Paraffin oil

Paraffin oil (CAS 64742-65-0) is a highly refined mineral oil used extensively as a contact insecticide and acaricide in professional agriculture. It serves as a sustainable tool for managing pest populations, particularly those that overwinter on trees and shrubs, by providing a physical rather than a systemic chemical mode of action.

The primary mode of action is the suffocation of pests and the disruption of egg development. When the oil is applied as an emulsion, it creates a thin film over the plant surfaces. This film covers the insects and mites, blocking their spiracles (breathing pores), which leads to death by asphyxiation. Additionally, the oil prevents the successful hatching of eggs by interfering with their respiratory and development processes.

Paraffin oil is commonly used on a variety of fruit-bearing plants, including citrus, deciduous fruit trees, vines, and ornamental crops. It is particularly effective against target pests like scale insects, aphids, mealybugs, and spider mites. Its use is most common during dormant seasons to clear heavy pest infestations before the growing season commences.

Application techniques require thorough coverage of the plant's surface, as the effect is purely contact-based. Growers should ensure that the oil emulsion is properly mixed to avoid uneven application. It is crucial to monitor weather conditions; applications should be avoided during extreme cold or high heat, as these conditions can either destabilize the emulsion or cause phytotoxicity to the leaves and bark.

• Provides excellent control of overwintering pest stages.
• Minimal risk of developing pesticide resistance.
• Low toxicity profile compared to traditional synthetic chemicals.
• Can be integrated into organic or sustainable farming practices.

Safety measures dictate that workers must use appropriate protective equipment, including gloves and face shields, during handling and application. Paraffin oil should be stored in a cool, well-ventilated area, protected from direct sunlight and ignition sources. Users should consult label restrictions regarding tank mixes, as some products like sulfur or captan are incompatible and can cause severe crop damage if combined.