Pesticide refers to any chemical or substance that is used to repel, control, or eliminate pests. They are different forms of pesticides. It often refers to agrochemicals. The following are some forms of pesticide products:

  • Insecticides
  • Herbicides
  • Fungicides
  • Rodenticides
Forms of pesticides
Tractor spraying pesticides on the field with sprayer



Insecticides play a critical role in keeping crops and agricultural goods safe. Since various insects, such as locusts, beetles, and aphids, do significant harm to plants if left unchecked. Almost all pesticides have the potential to have a significant influence on ecosystems; many are toxic to humans and/or animals, and some concentrate as they rise up the food chain. Insecticides are available in a number of forms, such as wettable powders, soluble concentrates, suspendable concentrates, emulsifiable concentrates, wettable dry granules, and soluble powders.

Some of the types of insecticides are as follows

  • Systemic – The insecticide travels to the outside portions of the plant after entering the roots, such as leaves, fruits, twigs, and branches.
  • Mode of action– The manner of action of physical poisons, nerve poisons, respiratory poisons, protoplasmic poisons, general poisons, and chitin inhibitors is classified.
  • Specificity– These are ovicides, pupicides, larvicides, and adulticides based on the stage of specificity.


Herbicides are to eliminate weeds and invasive species in agricultural areas.WEEDKILLERS are also known as herbicides. In addition, it suffocates crop growth by absorbing all minerals, water, and nutrients available to the plant. The amino acid and protein synthesis of herbs and weeds are interrupted, and they are finally killed. Herbicides are most typically employed in row-crop farming to maximize crop output by eliminating other vegetation before or during planting, agroforestry to prepare logged areas for replanting, and harvesting crops in the fall.

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Some of the types of herbicides are as follows:

  • Selective herbicides – Selective herbicides destroy certain weed species while leaving the desired crop mostly unharmed when applied at a precise application rate.
  • Nonselective herbicides – Non-selective herbicides, knockdown herbicides, and general weed killers are examples of commercial products.
  • Non-residual herbicides – In the soil, they quickly deactivate and absorbed by roots.


Mildews, blights, rusts, molds, and other fungi, as well as their spores, are all killed by fungicides. Plant health depends on the prevention of dangerous fungi. Fungi is a serious concern that has a negative influence on crops. They not only cause immediate damage to the entire batch, but they also have a long-term effect on the field. It’s a type of fungicide that kills or suppresses the fungus that causes the problem, preventing fungal illnesses in animals and crop damage. Fungistat is a term for a class of drugs that do not kill fungal diseases but temporarily limit fungus growth.

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Some of the types of fungicides are as follows:

  • Systemic fungicides-Systemic fungicides disperse themselves throughout the plant’s vessels by transferring themselves from the top region of the plant sprayed by the spray to the lower portion of the plant without being sprayed.
  • Protectant fungicides-Protectant fungicides are preventative in nature and are only effective if used prior to the onset of fungal infection, as the name implies. Zineb and Sulphur are two examples.
  • Contact fungicide-Contact fungicides do not penetrate all plant tissues.


Rodents may wreak havoc on crops, spread diseases, and harm the environment. When it comes to rodents, the term can refer to squirrels, woodchucks, beavers, and other animals. Rodents include squirrels, woodchucks, chipmunks, porcupines, nutria, and beavers, in addition to rats and mice. Although mice play a crucial part in nature, they can often be difficult to manage. They can harm crops, break housing laws, spread disease, and, in some situations, harm the environment. Because rodents, people, dogs, and cats are all mammals, our bodies function similarly. When consumed by any mammal, rodenticides have the same effect. They have the potential to harm birds as well. Fish oil, molasses, or peanut butter are examples of flavorings. Accidents are significantly more difficult to happen with tamper-resistant bait stations.

Some of types of rodenticides are as follows:

  • Acute poisons– Acute poisons are single-dose, fast-acting toxicants that elicit symptoms in rats extremely quickly, as their name suggests.While these characteristics make them highly effective exterminators, rodents’ behaviour is such that when they encounter fresh food for the first time, they will taste it and not eat a large amount for hours, if not days.Because rodents are neophobic, they can develop acute poison bait avoidance quickly, jeopardising a vital component of a rodent control plan on the farm.Acute poisons AVPMA-registered rodenticides includes cholecalciferol also known as Vitamin D3 or activated 7-dehydricholesterol and zinc phosphide
  • First-generation anticoagulant rodenticides– In rodents, anticoagulant rodenticides (ARs), developed for treating blood clots, can prevent their phobia.Earliest-generation ARs are the first commercial examples of these chemicals.AVPMA-registered first-generation anticoagulant rodenticides includes Coumatetralyl ,Diphacinone and Warfarin.
  • Second-generation anticoagulant rodenticides-The creation of anticoagulant rodenticides of the second generation, which have a substantially higher potency and longer half-lives in animal tissue.SGARs suppress previously resistant ,strains while retaining the delayed onset of symptoms needed to minimise bait avoidance. These chemicals, however, pose a higher risk of secondary poisoning due to their greater potency and stability in the tissues of baited rodents.The livestock and food-production industries, in particular, must exercise extreme caution to avoid contamination of production areas by SGAR bait and SGAR-baited rats.AVPMA-registered second-generation anticoagulant rodenticides includes Brodifacoum ,Bromadiolone ,Difenacoum ,Difethialone and Flocoumafen.

Less well-known pesticides includes the following:

  • Plant Growth Regulators-PGRs are a type of chemical. Chemical nutrients are essential for plant growth, metabolism, and external food supply.Their absence causes stunted development, leaf discoloration, and the loss of fruiting bodies, all of which result in lower crop yields.
  • Disinfectants-Disinfectants are chemicals that are used to kill germs, bacteria, viruses, and other pathogens.These are just a few of the many pesticides that are regularly used to boost agricultural productivity and maintain healthy plant growth.
  • Defoliants-Defoliants induce a plant’s leaves or foliage to fall off, usually to make harvesting easier.
  • Attractants-Attractants attract pests to a trap or bait, such as an insect or a rodent into a trap.
  • Disinfectants and Sanitizers – On inanimate items, disinfectants and sanitizers kill or inactivate disease-producing germs.

Direction of using pesticides safely

  • Before using a pesticide, read the label carefully.Take an expert’s advice on safe and appropriate use if necessary.
  • Always follow the manufacturer’s instructions and standards when it comes to pesticide storage and disposal.
  • Make sure you read, understand, and follow all of the label requirements when combining and spraying herbicides.
  • Double-check that the product’s label clearly states that it can be used in the way you want.
  • Pesticides vary in their ability to kill specific types of plants.
  • Some are likely to penetrate soils and move into groundwater, some likely to penetrate soils and move into groundwater, some likely to penetrate soils and move into groundwater.

Factors influencing the loss of crops

Plants have faced abiotic and biotic stresses. Abiotic stresses (physical forces) include water scarcity or excess during growth seasons, unpredictable temperatures, drought, high salinity, lack of sufficient nutrients, mineral deficiency, pollutants, and so on; biotic stresses (biological organisms) include insect pests, fungus, bacteria, virus, and weeds, among others.

Need for pesticides

Pesticides used correctly and appropriately can assist the soil to collect necessary nutrients, allowing it to grow more crops. They can assist a farmer in growing specific crops and plants while limiting the spread of hazardous pests, weeds, and insects, allowing him to meet his production goals. Simply said, agrochemicals can help a farmer achieve higher yields and meet the ever-increasing need for food. Without pesticides, hazardous organisms would continue to flourish, wreaking havoc on the quality and quantity of produce.

Insects, for example, can have two negative effects on agricultural yield. They can cause direct damage to plants in the first situation by harming roots, digging into plant tissues, devouring leaves, deforming plants and stems, and so on. While insects may not cause direct damage to plants in the second scenario, they can still cause damage by transferring viral, fungal, or bacterial infection into a crop. They can also be a nuisance to household animals and humans, as well as carry diseases. Pests and insects are still a major hazard to agriculture, as they evolve and adapt to changing ecosystems by nature. That is why it is critical to keep an eye out for them, monitor their growth, and expel them as soon as possible before they cause severe long-term damage.

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