Fatty acids and fish oil

Fatty acids and fish oil act as natural, contact-based plant protection products. They primarily exert their effect through physical means rather than through systemic or neurological intoxication of the target organisms.

Upon application, the substance directly contacts the pest and disrupts its protective waxy cuticle. This action forces a rapid loss of moisture, leading to the pest's death via desiccation.

In addition to dehydration, these substances can physically block the spiracles of insects, which are their respiratory openings. This causes asphyxiation and prevents the pest from breathing.

Regarding fungal pathogens, these substances act as effective disinfectants. They destroy the cell membranes of mycelium and spores, preventing the pathogen from colonizing the plant surface further.

Because the mechanism of action is primarily physical, the development of resistance in pest populations is extremely rare, making this group highly effective for rotation programs.

These products are specifically effective against soft-bodied insects and mites. Common targets include aphids, whiteflies, thrips, spider mites, and early-instar larvae of various pests.

As a fungicide, they are utilized to manage surface-dwelling diseases, most notably powdery mildew, which affects a wide variety of greenhouse and field vegetables.

The applications are versatile, covering crops such as tomatoes, cucumbers, peppers, as well as various fruit trees and ornamental garden plants.

Due to their low toxicity to mammals and the environment, they are frequently selected for use in organic farming and integrated pest management systems.

• Aphids
• Greenhouse whiteflies
• Spider mites
• Powdery mildew fungi

Application rates depend heavily on the specific formulation and the concentration of active ingredients. Typically, aqueous solutions are prepared at concentrations ranging from 1% to 3%.

Thorough coverage is essential because the active ingredients must come into direct contact with the target pest. Spraying should be done in a way that reaches the underside of the leaves.

The timing of treatment should coincide with the initial detection of pests. For heavy infestations, repeat applications are often necessary at 5–7 day intervals to manage emerging populations.

It is advised to apply these treatments during early morning or late evening to avoid high heat, which could lead to leaf phytotoxicity and rapid evaporation of the spray solution.

These substances offer short residual protection, which necessitates frequent monitoring of the field to decide when follow-up applications are required.

The requirement for direct contact is a major limitation. If pests are sheltered inside curled leaves or tight bud clusters, they will not be reached by the treatment.

High temperatures during or after application can increase the risk of plant injury. Adhering to the manufacturer's recommended concentrations is crucial to prevent phytotoxicity.

These materials may show incompatibility with other pesticides or fertilizers. A compatibility test is recommended before mixing large batches for field application.

While safer than many synthetic chemicals, these substances may still harm beneficial insects if they are sprayed directly while the insects are active on the plant surface.

Storage conditions must be strictly controlled, as oils and fatty acids are susceptible to oxidation and rancidity, which can degrade the effectiveness of the product over time.