A handbbok on Weed Control in Rice.pdf
A handbbok on Weed Control in Rice.pdf
A handbbok on Weed Control in Rice.pdf
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Lowland rice weeds / CYPERACEAE (sedge family)<br />
<strong>Weed</strong> name: Scirpus maritimus L.<br />
Syn<strong>on</strong>yms: N<strong>on</strong>e<br />
Local names:<br />
County Comm<strong>on</strong> name<br />
France scirpe maritime<br />
Peru coco grande (Spanish)<br />
Philipp<strong>in</strong>es apulid (Tagalog)<br />
Life cycle: A perennial sedge that<br />
spreads by tubers.<br />
Habitat: Grows <strong>in</strong> wet and flooded<br />
soils.<br />
<strong>Weed</strong>y nature: Tubers have<br />
dormancy. Stems grow rapidly dur<strong>in</strong>g<br />
early rice growth and may severely<br />
shade semidwarf rice cultivars dur<strong>in</strong>g<br />
the first 40 d. Difficult to c<strong>on</strong>trol<br />
because of apical bud dormancy and<br />
capacity to produce numerous tubers.<br />
Establishes, spreads, and becomes a<br />
dom<strong>in</strong>ant weed with<strong>in</strong> a short time.<br />
Agricultural c<strong>on</strong>cern: Very competi-<br />
tive <strong>in</strong> lowland rice. <strong>Rice</strong> yield losses of<br />
60-80% can occur. Difficult to eradi-<br />
cate because of dormant tubers and<br />
buds.<br />
Mature plants <strong>in</strong> the field<br />
Mature plant<br />
Tubers and rhizomes<br />
Vegetative shoot<br />
<strong>Weed</strong>s worldwide 13
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