Always follow the instructions on the insecticide label exactly. If left uncontrolled, one or two major infestations can kill your tree. Ensure that the insecticide is labeled for red maple trees and the specific type of scale insect that’s infesting your trees. Identify lecanium scale (Parthenolecanium spp.) To determine if the scale is JMS, gently rub the white wax to expose the underlying dark brown second instar shed skin. APHIDS are often blamed, and sometimes contribute to the honeydew, but by far the most copious honeydew production is by soft scale insects described below. Gloomy scale is an insect that protects its self with a small covering. Other Japanese maple pests are scale, mealybug and mites. Spray your red maples with a dormant horticultural oil in late winter or early spring, before bud break. by their brown, round bodies. They usually are difficult to dislodge. Pruning off severely infested limbs and twigs helps eliminate infestations limited to a small part of the tree. 2). By late May or early June the female scale has matured and begins to lay hundreds of eggs within a white frothy wax. Always follow the instructions on the insecticide label exactly. You’ll need to identify the exact type of scale insect that’s infesting your red maple trees in order to provide the proper treatment. Oystershell scale crawlers emerge in late May or early June, the nymphs mate in midsummer and the adult scales lay their eggs in late summer or early fall. Destroying soft scale is a relatively easy process, except for those ants. Each species has a different host range and life cycle. Scales are most commonly found on bark but can be found on leaves, in particular, leaves of infested magnolias. This condition means the female is covered dorsally by the thickened second shed exoskeleton, and this covering is opened beneath. The easiest time to identify scale insects is when they’re in the “crawler” stage, which is the only time that scales move around. The lecanium scales mate and the females lay their eggs in May and June, followed by crawlers emerging in June and July. Heavy cushion scale populations can result in the foliage of camellia, holly, rhododendron, Trachelospermum and some other evergreen plants being covered in sooty mould during the early months of the year. Armored scale insects would be a breeze to eliminate if not for their thick outer coatings. Scale insects can be black or dark brown in colour and suck fluids from Japanese maples. Although less commonly seen, gloomy scale can also infect grapes, native hollies, sweetgum, and mulberry. Good Earth Garden Market 31,772 views. The female is described as being pupillarial. They are unattractive and can damage or even kill young trees, however, so most home gardeners get rid of them. Spray your red maples with a dormant horticultural oil in late winter or early spring, before bud break. Apply the dormant oil to coat the entire tree in order to kill the over-wintering scale insects. Learn how to get rid of scale for good in this in-depth guide. Spray the plant with an insecticidal spray every four days or so. Gloomy scale attaches to the bark of the tree’s trunk and branches. Introduce natural predators to the area around the tree. The crawler stage is also the only time that scale insects are treatable with insecticides. Oystershell scale crawlers emerge in late May or early June, the nymphs mate in midsummer and the adult scales lay their eggs in late summer or early fall. Coat the foliage with the insecticidal soap after the scale crawlers have hatched, and then apply the insecticidal soap again about 10 days later. Following a recommended fertility program and watering regime will promote plant health. Spray your Japanese maple with insecticidal oil or soap. Best offers for your Garden - https://amzn.to/2InnD0w ----- How to Treat Scale on Magnolia Trees. How to Get Rid of Soft Scale. How to Get Rid of Armored Scale. Look for scale crawlers emerging in June, feeding on the branches, trunk and leaves of your red maple to identify scurfy scale (Chionaspis furfura). You can learn how to get rid of scale bugs in … Some types of soft scales include lec… Severely infested trees may have deformed and wilting leaves. 2 Prune away parts of the plant that are infested with scales. Many types of scale insects exist, grouped into two main categories: armored scales and soft scales. How to stop squirrels from chewing madly on Japanese maple Reader is worried that squirrels gnawing on the tree’s new growth will eventually leave the tree leafless Ladybugs and parasitic wasps are highly effective, natural ways to get rid of scale, according to the University of California IPM Online. Identify cottony maple scale (Pulvinaria innumerabilis), the most common scale insect species to infest maple trees, by their adult female scales with cotton-like egg sacks on their hind ends. The good news is that we have methods to control the problem, no matter what insect is to blame. The eggs hatch into pale yellow-green crawlers in late June or July and migrat… Introduce natural predators to the area around the tree. Attractive in any landscape, they are especially suitable for small gardens and can be grown in containers. The eggs beneath the waxy covering of the female are white with a purple hue. This type of scale insect is known as an armored scale because the insects protect themselves underneath an armored cover that is usually white in color. Neem and horticultural oil are two fungicides that can help control the powdery mildew attacking the Japanese maple. All Rights Reserved. Apply the dormant oil to coat the entire tree in … Apply the appropriate insecticide to your red maple trees based on the specific species of scale insect's crawler time period. Shaped like rounded bumps 4. © Copyright 2020 Hearst Communications, Inc. Minor infestations of scale on small trees may be knocked off the tree with a strong stream of water, eliminating the need for chemicals. The crawler (first instar nymph) stage of this scale insect is whit… While these Japanese maple pests can attack a tree of any age, they are usually found in young trees. Scales tend to thrive on stressed plants. Study your red maple trees’ branches and trunks to find purplish-gray scale insects that resemble tiny oyster shells to spot the oystershell scale (Lepidosaphes ulmi). . During the active growing season of your Japanese maple -- late spring and summer -- check the leaves regularly for signs of aphid infestation. Fortunately, these sap-sucking insects rarely cause serious damage to established, healthy plants. Wear gloves and eye protection when you’re handling or applying chemicals to your red maple trees. For cottony maple scale, apply the insecticide in late June or early July; apply the insecticide in June for scurfy scales; in late May or early June for oystershell scales; or in June and July for lecanium scales. I have a large Japanese maple that has been completely de-leafed by bag worms. Cushion scale. Produce a sugary liquid called honeydew 2. Japanese maple scale (JMS) is a small, oystershell-shaped, armored scale (Figure 1). Apply the appropriate insecticide to your red maple trees based on the specific species of scale insect’s crawler time period. Inspect your red maple trees to determine what kind of scale insects you have by shaking the red maple tree’s branches over a sheet of paper and looking for scale insects. They are easy to spot on the stems of trees with dark bark. Gloomy scale occurs on the soft maples like silver and red maple. They feed by sucking sap and some can weaken host plants, many excrete a sticky substance (honeydew), which allows the growth of sooty moulds. If practical, improve plant sites to reduce stress and promote growth. Spray your red maple trees with an approved insecticide, such as carbaryl, acephate, chlorpyrifos or malathion, only when the scale insects are in the crawler stage. There are two main groups of tree scale—soft and armored (hard). SCALE INSECTS are the usual cause of sweet, sticky drippage (honey-dew) from trees that collects on surfaces below. Japanese maples (Acer palmatum) are desirable for their delicate, colorful leaves and compact size. Scurfy scale nymphs mate in August and lay over-wintering eggs. Learn which plants thrive in your Hardiness Zone with our new interactive map! For small Gardens and can be black or dark brown in colour and suck fluids from maples! 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