It is designed to teach about the lifecycle and habits of the cottony cushion scale and the predatory vedalia beetle. They can also be found in the garden at the end of spring, during summer, and in the fall. After their three weeks of feeding, the nymphs settle down to spin the cottony mass that shelters them from predators. Non-pesticide control. The young crawler stage is also the easiest stage to control. Euonymus scale, on the other hand, attacks euonymus and resembles tea scale. Scale insects are closely related to aphids but most don’t look like insects at all, appearing legless and … Cottony Cushion Scale and the Predatory Vedalia Beetle This course was developed for pest management professionals, pest control advisors, pesticide applicators, and growers. Where possible tolerate populations of scale insects. Cottony cushion scale, citrus fluted scale. Generally, they are divided into two categories, armored (hard) and soft scale. If a heavy The female cottony cushion scale produces up to 1000 eggs, which are carried in the fluted white cottony egg sac. Key Points. Cottony cushion scale are sap sucking insects that have protective coverings. First described in 1870 by Westwood, the cottony camellia scale, Pulvinaria floccifera (Westwood), shows up most commonly on holly in PNW nurseries and landscapes. Infestations are most easily noticed during the summer when females produce white, cottony egg sacs that resemble pieces of popcorn on a twigs. The egg sac has the appearance of a white chocolate fluted biscuit for the very small fairies that knit with the cotton. A: You have a big infestation of cottony cushion scale. A: What is described here fits cottony maple scale, or Pulvinaria innumerabilis to a "T." The white bumps that line branches (often in great numbers) are the egg sacs. There is one more cottony scale insect which I should mention. Life History. The eggs hatch in June and July. Citrus trees are simple-to-grow flowering plants and provide a lovely fragrance for a home or garden. Severely infested trees look like they are covered with a string of popcorn. If the infestation of scale is minimal, cochineal scale treatment consists simply of a spray of water. Non-pesticide control. Others attack a variety of hosts such as white wax scale occurring on gardenias and citrus; and cottony cushion scale occurring on figs, rose, magnolias, grevilleas and citrus. Mature females are pale to dark brown, convex, and about 3-6 mm long (Fig. A: It’s cottony camellia scale. The female will deposit 1,500 to 3,000 eggs before she dies. This native Australian insect was accidentally introduced into the United States in the 1860’s and within a couple of decades brought the US citrus industry to its knees. Name – Coccidae, Pseudococcidae, Diaspididae Lifespan – up to a year (dormant in winter) Size – from 1/16 th to 1/4 th inch (1-5mm). This soft scale overwinters as a second instar nymph on the bark of host twigs and branches. Efforts at controlling this pest resulted in one of the earliest and most impressive examples of classical biological control (where natural enemies are imported from the pest's native country and introduced in areas to which it has spread). If there are lots of scale in one spot, they secrete enough honeydew to cover nearby leaves with “syrup” on which black mold will grow. This treatment should leave the plant unharmed, but to make sure, test a single leaf first. Damage The honeydew encourages the growth of sooty mould, which downgrades fruit quality and, in severe infestations, causes … Photo 4. Cottony cushion scales retain their legs, eyes, and antennae for their entire life and remain mobile. The cottony maple scale is most easily recognized by the characteristic egg masses on twigs and branches. How to Treat Cochineal Scale. Look for the small insects on the undersides of the leaves, and watch for movement. You can evict mealybugs and cottony cushion scale with a stream of water. Two weeks later spray acetamiprid (Ortho Fruit … The success of any treatment can be gauged by the extent to which new growth remains free of scale insects. The cottony maple scale, Pulvinaria innumerabilis (Rathvon), is a highly modified insect pest that commonly attacks silver and red maples in Ohio. The cottony cushion scale was described by Maskell (1878) from specimens sent to him by Dr. Purchas from Auckland, New Zealand. Its favored host is maple trees, although it has been found on a number of other species as well. Immature females are flat and inconspicuous. Commonly used Chemicals: Although a commonly occurring pest, chemical treatment is rarely needed for cottony-cushion scale in Arizona. The tree may become weak if the infestation is severe and repeats for several years. Cottony camellia scale. Older instars move to the twigs, branches, or trunk to feed. The protective covering can be hard and waxy to soft and foam-like. Cottony camellia scales, Pulvinaria floccifera, are cream to tan, elongate oval, and relatively flat.They are also called cottony taxus scales as this scale is a fairly common pest of yew. Cottony cushion scales can have 2 - 3 generations per year. Danger to plant – fatal if infested The host was kangaroo acacia and the insect was named for Dr. Purchas. Note that dead scales can remain firmly attached to the plants. Nymphs of the cottony cushion scale, Icerya purchasi. Males are rare and exist in the species to allow the scale to reproduce sexually producing both females and males. You have two methods to learn how to get rid of cottony cushion scale. If you have Cottony Camellia/taxus scale, you want to treat them when the eggs have just hatched and they are in the vulnerable "crawler" stage, which could be now--although it might be a little early-- or in the next couple of weeks. The female scale is easily indentified with a long tail attached at the end holding the egg sac. There are other different types of scale and some scale insects are host specific, such as rose scale, white palm scale, gum tree scale and tea scale (camellias). Scale insect control. Control measures must be timed to coincide with hatching of the crawler stage which usually occurs in early summer for cottony scales. Quick scale insect facts. Treatment is in two parts: spray under all leaves and around all stems thoroughly with horticultural oil. Cottony cushion scale is about 5mm long, reddish brown and has a dome shaped white mealy coat. Scale insects on indoor plants can breed all year round and so there is no best time of year to treat. The cottony maple scale (Pulvinaria innumerabilis) is one of the largest and most conspicuous scale insects in this country. One of the best-known in this family is Coccus viridis, also known as coffee scale or green scale. Scientific Name. Treatment for Scale on a Citrus Tree. Color photographs for 200 scale species and detailed discussion of these and others are available in the California Department of Food and Agriculture publications by Gill listed in References. Cottony scale insects produce a cottony egg mass from which the mobile crawler stage hatches. Cottony cushion scale, European elm scale, soft scales, and certain other scales secrete sticky honeydew. Photo 5. Others attack a variety of hosts such as white wax scale occurring on gardenias and citrus; and cottony cushion scale occurring on figs, rose, magnolias, grevilleas and citrus. Crawler or first nymph stage, of the cottony cushion scale, Icerya purchasi. These soft scales are usually first noticed during the summer months when the female produces a conspicuous white egg sac, called an ovisac, that appears as a ¼- to ½-inch long ball of cotton. Cottony Maple Scale Characteristics.