Remove dead flowers before gray mold develops. Posted by @goldfinch4 on March 10, 2013. It is important to keep an eye out for small gnats, aphids, and mealybugs, as these are the most common succulent/cactus plant pests. If disease has moved into leaf or stem parts, control may also be achieved with the use of fungicides applied as soon as symptoms are visible. Sanitation is the most important means of control. Sedum is generally resistant to pests, though mealybugs, snails, slugs, and scale insects may take interest in the plant. Identifying hosta problems. Not many plants are as resilient as these guys, yet even they face some dangers. The most common threat to sedum is excessive moisture. Sempervivum Diseases, Problems, and Pests. Pests and diseases strike large collections of succulent plants in greenhouses and small windowsill collections indiscriminately, irrespective of the experience of the grower. Pests and Diseases: Sedum plant has is no serious pests or diseases issues. Pests. As a rule, sempervivums are tough little plants that can put up with a lot of abuse before they’re overwhelmed. A thread in the Garden Pests and Diseases forum, titled Something's killing my sedum Hostas definitely make the list of easy-care perennials, and they make a great addition to almost any garden. However, a few precautions can reduce the frequency with which the problem occurs. Sedums rarely show signs of pests and diseases, but they are not completely immune. Pests and Diseases of Sedum. Give these hardy succulents the right conditions, and they will seldom have trouble with pests or insects. Boasting succulent-like leaves and large flowers, most insects don’t bother sedum. But unfortunately succulents do develop issues from time to time and we need to be equipped to get them through the tough times as quickly as possible. Disease is favored by cool wet conditions and the presence of overripe fruit or old flower petals. Snails and slugs may also be problematic outdoors. One of the great things about growing succulent plants is the lack of pests they attract. Catch these hosta troubles early, though, and you won’t have as much damage to deal with. While pests are fewer on these plants, they may still sometimes attack. But every once in a while, these stars of the shade can still run into a few problems — even with perfect growing conditions. Hardy, Tough and Disease Resistant Hens and Chickens. Common Pests & Diseases Treatment for Succulents No one wants to witness their beloved succulents deal with annoying pests or fungal diseases. Fortunately, Sempervivum have very few problems that aren’t caused by some mishandling of their environment. Watch for aphids and flies. Extended rains or overwatering can lead to an accumulation of moisture, causing rot, mold, or fungus. Fortunately, they are relatively easy to control and prevent. 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