I've nipped out a few ends to help it bush out and it's looking good but all the new growth has a thick covering of black aphids being carefully tended by ants. Powdery mildew: White fungal growth develops on … Like leafhoppers, plant bugs inject a toxin into your plants’ leaves, buds, and shoots as they feed. I used an insecticide on it (I've used this on the rose bushes before), but now I'm wondering if that was a mistake. It is an unattractive nuisance, but … Clematis are remarkably free from pests and diseases. Spider mites also have a range of natural predators, including other mites like Phytoseiulus sp. I have successfully maintained my gardens pesticide and chemical fertilizer free for years. The first rule is to keep the plants healthy and vigorous. Damage to Clematis Flowers - Answered Small Green Caterpillars on Kale Leaves - Answered Black Bugs on Tomato Plant, Part III - Using a Keyboard Vaccuum to Kill Flea Beetles Phoma (formerly, Ascochyta) clematidina: See leaf spot management above. Hi, I am having a problem with some bug eating the petals right off of the blooms of my clematis. The most common plant bugs of interest to gardeners are cinch bugs, harlequin bugs, and squash bugs. Compare clematis with roses for example and it quickly becomes clear that pound for pound, clematis come out winners every time! Clematis wilt: Plants with dark brown to black Ascochyta leaf spots develop a stem canker that leads to plant wilting and dieback. Clematis wilt, also called clematis leaf and stem spot, is a fungal disease that progresses rapidly. Prune infected stems. The result is a plant mottled with brown or black spots and deformed growth. The sooty substance is actually called sooty mold, and it is a fungus that is spread by insects. Powdery Mildew. A careful observer may see black spots on the leaves and stems as the disease begins, but the symptoms often go undetected until the entire stem wilts and dies. Here we have the main pests that can attack clematis, and the main diseases they can contract. What Was the Black Soot on My Gardenias? I'm including fungus gnats as a common houseplant pest, only because they are common and more of an annoyance to people versus plants. Enter your price ! I know the problem is not slugs. Enter your price ! Only the petals and not the foliage. Enter your price ! and generalist predators like minute pirate bugs and lacewing larvae. Earwigs. Yesterday I found little tiny black aphid-looking bugs on one of my clematis plants. 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