be Classified?

Based on their chemistry, their toxicological action, or their mode of absorption, insecticides can be categorized in many ways. They are graded according to whether they have an effect on your stomach, respiratory system, or body. However, most synthetic insecticides enter into all three of these pathways and are thus best differentiated by their basic chemistry from each other. Certain organic compounds that occur naturally in plants, as well as some inorganic compounds, are useful insecticides in addition to synthetics; some of these are allowed in organic agriculture applications.

Significance of the Insecticides

Pesticides are significant. By protecting crops from pests, diseases, and weeds and increasing productivity per hectare, they help the farmers cultivate more food on less land. Many applications of insecticides have made significant benefits for humans, including improved crop production because of protection from infestations and disease; prevention of excessive wastage of stored foods; and prevention of some health-conserving diseases that have saved the lives of millions of individuals and domestic animals.

In certain countries, pests kill nearly 37 percent of the major plant crop production. The use of insecticides greatly reduces this damage. Spraying of insecticide is often one of the key methods used in order to minimize the abundance of mosquitoes and other insects that transmit such diseases like malaria to humans. The use of insecticides reduces the populations of these species and so millions of individuals have been saved from the deadly or harmful effects of different diseases.

Types of Insecticides

Insecticides play a major role in the way food is produced and processed these days. Insects, rats, and bacteria will kill the crop and pollute the supplies eaten by individuals. Insecticides have been produced as a way to control this problem. Such products may be dependent on natural or chemicals.

Organic Insecticides

Oil Spray Insecticides
Oil Spray Insecticides-Ckrokill

A homemade vegetable oil insecticide combined with a mild soap can have a serious impact on some problematic insects, such as aphids, mites, and thrips. Mix one cup of vegetable oil with one tablespoon of soap to produce a simple oil spray insecticide, and then, when ready to spray, combine two teaspoons of the oil spray mixture with one-quarter of water, shake it well, and spray directly on the surfaces of the plants infected by the small insects.

Soap Spray Insecticides
Soap Spray Insecticides-Ckrokill

Soap spray, which is also successful for controlling mites, aphids, whiteflies, beetles, and other unwanted little insects, also is a very similar homemade pesticide to oil spray. To make the simple soap spray insecticide add one and a half teaspoons of mild liquid soap with one-quarter of the water and spray the mixture directly on the contaminated surfaces of the plants.

Neem Oil Insecticides
Neem Oil Insecticide-Ckrokill

An effective natural insecticide, capable of disturbing the life cycle of insects at all levels, such as adults, larvae, and eggs, is oil taken out from the seeds of the neem tree, making it a vast source for the natural gardener. Neem oil serves as a hormone disruptor for insects that live on leaves and other plants.

Neem oil is safe and non – toxic to livestock, birds, fish, and other wildlife, as well as being a natural insecticide that can fight powdery mildew and other fungal infections on plants and is active against a number of popular garden insect pests. It can be available in many garden stores or markets.

Follow the directions on the bottle to use neem oil as an insecticide, or begin with a simple mixture of two teaspoons of neem oil and one teaspoon of mild liquid soap, shaken properly with a quarter of water, and then sprayed on the affected plant leaves. By spraying the leaves of plants often attacked by pests until they are infested, neem oil could also be used preventative measure.

Garlic Insecticide Spray
Garlic Insecticide-Ckrokill

You need to take two whole bulbs and grind them with a small amount of water in a blender or food processor to create a simple garlic spray. Add half a cup of vegetable oil which is optional, one teaspoon of mild liquid soap, and sufficient water to fill up the container. Let the mixture settle overnight, and then strain it into a jar. To use this homemade insecticide, take one cup of mixture with one-quarter of water and spray generously on infected plants.

Garlic is familiar for its sharp scent, which is delightful to some and yet repellent to others, and when used as a natural insecticide, it is this powerful smell that keeps away the insects.

Diatomaceous Earth as a Natural Pesticide

Diatomaceous earth is also available at garden shops.  Simply powder the soil and sprinkle around your plants, or even spray it on the leaves, where it will help limit snails and slugs, as well as other insects that crawl. Diatomaceous earth has a variety of uses in and around the house, and it also serves as a natural insecticide.

Pepper Insecticide Spray
Pepper Insecticide Spray-Ckrokill

Chilli pepper spray is a wonderful homemade natural insect repellent that can be used for a wide range of different insects and is similar to garlic spray. Chilli spray can be produced from either fresh hot peppers or chili pepper powder. Mix one tablespoon of chili powder with one-quarter of water and few drops of mild liquid soap to make an effective spray of pepper powder. This mixture can be used on the leaves of the affected plants at maximum efficiency.

To make chili spray from fresh chili peppers, blend half a cup of peppers with one cup of water, then add one-quarter of water and bring to a boil. Let stay until the chili content is cooled, then strains it out, add several drops of liquid soap to it and spray as needed. Chilli powder and peppers could be very strong on humans as well. So make sure that wear gloves when you spray and keep the sprays away from your eyes, nose, and mouth.

All-in-One Homemade Insecticide Spray
All-in-One Homemade Insecticide Spray-Ckrokill

To make the insecticide, mash a bulb of garlic and a small onion to make it, add a teaspoon of pepper powder and allow soaking for an hour. Strain and apply one tablespoon of liquid soap to the mixture and blend well. To implement this homemade insecticide, apply it on both the upper side of the leaf and the undersides with maximum strength and, if needed, store the rest in the refrigerator for up to a week.

Tomato Leaf as a Natural Insecticide
Tomato Leaf as a Natural Insecticide-Ckrokill

To make tomato leaf spray for a natural insecticide, slice two cups of fresh tomato leaves that can be cut from the lower part of the plant and add one-quarter of water and let soak overnight. Strain the plant matter out and spray it on the leaves of the plant. Tomato leaves consist of alkaloids that can efficiently control aphids and other insects.

Inorganic Insecticides
Inorganic Insecticides-Ckrokill

These are either man-made or based on formulations like carbamates or pyrethroids that are synthetic. These are made of strong metals such as boric acid and silica gel, as well as arsenic compounds. Inorganic forms of insecticides are extremely effective, but they are used carefully and read the conditions of the application carefully. There are also some types of insecticides that are inorganic.

Systematic Insecticides
Systemic Insecticides-Ckrokill

Systematic insecticides are placed into the soil and plant roots will absorb them. These insecticides move up to the plants’ leaves roots, fruits and tree branches and prevent it from insects feeding on it. Bactericides and larvicides are also a type of systemic insecticides that assist in the elimination of plant-killing bacteria and larvae.

Chlorinated Hydrocarbons
Chlorinated Hydrocarbons-Ckrokill

Following the discovery (1939) of the insecticidal properties of DDT, chlorinated hydrocarbons were produced in the 1940s. BHC, lindane, chlorobenzilate, methoxychlor, and cyclodiene (including aldrin, dieldrin, chlordane, heptachlor, and endrin) are other examples of this category.

Some of these substances are very durable and have a higher chemical action; they are, therefore, highly important where protection is needed for a longer time. Their toxic behaviors are not well understood, but the nervous system is known to be damaged. A variety of these insecticides have been restricted because of their harmful environmental consequences.


The biggest and most powerful class of insecticides is known as organophosphates. In this class, two commonly used compounds are parathion and malathion; Diazinon, naled, methyl parathion, and dichlorvos are other substances. They are particularly effective against aphids and mites and other insects that feed on plants.

The intake of the chemicals by the plant is performed either by spraying the leaves or adding solutions to the soil fertilized with the chemicals, so that absorption takes place through the roots. Organophosphates typically have very little leftover action and are therefore necessary where insecticide selection is limited by residual tolerance levels. Usually, they are much more toxic than hydrocarbons that are chlorinated. Organophosphates kill insects by blocking cholinesterase, which is important in the functioning of the nervous system.


Carbamates are a category of insecticides agents such as carbamyl, carbofuran, and methomyl. They are inactivated easily and removed from the tissues of animals. Their toxicity is thought to result from a process very similar to that for the organophosphates.

Contact Insecticides

The popular sprays that can be used at home to remove insects and mosquitoes are Contact Insecticides. Some of these components are often used to bleach the atmosphere and home and sanitize the place. These insecticides, in the form of sprays, coils, liquid vaporizers, and repellents, are now available in the market.

Some of the major contact insecticides are:

Asana : This is also a leaf spray used to control various pest forms. If it gets into the rivers, it can be extremely dangerous to animals living in the water. You can apply it on corn, sweet potatoes, cucurbits, maize, herbs, and roots.

Aztec:  Very effective in the fight against corn rootworms, white grubs, seedcorn beetles, and cutworms. It is a mixture of pyrethroid and organophosphate that can be added to sweet corn and popcorn with Baythroid:

Brigade: The pyrethroid insecticide used for the destruction of flea beetles, aphids, leafhoppers, caterpillars, and many other insects. It is often used on all kinds of food crops as a foliar mist but is particularly dangerous to fish and bees.

Captiva: It is indeed a form of contact insecticide made from plant extracts that are more natural. It is a leaf spray that works on food and vegetable plants of all kinds. It helps in the removal of insects of all kinds and their larvae.

Declare: To get rid of various forms of insects, this insecticide is used. It is quite harmful to bees and animals which live in water. It can be used on crops such as sweet corn, onions, cabbage, tuberous vegetables, and so on.

Delta Gold: Useful for food crops such as maize, cucurbits, and vegetables. It is an insecticide used to protect various insect species and other forms of insects. It is very harmful to bees and fish, among other water-based creatures.

Insects that Seem to Look Like Bedbugs

Diazinon: An organophosphate, added before planting, used for soil sprays and primarily used for vegetables such as tomatoes, melons, and some brassicas. Cutworms, crop mole crickets, wireworms, or root maggots can be handled using it.  It is especially harmful to bees and is not suitable for greenhouses.

Distance IGR: Fights insects by preventing the embryo’s production in the egg, it also delays the metamorphosis of nymphs, larvae, and pupae before they mature into an insect and effective in repelling silver leaf, sweet potato whitefly, and even shore flies and gnats.

Knack: This insecticide is being used to control bulb vegetables and other pests against the outbreak of whiteflies, thrips, armyworms, cabbage looper, tobacco hornworm, and onion thrips. It is used on tomatoes, dried legumes, brassicas, and other root and tuber crops, and is a leaf spray. While it is not aimed at the total destruction of adult insects, but it completely affects the development of larvae and pupas. It, therefore, decreases the population of granular insects until the species is cleaned out.

M-PedeOG: Acts against insects, fungi, and mites, and is an insecticide soap. It is used as a leaf spray and is useful against pollen and destroys a large variety of insects as well. You can apply it to a wide number of vegetables. If the plants seem troubled, this insecticide may be phytotoxic and so must not be used.

Mycotrol ESO: A type of bioinsecticide that works on contact. Mycotrol is a fungus that kills an insect’s adults or larvae. It gets inside the cuticle and develops inside the insect and attacks it finally. Use it on a broad range of vegetable crops and get rid of aphids, caterpillars, grasshoppers, Colorado potato bug, and leaf- feeders.

Portal: The insecticide fights insects by disturbing their ability to produce energy. Apply it on food crops and vegetables such as melons, cucumbers, corn, and fruit vegetables. It is not very poisonous to bees and mammals, but it is very poisonous to the animals that live in the water.

Pylon Miticide: Pylon insecticide also stops the insects from producing energy. The leaf spray is good at killing mites, caterpillars, and thrips in a greenhouse and effective on peppers, onions, and eggplants.

Equiem: An herbicide that aims to remove thrips, leafminers, and whiteflies. It is derived from chenopodium ambrosioides, an herb that has very little toxicity and fights mites. As a leaf spray, it can be effective on bulb, fruiting, roots, corm greens, and brassicas.

VenerateOG: Bioinsecticide which comprises dead cells and fermented solids of Burkholderia spp. Venerate is a leaf spray so works on a broad variety of vegetable plants. Also is very effective in damaging the exoskeletons of the insects.

Ingested Insecticides
Ingested Insecticides -Ckrokill

To kill rats, mice, and cockroaches, ingested insecticides are used. Rodenticides are a type of ingested insecticides as well. This is a kind of poison that is successful in killing rats. In order to get rid of them, it is used as deadly bait and given to rats.


Herbicides are another form of pesticide used to destroy plants that are infected. In particular, it is used to kill parts of the plant on which the insects feed or parts of the plant where the infection has spread. Fungicides also belong to the same herbicide family; they are used to destroy weeds and fungi which are accountable for the damage of agricultural yields.

Advantages and Disadvantages of Insecticides

There are numerous advantages and disadvantages of insecticides, especially to farmers. Insecticides aid in controlling the insects dramatically in the short term. However, in the long run, insecticides seem to affect human health and the environment.

  • Effective and fast

 Insecticides are harmful to live pests and the action of these insecticides is immediate and successful in order to control the pest population.

  • Prevention of diseases

By killing the insects, the insecticides will prevent the diseases that affect the growth of the plants.

  • Control of insects

They help in removing and also killing the insects that live on economically important plants.

  • Increasing yields

Not only useful in decreasing the population of the insects but helpful in increasing the productivity of crops.

  • Cost-effective

Cheap, easily available and they are cost-effective.

  • Affects the quality of food

The leftover of the toxic chemicals can be present in the food crops. These chemicals might be mixed with the food and will cause severe and serious health problems in human beings and animals as well.

  • The risk of poisoning

All living organisms are harmfully affected by insecticides. Based on the application of insecticides in the agricultural sector, humans will develop symptoms of nausea, headaches, pain, and serious toxicity disorders.

  • Responsible pollutants

Pesticides are highly dangerous toxins of air, soil, and water.

  • Influences the food chain

Sometimes, another creature might take the insecticide that is in the insects’ body, and those results in biomagnifications. In which large populations of creatures are affected at higher tropic levels.

  • Loss of beneficial insects

The action of insecticides not only destroys the targeted dangerous insects but also destroys the beneficial insects that are pollinated. Therefore, the life cycle of plants is severely affected.

Related Questions

1. What are examples of insecticides?

  • Dieldrin.
  • Endosulfan.
  • Endrin.
  • DDT.
  • Heptachlor.
  • Aldrin.
  • Chlordane.
  • Chlordecone.

2. What is an insecticide used for?

Insecticides are pesticides used to monitor insects for destroying or keeping them from engaging in unpleasant or damaging activities. They are categorized based on their structure and mode of operation.

3. How do insecticides kill insects?

Systemic insecticides kill insects when the plant is consumed and the chemical insecticide is absorbed. Organochlorine compounds operate on insects by opening what is recognized as the sodium ion channel in the neurons or nerve cells of insects, allowing them to fire instantly. The bug will go into spasms and die soon.

4. What is a natural insecticide?

Neem oil is one of the powerful organic insecticides for all purposes, destroying everything from cabbage worms and squash bugs to nematodes and grubs under the soil. Neem oil is a deadly neem tree extract, a tropical Asian plant commonly spread in gardens.

5. Is insecticide harmful to humans?

Pesticides are poisonous, and they will, sadly, affect more than just the pests they are attacking. They are poisonous, and a variety of health effects can be caused by pesticide exposure. They are concerned with a number of severe diseases and illnesses, from respiratory disorders to cancer.

6. Why do we need insecticides?

People prefer to use insecticides in order to fight different insects and disease carriers, such as mosquitoes, ticks rats, and mice, and useful in controlling weeds, infestations, and diseases in agriculture. Herbicides are there to disable or stop the development of unwanted plants.

Pesticides vs. Insecticides | Pest Control 

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