Monterey® Horticultural Oil - 16oz (1pt) - OMRI Listed®

Monterey® Horticultural Oil 16oz (1pt) — OMRI Listed® | Refined Mineral Oil | Aphids, Mites, Scales & Whiteflies

Monterey Horticultural Oil is a highly refined mineral oil insecticide that controls soft-bodied insects and mites by coating and suffocating them — blocking the spiracles (breathing pores) that insects use for respiration. The highly refined formulation is odorless, non-irritating, and specifically designed to be safe on plant tissue — it will not burn or brown treated plants when used as directed. OMRI Listed for organic production and labeled for use on ornamentals, roses, vegetables, citrus, fruit trees, and nuts.

Key Features & Benefits

• Highly Refined Mineral Oil — Will Not Burn Plants: The high degree of refinement removes the phytotoxic compounds present in less refined oil products — delivering effective pest control without leaf burn or browning on treated plant tissue when used at label rates.
• Suffocation Mode of Action: Mineral oil coats insects and mite eggs, blocking respiratory pores and causing suffocation — effective against all life stages including eggs, nymphs, and adults without the resistance risk of receptor-based chemistry.
• Odorless & Non-Irritating: No strong odor or irritating fumes — practical for use in enclosed greenhouse and interiorscape environments.
• Controls Aphids, Mites, Scales & Whiteflies: Effective against a broad range of soft-bodied insects and mite species common on ornamentals, fruits, and vegetables.
• Dormant & Growing Season Use: Apply as a dormant spray on deciduous trees and shrubs to smother overwintering insect eggs and scales, or during the growing season at lower rates for active pest control.
• OMRI Listed® for Organic Use: Certified for organic production.
• 16oz (1pt) — Concentrate.

Who Should Use This

Home gardeners, greenhouse growers, nursery operators, and organic orchardists managing soft-bodied insects, mites, and scale infestations on fruits, vegetables, ornamentals, and citrus. Horticultural oil is an essential IPM tool for its resistance-independent mode of action and dormant spray utility for overwintering pest management.

Frequently Asked Questions

Can I use Monterey Horticultural Oil on vegetables?

Yes. Monterey Horticultural Oil is labeled for use on vegetables as well as ornamentals, roses, citrus, fruit trees, and nuts. See the product label for specific rates and any crop-specific restrictions.

What is the difference between dormant and growing season application rates?

Dormant sprays are applied at higher concentrations to trees and shrubs before bud break to smother overwintering eggs and scale insects. Growing season applications use lower rates to avoid potential phytotoxicity on actively growing, sensitive foliage. See the product label for specific rates by season and crop type.

Is horticultural oil safe to use in a greenhouse?

Yes. Monterey Horticultural Oil is odorless and non-irritating — suitable for enclosed greenhouse and interiorscape environments. Ensure adequate ventilation and follow label rate guidance to avoid phytotoxicity on sensitive crops.