Answer: It could be that your succulent plants are falling prey to white grubs munching on their roots. The grubs are fat, creamy-colored, have brown heads, and curl up in a spiral when disturbed. Dig up the dead plants and see if they are present. Beneficial nematodes and milky spore disease are two organic controls for these pests. Another culprit could be wireworms, bright coppery-orange, thin worms. They can be especially numerous in areas where sod has been removed to make a garden. They are harder to control organically, but you can trap a good number of them by placing pieces of potato in the garden where you've seen them. They prefer the soft potato tissue, and will collect there, and you can destroy them. Best of luck!
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