The magnolia scale spends the winter on one- to two-year-old twigs as tiny, dark-colored nymphs. Scale insects feeding on the plant's sap can cause stunted growth, yellowish discoloration of the foliage, branch dieback, or death of the plant. Magnolia scale is one of the largest scales to feed on plants in Michigan. Magnolia L. Other Scientific Names. 0000066117 00000 n At maturity, these fragile m… The magnolia scale spends the winter on one- to two-year-old twigs as tiny, dark-colored nymphs. The tiny, mobile crawlers move around until they find a suitable feeding site on which they settle down, feed and remain throughout the winter. Magnolias are some of the most iconic and beautiful trees imaginable, but to enjoy their beauty, we have to be prepared to properly treat a common ailment that tends to sneak up on them: magnolia scale. Knowing the early signs and symptoms of an infected tree will make it much easier to treat before it gets out of hand. Magnolia scales produce large quantities of honeydew (sugary excretion) that accumulate on the tree’s leaves and twigs. 0000003349 00000 n Go here to learn about scale insects that affect magnolias and how to control them. The honeydew and sooty mold can foul park benches and sidewalks under infested magnolias. 0000009171 00000 n 0000037894 00000 n 0000150583 00000 n It is most noticeable in late spring and summer when it appears as large, whitish lumps, up to ½ inch long, attached to the branches of magnolia trees. Any plants with these remains should be avoided. Under a continuous and heavy infestation, even mature trees may be killed. 0000001896 00000 n Like other scale insects, it is good at disguising itself to escape detection, but its large size – up to 0.5 inches – makes it more conspicuous. x�֌Mb��a#"�|W�PG6X�‹N�p�NMN M���ńil7��P�&�}U(�O��k�S��G� Crawlers are yellow to reddish-brown in color and have an … The females continue to expand as they feed, and by early June they have turned a brownish-purple color. 0000002403 00000 n Magnolia scale is one of the largest of the soft-scale insects that attacks trees by sucking plant fluids and sap. This scale spends the winter on small twigs as tiny, dark-colored nymphs. Its biology is unusual in that the scales reproduce in late summer and the tiny new scales overwinter on the twigs and stems (most of the soft scale insect pests of ornamentals reproduce in May or early June). Magnolia x ‘Galaxy’ and ‘Spectrum’ from U.S. National Arboretum; both have excellent trunks and superior flowers. 0000043934 00000 n The females give birth to living young, which remain under the parent scale covering for a short time. Mature females, present in July and August, are pink-orange to brown bumps, often with a white waxy powder. If you have a disability and experience difficulty accessing this content request accommodation here. CFAES Diversity  |  Nondiscrimination notice  |  Site Map. 0000037336 00000 n 0000066397 00000 n Though there are several predators and parasites known to attack this scale, they are rarely effective at suppressing populations, especially on smaller magnolias. @!AF[�&6�cڔ�yb�>ʺ ��b��95y� ں#롪�Y�MkHjL~�_p��֩�����n,�6=�Nl�Ǔ`ը��R�PJ���+Ai���GJ? There are other scale insects that feed on other trees. Its primary host is magnolia. Magnolia scale infestations attract a wide range of natural enemies such as the notorious scale nemesis; the Twice-Stabbed Lady Beetle (Chilocorus stigma), or the peculiar looking lady beetle larva known as the Mealybug Destroyer (Cryptolaemus montrouzieri). The tuliptree scale is one of the largest soft scale insects in the United States. 0000047347 00000 n By early summer, the yellowish-brown females are covered with a powdery, white waxy coating. Repeat every four weeks as necessary. As temperatures warm in the spring, the scales begin to suck sap. 0��C#K�}Ȼ]G�C���@�Un�D�6�N�9e������6�I�E[)]�㯳M���6-b>%b�_�K���X�E냃LV��J�3w��q����t��f��� ��0Q����K��d�?���%'�S�}i���L�D�M�ʤ��٠LN#��T7Ե�'�NC��N�*_V6!��ɛ�������~jS��b��|?l���������f/��������0E��{*��HS�Fd�5$� b36y��j�rs�4ޡl���#b1rT��ZU]�U�W�����FL��d� 0000439524 00000 n 0000074837 00000 n 0000074565 00000 n Middle-aged ‘Rosea Jane Platt’ Star Magnolia. When applied in early May, soil drenches with systemic insecticides have provided excellent control. Damage occurs as these insects remove plant fluid from their host. 2). ©Sarah Vanek/Bugwood.org - CC BY-NC 3.0 US: Identity Top of page Preferred Scientific Name. Magnolia Scale. Magnolia scale is the largest scale insect in Iowa. Adult females may reach nearly ½ inch in diameter when fully grown. Sprays applied before the crawlers are present or after they have become dormant in the overwintering stage will have little effect. Additionally, development of leaves may be halted, resulting in a thinning canopy. Germany: Magnolie; EPPO code. Leaf size ranges from small (2 inches long and 1 inch wide), as with star magnolia, to large (10 inches long and 4 inches wide), as with Southern magnolia. ‘Little Gem’ Southern Magnolia1 Edward F. Gilman and Dennis G. Watson2 INTRODUCTION This cultivar of Southern Magnolia has a compact, upright growth habit more typical of a multistemmed shrub than a single-trunked tree (Fig. Magnolia scale can also cause slow growthand, on trees that are heavily infested, substantial weakening of branches, branch dieback, and eventual tree death . Magnolia scale can be satisfactorily controlled with a variety of insecticides if applied when the insects are in the freshly settled crawler stage. 0000104739 00000 n 0000113244 00000 n This wax is lost at the time that the crawlers emerge. The Plants Database includes the following 16 species of Magnolia . Other species of magnolias such as cucumbertree and southern species are occasionally attacked but are rarely damaged as a result. Most of the magnolia scale infestations are already present on the tree, so careful inspection of the branches is imperative upon purchase. We work with families and children, farmers and businessowners, community leaders and elected officials to build better lives, better businesses and better communities to make Ohio great. 0000090810 00000 n 0000038328 00000 n 0000037186 00000 n Males emerge about the same time as small fly-like insects which mate with females and then die. Life Cycle: Magnolia scale has one generation per year and overwinters as on one and two nymphs year old branches. Especially in a case where your magnolia tree is near a deck, or some sort of gathering place on your property – it’s important to get the tree treated. Magnoliaceae – Magnolia family Genus: Magnolia L. – magnolia Subordinate Taxa. 0000090393 00000 n 0000038662 00000 n Nymphs mature in early June, whenadult females begin to lay eggs that hatch in late August. 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