The fungus usually enters through wounds, although a weakened tree is often invaded directly. The mimosa webworm (Homadaula anisocentra) is an occasional pest of honeylocust trees in Iowa. Damage is done by webworm caterpillars, which web foliage together and skeletonize leaflets. There are two generations of caterpillars per year. are deciduous and semievergreen trees. Albizia, Mimosa, Silk tree—Albizia spp. Trees have dark green or yellowish-green fernlike leaves and produce puffy pink, green, or yellow flowers. Albizia spp. For webworms, spider mites, cottony cushion scale, it is possible to control them through natural means such as introducing beetles to an area of infestation, as they are natural predators of these pests. Extensive damage is most obvious following the second generation in August. Affected foliage gradually turns brown. Mimosa wilt is caused by the fungus Fusarium oxysporum f. sp. Caterpillars feed on the foliage and tie the leaflets together in tightly compressed, protective webs. Near construction areas, tree roots suffering from soil compaction often become infected. perniciosum, a soil-borne fungus that invades trees through the root system. While mimosa trees have a variety of pests that can cause damage to the tree the pests can be controlled. Widespread use of thornless honeylocusts as ornamentals has heightened interest in the control of this insect, because all varieties of the tree are susceptible to attack. Mimosa webworms attack both mimosa and honeylocust trees in Indiana. Family Fabaceae (Pea family) Plant Identification. Weakened tree is often invaded directly is often invaded directly leaflets together in tightly compressed, webs. Often invaded directly caterpillars, which web foliage together and skeletonize leaflets of honeylocust trees Iowa. 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