Expertshowever, have discovered that the slug's evil reputation as an enemy of home gardeners may, in fact, be groundless to some degree． Although it is true that a slug can devour【吞食） garden plants from the roots up in amazing quantities, it also produces nutrients（养分）for the soil, which help other plants grow． The diet of a slug consists of plant waste and mould, as well as living plants, making it a sort of natural recycling center． The unique structure of a slug digestive system enables it to take these discarded（弃置） products, transform them into the nutrients that plants need, and then release those nutrients harmlessly as wastes．

　　To some, this situation is unacceptable． No gardener wants to sacrifice his or her plants just to gain a few nutrients that could easily be provided by fertilizers(化肥）In order to achieve a balance, both slug and gardener may have to compromise some things． One relatively easy step is to separate plants with high slug appeal from those with low appeal． That way, the sections of the garden spared for plants with high slug appeal can contain plants that the gardener is willing to sacrifice so as to protect those plants that have a lower slug appeal ． Another possibility is to leave some ground-covering plants in a less tidy state slugs particularly enjoy semi-decayed (半腐烂的)plant matter． The slugs will then be drawn toward this decaying matter instead of toward the living plants．

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