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How to Manage Pests

The UC Guide to Healthy Lawns

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Sheaths

The lower portion of the leaf blade that encircles the stem is the sheath.

Sheath is split Margins of the
sheath overlap		 Sheath is closed
Illustration of collar with split sheath Illustration of sheath with overlapping margins Illustration of sheath with closed margins

Identification characteristics

Statewide IPM Program, Agriculture and Natural Resources, University of California
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