7 Types of Pesticides for Different Target Organisms: Has Their Effectiveness Been Proven?

Pesticides are used to control organisms that can reduce crop yields, damage products, or interfere with the surrounding environment. However, not every pesticides works against the same target.

Active ingredients, formulation, concentration, and mode of action all influence which organisms a product can control. For this reason, the presence of an active ingredient alone does not prove that a finished product is effective.

Efficacy testing is required to determine whether a pesticides delivers the level of control claimed against its intended target organism.

Table of Content:

• Insecticides
• Fungicides
• Herbicides
• Rodenticides
• Nematicides
• Acaricides
• Molluscicides
• Why Is Pesticide Efficacy Testing Important?
• Different Pesticides Require Different Test Methods

Insecticides

Insecticides are designed to control insect pests in agriculture and other environments. Common targets may include caterpillars, aphids, planthoppers, beetles, flies, mosquitoes, and cockroaches.

Different insecticides may act through direct contact, ingestion, nervous-system disruption, or interference with insect growth. Because insect species vary in their susceptibility, effectiveness against one species cannot automatically be assumed for another. Efficacy testing should therefore use the appropriate target organism.

Read Also:
6 Strategies of Environmentally Friendly Botanical Pesticide Testing

Fungicides

Fungicides are used to manage plant diseases caused by fungi and related organisms. They may inhibit spore germination, mycelial growth, or disease development on plants.

Their performance can be influenced by pathogen species, active-ingredient concentration, application timing, environmental conditions, and product formulation. Testing is therefore important to demonstrate that the formulation can suppress the intended pathogen under relevant conditions.

Herbicides

Herbicides control unwanted plants or weeds that compete with crops for water, nutrients, light, and space. Some herbicides are selective, while others are non-selective. They may also be designed for pre-emergence or post-emergence application.

Relevant efficacy parameters may include weed mortality, growth inhibition, biomass reduction, symptom development, and possible injury to non-target plants.

Rodenticides

Rodenticides are pesticides designed to control rodents, particularly rats and mice. Product performance is not determined by active-ingredient toxicity alone.

Bait palatability can also have a major influence on efficacy. Testing may evaluate bait consumption, acceptance, mortality, time to effect, and performance against the intended rodent species.

Nematicides

Plant-parasitic nematodes can damage roots and interfere with water and nutrient uptake, resulting in poor plant growth and reduced yields. Nematicide testing may assess nematode mortality, movement, egg hatching, population development, and root damage.

These evaluations help demonstrate whether the product and application rate provide adequate control.

Acaricides

Acaricides are used to control mites that may attack crops or cause problems in other environments. Because mites differ biologically from insects, a conventional insecticide may not necessarily provide the same level of control.

Testing can assess activity against eggs, larvae, nymphs, or adults depending on the intended claim.

Molluscicides

Molluscicides target mollusks such as snails and slugs that can damage leaves, seedlings, stems, and other plant tissues. In addition to the active ingredient, bait formulation and attractiveness may influence performance.

Testing may evaluate consumption, mortality, behavioral changes, crop damage after treatment, and the time required for the product to take effect.

Why Is Pesticides Efficacy Testing Important?

Two products containing the same active ingredient may not perform identically. Differences in concentration, particle size, formulation, additives, stability, and application methods can affect their overall performance.

Efficacy testing helps manufacturers determine:

• Whether the product works against the intended organism
• The effective concentration or dose
• Speed of action
• Duration of protection
• Performance consistency
• Potential effects on non-target organisms
• Whether the proposed claim is supported by data

It can also be used to compare formulations during product development.

Different Pesticides Require Different Test Methods

There is no single test method suitable for every pesticide. Insecticides may require insect bioassays. Fungicides must be evaluated against specific pathogens.

Rodenticides may require palatability and mortality studies, while herbicides require assessment of weed control and potential phytotoxicity. A suitable testing plan should therefore consider the active ingredient, formulation, target organism, application method, dose, observation period, and intended product claim.

Prove Your Pesticide Performance with the Right Efficacy Test

An active ingredient alone is not enough to prove that a pesticides performs as claimed. Support the performance of insecticides, fungicides, herbicides, rodenticides, and other pesticides products with appropriate efficacy testing.

Discuss your pesticides efficacy testing requirements with IML Testing & Research and obtain a testing approach designed around your product and target claim.

Author & Editor: Lina

References

Food and Agriculture Organization of the United Nations. (2006). Guidelines on Efficacy Evaluation for the Registration of Plant Protection Products. FAO. Pedoman ini dapat menjadi rujukan utama untuk pembahasan uji efikasi pestisida pertanian.

Food and Agriculture Organization of the United Nations. (2026). Efficacy Data – Minimum Effective Dose Tests. FAO Pesticide Registration Toolkit. Panduan ini membahas penentuan dosis efektif minimum, konsistensi pengendalian, organisme target, dan kondisi pengujian.

World Health Organization. (2009). Guidelines for Efficacy Testing of Insecticides for Indoor and Outdoor Ground-Applied Space Spray Applications. WHO/HTM/NTD/WHOPES/GCDPP/2009.6. World Health Organization.

World Health Organization. (2009). Guidelines for Efficacy Testing of Household Insecticide Products: Mosquito Coils, Vaporizer Mats, Liquid Vaporizers, Ambient Emanators and Aerosols. WHO/HTM/NTD/WHOPES/2009.3. World Health Organization.

World Health Organization. WHO Efficacy Testing Guidelines for Vector Control Products. WHO Prequalification of Vector Control Products. Pedoman WHO mencakup pengujian berbagai produk pengendalian vektor, termasuk insektisida, larvasida, repellent, dan moluskisida.

United States Environmental Protection Agency. (2026). Types of Pesticide Ingredients. U.S. EPA. Sumber ini menjelaskan klasifikasi pestisida berdasarkan organisme sasaran, termasuk insektisida, fungisida, herbisida, rodentisida, dan akarisida.

Pitt, W. C., Driscoll, L. C., & Sugihara, R. T. (2011). Efficacy of rodenticide baits for the control of three invasive rodent species in Hawaii. Archives of Environmental Contamination and Toxicology, 60, 533–542. Studi ini mengevaluasi efikasi dan palatabilitas beberapa formulasi umpan rodentisida terhadap spesies tikus target.

Nakagawa, L. E., Costa, A. R., et al. (2015). Palatability and efficacy of bromadiolone rodenticide block bait previously exposed to environmental conditions. Pest Management Science. Penelitian ini mendukung pembahasan bahwa palatabilitas umpan merupakan salah satu faktor penting dalam efektivitas rodentisida.

Hubert, J., Stejskal, V., Munzbergova, Z., et al. (2007). Toxicity and efficacy of selected pesticides and new acaricides to stored product mites (Acari: Acaridida). Experimental and Applied Acarology, 42, 283–290. Penelitian ini relevan untuk pembahasan pengujian akarisida terhadap tungau sasaran.

Vercruysse, J., Rehbein, S., Holdsworth, P. A., et al. (2006). World Association for the Advancement of Veterinary Parasitology guidelines for evaluating the efficacy of acaricides against ticks on ruminants. Veterinary Parasitology, 136, 29–43. Pedoman ini membahas desain dan interpretasi studi efikasi akarisida terhadap organisme target.

Wang, W., et al. (2022). Control of the invasive agricultural pest Pomacea canaliculata with a novel molluscicide. Studi ini mengevaluasi aktivitas moluskisida melalui pengujian laboratorium dan lapangan terhadap siput target.

World Health Organization. (2006). Pesticides and Their Application for the Control of Vectors and Pests of Public Health Importance (6th ed.). World Health Organization. Panduan ini membahas penggunaan pestisida untuk pengendalian berbagai vektor dan hama kesehatan masyarakat.