Scale insects are commonly black or gray and look like small, oval or round bumps.

The treatment should be done every two weeks while the scale insects are present but should not be done more than four times. Spray the bottom of the leaves, where spider mites feed, using a water hose with a high-pressure nozzle. They are hardy in U.S. Department of Agriculture plant hardiness zones 2 to 11, depending on the species.

Apply again in late winter or early spring during a thaw day. Insecticides commonly only exacerbate the problem by killing off the spider mite’s natural enemies. By creating an account you agree to the Hunker, North Dakota University Extension: Hortiscope -- On Juniper, Clemson University Cooperative Extension Service: Juniper Diseases & Insect Pests. Juniper scale insects will cause juniper needles to turn brown or yellow and fall from the branches, which can eventually die from the infestation.

Hunker may earn compensation through affiliate links in this story. If your juniper bush is severely overrun with spider mites, discard and destroy it to prevent spreading. How to Stop Juniper Bushes From Turning Brown, The Leaves of My Otto Luyken Laurel Are Turning Brown, Fine Gardening: Genus Juniperus (Juniper), Missouri Botanical Garden: Juniperus Horizontalis “Blue Chip”, Missouri Botanical Garden: Juniperus Virginiana, Clemson University: Clemson Cooperative Extension: Juniper Diseases & Insect Pests, Missouri Botanical Garden: Phomopsis Blight of Juniper, Missouri Botanical Garden: Pesticides: Copper, Purdue University: Purdue Extension: Disease Management Strategies: Using Organic Fungicides, Missouri Botanical Garden: Spruce Spider Mite, Missouri Botanical Garden: Scale -- Outdoors. Hold a piece of white paper under a juniper branch and shake it. Spruce spider mite infestations cause juniper needles to develop small yellow spots and some of them usually change to brown and fall from the shrub. They range in size from 6- to 9-inches to more than 50 feet tall. You can stop a juniper bush from turning brown by first identifying the cause and then eliminating the source through insecticides and proper management. Though it is known as being quite hardy, the creeping juniper can begin to brown for a variety of reasons, including improper watering, poor soil conditions and pests. Blue Star Juniper turning brown. A.J. Failure to follow the proper planting and care procedures can stunt this growth drastically, and decrease its aesthetic appeal.

Pick the bags off and burn them; they contain the damaging bagworms. How to Stop Juniper Bushes From Turning Brown.

Also called juniper twig blight or phomopsis, this serious fungal disease kills juniper branches and sometimes the whole bush. When the blight is persistent and recurring, a copper-based fungicide can be used to prevent the disease. Prune out the orange galls using sharp bypass pruners.

She recently became a licensed insurance agent but has decided to pursue a writing career instead.

Asked July 9, 2019, 12:54 PM EDT. Spray the juniper every 10 days until the caterpillars are eradicated.

She has interviewed and reviewed many national recording acts, among them Everclear, Live, and Alice Cooper, and received her Master of Fine Arts degree in writing from Warren Wilson College. To prevent infection, do not plant junipers in heavy clay soil or soil that does not drain quickly. Coat the foliage and branches with the fungicide three to four times with 10 to 14 days between treatments. ), a type of coniferous evergreen plant, has attractive needle-like foliage that ranges in color from lovely silver-blue to deep, intense green. Avoid planting new landscape plants that are susceptible to the disease in the same space. Bagworms, spider mites, the fungal disease juniper tip blight, and even dog urine cause the branches and twigs of the bush to lose their vibrant green color. Combine 3 tablespoons of vegetable-oil based soap with 1 gallon of water and add the solution to a spray bottle. The Blue Point juniper has a moderate growth rate, with an increase of 15-20 inches per year, eventually reaching heights of up to 12 feet. With vigilance and prompt action, you may be able to stop any browning that has begun. They may excrete honeydew, which is a clear, sticky substance. Healthy junipers have distinctive evergreen foliage. Depending on the type of blight, the dieback may occur at the center of the shrub or along the length of the branches. Wrap the stem bases of junipers with guards of 1/4-inch hardware cloth to discourage mice, which gnaw the bark off and cause increased risk of infection and disease. If there are no beneficial mites present, spruce spider mite infestations can be kept under control by spraying the juniper with a strong spray from the hose once or twice each week. There may also be a fine web between the leaves or branches.

If the mites are spruce spider mites, they will be green or brown. Soggy roots and excessive moisture make these plants susceptible to fungal diseases which can cause browning of foliage. Insufficient and excessive watering as well as dog urine can cause the juniper’s needles to turn brown and drop, but two diseases and two pests can also cause these symptoms.

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