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Monterey Horticultural Oil - Questions & Answers

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Monterey Horticultural Oil
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Displaying 21 to 36 (of 36 questions)
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  • Asked by Jeff from Indian Land, Sc
    04/05/2024
    Q
    When to spray with Monterey Horticultural Oil on maple tree?
    Should you spray the maple tree for gloomy scale when new leaves are beginning to flush in early spring?
    A
    Monterey Horticultural Oil is applied as needed when pests are present.  Applications should begin at the first sign of infestation.

    To determine the best time to apply Monterey Horticultural Oil in your area, we would advise speaking to a master gardener through your local extension office 
     

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  • Asked by Bill from Buellton, Ca
    04/27/2023
    Q
    Can horticultural oil be mixed with neem to spray roses?
    A

    We would not recommend tank mixing Monterey Horticultural Oil and Neem Oil together in the same tank mix. 

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  • Asked by Robert from Lewes, De
    03/29/2023
    Q
    can I use this on pacasandra?
    my packasandra looks like it is dying off and probably has some kind of bug. Can I use the Horticulture oil on this type of plant??
    A
    Monterey Horticultural Oil is labeled for treating trees and shrubs, and pachysandra is technically considered to be a type of evergreen boxwood shrub.  However, because it is not specified on the label, you may consider contacting the manufacturer directly for clarification by emailing them at [email protected]
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  • Asked by Robert from Abilene Tx
    12/31/2022
    Q
    Can i use Monterey Horticultural oil on red tips and box wood shrubs in the winter ?
    A
    We would recommend contacting your local Cooperative Extension Office for advice on the best timing in your region as per the product label, you must determine the precise timing to fit local growth and climatic conditions when applying Monterey Horticultural Oil. 
     
    The product label does state, DO NOT apply during periods of drought or when plants exhibit moisture stress. 
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  • Asked by Terry from San Luis Obispo Ca
    02/16/2022
    Q
    Can I used both Monterey Horticultural Oil and Liqui-Cop for seasonal leaf curl on my peach tree?
    How do I combine them. Do I treat separately or mix together. My concern is that Liqui Cop is undiluted and the Oil is 3 table spoons to a gallon. HELP!
    A

    Monterey Horticultural Oil is not labeled for leaf curl therefore would not be able to advise on a mix rate for treatment.

    Monterey Liqui-Cop is labeled for leaf curl on peaches at the rate of 4 - 6 tsp per gallon of water. Per the product label -  Apply as a dormant or delayed dormant spray to protect buds and shoots during rainy period. Reapply up until late bud swell. Do not apply at less than 7 day intervals. Do not apply after full bloom

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  • Asked by Jayn from Roseburg Or
    11/25/2021
    Q
    How often and how many times a year can Monterey Horticultural Oil and Monterey Liqui-Cop be applied?
    I was advised to spray 3 times per year: Thanksgiving, Christmas and Valentines Day. Is this correct?
    A

    Since Monterey Horticultural Oil is a contact kill only and does not leave a residual, it can be applied as needed when target pests are active and present with no maximum number of applications. We would recommend not applying more than once per day as needed to avoid plant injury.

    Monterey Liqui-Cop does have retreatment intervals and maximum number of applications per year. Please refer to the product label for your specific treatment information. 
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  • Asked by Matan from Va
    10/29/2021
    Q
    Is Monterey Horticultural Oil safe for edibles (lemon tree) with rust and red mites?
    With the active ingredient petroleum solvent 80%, how is this safe for edibles?
    A

    Monterey Horticultural Oil is labeled for use on citrus trees. The label states, "Oils applied after October may increase cold damage to trees." 

    For specific questions regarding the formulation, active ingredients or health risks when used on edibles, we would recommend contacting the manufacturer direclty. Monterey Lawn and Garden can be reached by through their website here. 

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  • Asked by Lt70 from Saint Augustine, Florida
    10/21/2021
    Q
    Can Monterey Horticultural Oil remove sooty mold scale for my sylvester palms?
    A

    Monterey Horticultural Oil its not labeled specifically for sooty mold, but according to NC Extension article: "If one of the horticultural oils is used for control, it also has the advantage of helping to loosen sooty molds from the plant surface. This hastens the weathering away of the sooty molds."  it will help with any insects on the plant.

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  • Asked by Mary from Mooers Forks, Ny 12959
    08/29/2021
    Q
    I have a bottle of Monterey Horticultural Oil that is 10 years old with concentrate still in the bottle, what is the best way to dispose of this?
    A

    It is suggested to contact your local sanitation department for details/instructions on product disposal in your area per the product label. 

     

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    0 of 1 people found this answer helpful.
  • Asked by Terri from Tahuya, Wa
    06/28/2021
    Q
    Explain rose bush application for pests, want to use a pump spray bottle with Monterey Horticultural Oil
    A

    For a rose application, the rate of Monterey Horticultural Oil is 2.5 to 5 tablespoons per gallon of water spraying the rose until it is wet but not dripping. You will reapply as needed. Please refer to the product label for more information. 

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  • Asked by Jennifer from Virginia
    06/11/2021
    Q
    Can you spray Monterey Horticultural Oil on house plants and succulents without hurting them?
    A

    Monterey Horticultural Oil is not specifically labeled to treat succulent plants and is only labeled for outdoor plants.  Bonide Insecticidal Soap RTU would be a better option to use.

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  • Asked by Juan from Laguna Niguel
    05/18/2021
    Q
    Can Monterey Horticultural Oil be used to treat root aphids?
    A

    For root aphids, we would suggest using Monterey Horticultural Oil as a foliar spray application to the leaves and stems of the roses and using Dominon 2L as a systemic application to the root zone. Dominon 2L is should be applied at the rate of 0.2 oz per inch of trunk diameter for trees or per foot of shrub height for bushes. This is the most effective treatment for year round control of aphids. Please review our article on Aphid Control for more information on treating this pest. ?

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    0 of 1 people found this answer helpful.
  • Asked by Patrick from Ontario Oregon
    05/15/2021
    Q
    Is there a chemical I can spray on my fruit trees that I can use in my thermal fogger? Can I use Monterey Horticultural Oil?
    A

    Monterey Horticultural Oil cannot be used in a fogger.  Essentria All Purpose may be a better product for your needs. It can be used in a fogger or sprayer and it can be used around edibles. Please refer to product label to make sure it is labeled for your target pest. 


     

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  • Asked by Carrie from Inverness, Ca
    01/21/2016
    Q
    Is it normal for Monterey Horticultural Oil to be white in color?
    It had a very strong chemical odor, surprising for mineral oil. The safety precautions are extensive for an organic non-toxic product. What else is in it?
    A

    Yes, the Monterey Horticultural Oil is white. The active ingredient is 80% mineral oil, and it contains petroleum distillates. If you have any specific questions regarding the formulation, we would recommend contacting the manufacturer directly. Their phone number is 559-499-2100.

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    0 of 8 people found this answer helpful.
  • Asked by Stanislaw from Port Huron, Mi
    01/01/2021
    Q
    Can I mix Monterey Horticultural Oil with Admire Insecticide?
    A

    Bayer Admire Pro Systemic Protectant can be tank mixed with an organosilicone-based spray adjuvant for applications targeting aphids and whiteflies for better control.

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  • Asked by Ben from Walker Louisiana
    02/08/2020
    Q
    Will Monterey Horticultural Oil kill powdery mildew on citrus?
    A

    Monterey Horticultural Oil is an insectidie only, it would but used to treat fungus like powdery mildew.  Ultra-Pure Oil Horticultural Insecticide, Miticide and Fungicide would be a better option.

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    0 of 3 people found this answer helpful.
Displaying 21 to 36 (of 36 questions)