The scale bug is small, oval and flat, with a protective tan to brown shell-like covering (scale). Pests and Diseases. The female then lays her eggs under her brownish armor, dying once the last egg is laid. Cottony cushion scales, for example, are off-white but the crawlers are orange. They are 1.5 to 2.5 millimeters long. Be aware that other sucking insects, such as whitefly and aphids, also produce honeydew that can lead to sooty mold. Distinguishing Symptoms. They recommend dissolving one vitamin B1 tablet in 2 litres of water and pouring the solution over the root system. DESCRIPTION: Adults: Female fern scale armor is oystershell or pear shaped, flat, light brown with the crawler cast skin a paler brown. Two thorough treatments 2 weeks apart should give good control. Scale: Scale insect is a common problem for the Bird's nest fern. Photo by Dan Gill/LSU
Don’t use oil-based sprays on ferns or fine-leafed palms. If the insects are on the underside of the leaves and the oil is only applied to the upper surface, it will have no effect on them. They are found on leaves and fruit of citrus but not on large limbs or trunks. Oils are also effective against aphids, whiteflies, spider mites and the crawler stage of scales, yet they are less harmful than other insecticides to beneficial predatory insects. Euonymus scale, on the other hand, attacks euonymus and resembles tea scale. Let’s learn more about identifying scale and how to control them. Most gardeners never notice these crawlers. These insecticides are sprayed onto the plant or applied to its roots. For scales on deciduous plants including edible fruits, a plant oil winter wash (considered organic e.g. Scale insects are tiny creatures that hide underneath a protective covering and suck the sap out of leaves. Care should be taken as some of these insecticides are not suitable for ferns. Some experts advise spraying the tree with horticultural oil or a combination of malathion and horticultural oil once a week until the pests are gone. Because of its minute size, heart fern makes a good indoor plant, particularly in potted form. An added benefit of oil sprays is that they also help clean the unsightly sooty mold from the plant. Some fern experts swear that their ferns enjoy a tonic of vitamin B1. Follow label directions carefully. The honeydew accumulates on the foliage and can cause it to look shiny and feel sticky. Avoid overhead watering. It does have heart-shaped leaves that appear leathery and green. If you determine your tree is affected by scale, prune heavily infested fronds and dispose of them carefully. Apply an insecticidal soap or horticultural oil, following label directions. When fern scales are encountered, horticultural oils give adequate control without excessive phytotoxicity to ferns. If left untreated, Scale are fatal to African Violets. Ferns are often very sensitive to pesticides, but you can try spraying with horticultural oil or dipping a cotton swab in Isopropyl alcohol and dabbing each and every bug. After moving about for a short time, they insert their mouthparts into the plant, feeding on the sap. Avoid bringing scale crawlers into the house. Photo by Dan Gill/LSU AgCenter, Tea scale. Our preferred treatment is denatured alcohol applied with a fine brush directly to the insects on the undersides of the fronds. Oval or round brown spots indicate fern scale. Yates Nature’s Way Citrus & Ornamental Spray is a ready to use, organically certified blend of pyrethrin (an extract from the pyrethrum daisy) and vegetable oil. It’s an organic spray but, if possible, spray in the evening to avoid harming any beneficial insects in your garden. Baton Rouge, LA 70803
Smother the scales. Acephate, imidacloprid and dinotefuran are three commonly used systemic insecticides that are effective against scale. The alcohol alone should kill the scale, but the dead insects will remain on your plants and make it difficult for you to scout for new infestations. This can control the overwintering scale nymphs in December-January when the plants are fully dormant; With grape vines, peel away the loose outer bark to expose the scales before treatment You can buy neem oil concentrate for pretty cheap, and a bottle will last you a long time. Scale insects are one of the more common groups of insects that attack plants. For these plants either use pyrethrum or see the other treatment option. Combat major attacks with a suitable insecticide. When they first hatch out of their eggs, scale insects are mobile. It works very well against scale. Cottony cushion scale. From the name itself, heart fern is called as such because of the shape of its leaves. The brown individuals are the female scales and the white forms are males. Isolate infested plants as soon as scales are discovered. At this stage, they are called crawlers, and they are very tiny. 225-578-4161
Common Problems. Once they settle down to feed and pierce the plant’s tissue with their needle-like mouthparts, they never move again and become firmly attached to a leaf or stem. Treatment: It the attack is mild remove the insects with a cotton swab dipped in diluted methylated spirits. Isolate infested plants as soon as scales are discovered. The young, called crawlers, are small (about 1/10 inch) and soft bodied and move about on the plant and onto other plants. Spray plants thoroughly (until they start dripping) with Bugtrol. about Ortho® Flower, Fruit & Vegetable Insect Killer Concentrate, Common Outdoor Bugs and How to Deal with Them, Controlling Pests on Flowers, Roses & Ornamental Plants, Ortho® Flower, Fruit & Vegetable Insect Killer Concentrate. Ferns are notoriously sensitive to pesticides. Scale insects may be resistant to some pesticides (read the pesticide label to be sure), but they can’t live if they can’t breathe. 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