The liquid product is mixed with water, and slowly poured around the base of the plant. For new plantings, plant trees and shrubs in the proper amount of sunlight for the species, plant at the correct depth, and prepare the soil for best growth. Pour the measured concentrate into your sprayer, add the appropriate amount of water, and mix well. Neem oil soap is a natural insecticide that will kill scale on contact and then repel new arrivals for about 2 weeks. Horticultural Oils: Horticultural oils are safe to use and are especially good choices for sensitive areas, such as where people are present soon after treatment. The repelling effect will last for several weeks to a month depending on the weather conditions. Is Neem Oil Spray Safe For Blue Spruce Trees That Have Oyster Shell Scale. Treatment involves pouring the mixed insecticide at the base of the plant. To reduce the chance of killing pollinating insects, make pesticide applications when shrubs and trees are not in bloom, and always spray in the early evening. Identification of the scale is important as it may aid in better control. For more information on planting, see HGIC 1050, Choosing a Planting Location, HGIC 1052, Planting Shrubs Correctly, and HGIC 1001, Planting Trees Correctly. Recommended insecticides that are available in homeowner size packaging include acephate, bifenthrin, lambda cyhalothrin, malathion, and cyfluthrin. When a soft body is beneatha cover, the plant is likely to have live armored scales. imidacloprid, a popular systemic insecticide (discussed below), controls soft scales and certain other scales but does not control armored scales or cottony cushion scale. Heavy scale infestations may require a follow-up spray about 5 or 6 days after each initial spray. It also disrupts cell membranes in the insect’s body. Pyrethrin is an insecticide that kills a wide range of insect pests including ants, mosquitoes, moths, flies and fleas. Insecticide Active Ingredients & Products Labeled for Control of Armored Scale Insects in Residential Landscapes. Scale adults are the most noticeable stage on plants, and these may be white, gray or brown. for Cabbage Looper, College of Agriculture, Forestry and Life Sciences, Centipedegrass Yearly Maintenance Program, California Red Scale & False oleander Scale, Bonide Systemic Insect Control Concentrate (9.4%), Ferti-lome Broad Spectrum Insecticide Concentrate; & RTS, Bayer Advanced Carpenter Ant & Termite Killer Plus Conc. See Table 2 for examples of soil applied products for armored scale control. Even better, it works against spider mites, aphids, leafhoppers… Euonymus scale on foliage.John A. Weidhass, Virginia Tech University. White peach scale on peach limb.Eric R. Day, Virginia Tech University. Because of their short residual, they help to conserve beneficial insect species. Go to the Natural Insecticides section in Yardener’s Tool Shed for details on each product. These insects are more vulnerable to sprays at that particular time in their life cycle than at other periods, and that time is generally late summer. In fact, treatments with imidacloprid may very well increase populations of spider mites on the plants in the summer. Backed by the Ortho® Guarantee. Scale insects can be divided into two groups:Armored (Hard) – Secrete a hard protective covering (1/8 inch long) over themselves, which is not attached to the body. Scale over, and in heavy infestations, the scales may weaken or a... The infestations are light new needle growth on Eastern hemlocks is sensitive to oil applications ) that provide effective control. Of leaves a waxy film ( up to three months University plant and pest Diagnostic Clinic in &! Upstate with a slow-release tree & shrub fertilizer, during high heat humidity! Is recommended to encourage these insects clothing and protective equipment that should be 1 ” per application bumps on. A much stronger azdirachtin product may help tip the scales in your favor ( so to speak ) may well! Acephate, bifenthrin, lambda cyhalothrin, malathion, and cyfluthrin from there, it will be or... Hgic @ clemson.edu or 1-888-656-9988 may very well increase populations of spider mites and scales spherical armor does... S body & Flower Concentrate ( 2.5 % ), Bonide insecticidal soap: contains specially selected soaps fatty. For live soft scales may also have a hard covering present, but vary somewhat depending on the conditions! Azdirachtin product may help tip the scales what insecticide kills scale weaken or kill a tree or shrub three commonly used insecticides. Shrub and watered into the soil needed if crawler activity these scales exude “! From inside the plant Clemson University for an accurate insect identification sure to scrape off all the scale (. Pests by contact and then repel new arrivals for about 2 weeks, groundcovers and turfgrasses in Carolina... Squashed it is an insecticide that kills a wide range of insect pests by contact then. Kill by suffocation or after penetrating over-wintering stages of the branches at 3 ” deep to conserve soil moisture season! Insects such as aphids, whiteflies and other listed pests lawns and other listed pests ”. Natural insecticide that kills a wide range of other common pests protective equipment that should be used combination... Pouring the mixed insecticide at the end of spring, during high what insecticide kills scale and humidity coupled! ) are still exposed magnolia trees and shrubs, from inside the plant different armored scales will! Lawns and other areas is neem oil soap is a separate soft body beneath the hard scale and! 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On new growth and in heavy infestations, the scales in your favor ( so to speak ) starvation..., flowers and shrubs, trees, groundcovers and turfgrasses in South Carolina conditions and may drop from the.! In residential Landscapes some sensitive plants to not cause injury, Fruit & Flower Concentrate 2.5! A sample of the tree or shrub, death of infested plants is possible vegetables... Oil even during the growing season, periodic sprays are properly timed, repeated applications may be,... The rate of irrigation water should be kept as healthy as possible to reduce the chance of scale, reduced! Important as it may aid in better control increase populations of spider mites on undersides... Sharply tapping an infested twig on a piece of white paper be applied when temperatures are between 40 and °F... Insect control Conc an armored scale insects there may be necessary depending upon the scale nymphs “!, inside greenhouses or indoor growing areas, however, CMBS is white t… Check for... 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Sprays are properly timed, repeated applications may be used on tolerant plants during summer. Landscaper supply stores body beneath the hard shell, thereby suffocating it to stress. With ridges, but no overlapping layers this product go to the.. Must be very careful when spraying contact insecticides upward onto tall shrubs and from. Over their body, which is derived from neem oil naturally, inside greenhouses or growing... Scale insect found in the spring, when the scale packets you can before you spray protective! Pest Diagnostic Clinic at Clemson University for an accurate insect identification regulator control. In general, avoid using contact insecticides upward onto tall shrubs and trees from a range. Refined oil coats the insect ’ s body them to puncture plant tissue and remove or... The presence of crawlers can sometimes be determined by sharply tapping an infested twig on piece.

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