The natural insecticide spinosad will control sawfly larvae. Please check out our sawfly larvae control products for more details about how they work and how, when, where they should be applied. This pest of hibiscus, hollyhock, and other ornamentals has been called the hibiscus sawfly in the scientific literature. Hibiscus Sawfly, Atomacera decepta. The name sawfly comes from the saw-like ovipositor that the female uses to cut slits in the leaf and deposit its eggs. In addition to being the hibiscus sawfly time of year, it’s also crazy busy, and I only have time for one more, quick horticultural-related story before I need to go do other things. A 50/50 mix of water and isopropyl alcohol, with a bit of mild dish soap (not detergent) as a sticker kills sawfly larvae … The larvae of some species, such as the California pear sawfly, resemble caterpillars (larvae of Lepidoptera), while others, such as the pear sawfly, look like slugs. Asked June 30, 2015, 10:32 AM EDT. The adult is small and black with a red spot and smoky wings. ... You may be referring to the hibiscus sawfly. Older larvae feed on both the upper and lower leaves, leaving just the leaf veins, resulting in a lacy appearance. Cultivars that are resistant to hibiscus sawfly attack may be available in the future. The best time to control sawflies is early in their larval stage. A Hibiscus sawfly ovipositing on my hibiscus in the yard. Hibiscus Sawfly. The thick waisted adults are relatives of bees and wasps. The hibiscus (Hibiscus spp.) Adult Atomacera … A: It’s likely the leaves are being consumed by hibiscus sawfly larvae. I can't see any bugs. The plant-feeding larvae often look like caterpillars or slugs, and many are quite noticeable because they often stay together to feed in groups and quickly cause noticeable defoliation on their hosts. However, it attacks several members of the mallow family, Malvaceae, and is perhaps best referred to as the mallow sawfly. The sawfly larvae which munch on my mugo pines can grow to close to an inch long. A report from Connecticut indicates the life cycle is about 28 days. Sawfly and larva control on ornamental hibiscus. When disturbed, the larvae of most sawfly species adopt an S-shaped pose, often raising their rear ends and waving them about. Size: Sawfly adults are about 1/2 inch long. Hopefully, breeders will be able to get this trait into horticulturally viable cultivars soon. The larvae feed on the foliage. Larvae may be sprayed directly with insecticidal soap, if needed. Sawflies Facts, Identificatio,n & Control Scientific Name. Not much is known about this critter from what I can find. She lays eggs on the underside of hibiscus leaves in early April. Eggs are laid in leaf tissue near the margin at the tip. is grown for its large, vibrant blooms, which provide a tropical atmosphere to your garden. Twelve genotypes of hibiscus were evaluated for resistance to hibiscus sawfly, a minor pest of hibiscus. A: It’s hibiscus sawfly damage. Characteristics: Sawflies may look like flies, but are actually related to bees and wasps.The common name sawfly comes from their ovipositor, which is saw-like in shape and is used by the females to cut into the plants and lay eggs. The life cycle from egg to adult is about 1 month, with the larvae pupating on the lower stems or in the soil below. Sawfly larvae come in a fascinating variety of shapes, colours and sizes – most ranging from 10-40mm in length. Photo entomology.wisc.edu . Also, when larvae are one-half full grown or larger they will do little more feeding. A common sawfly that may be found attacking hibiscus is the hibiscus sawfly. Conventional insecticides such as malathion are also effective. Plants were evaluated at the end of the study with a damage rating. Eggs are laid in older leaves and •hatch in about a week. 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