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 / PONTEDERIACEAE (pickerel-weed family)<br />
<strong>Weed</strong> name: M<strong>on</strong>ochoria vag<strong>in</strong>alis<br />
(Burm. f.) Presl<br />
Syn<strong>on</strong>yms: N<strong>on</strong>e<br />
Local names:<br />
Country Comm<strong>on</strong> name<br />
Bangladesh panee kachu<br />
Cambodia chrach (Khmer)<br />
India neerthomarai (Tamil)<br />
Ind<strong>on</strong>esia et jeng padi<br />
Korea mooldalgebi<br />
Malaysia keladi agas (Malay)<br />
Philipp<strong>in</strong>es biga-bigaan (Tagalog)<br />
Thailand n<strong>in</strong>lab<strong>on</strong><br />
USA m<strong>on</strong>ochoria<br />
Vietnam rau mác lá th<strong>on</strong><br />
Life cycle: A perennial aquatic<br />
m<strong>on</strong>ocotyled<strong>on</strong>ous plant. May behave<br />
like an annual <strong>in</strong> flooded ricefields,<br />
where it grows as tall as 50 cm.<br />
Propagates by seeds.<br />
Habitat: A lowland weed that grows<br />
well <strong>in</strong> subaquatic to aquatic c<strong>on</strong>diti<strong>on</strong>s.<br />
<strong>Weed</strong>y nature: In saturated soils,<br />
seeds germ<strong>in</strong>ate throughout the<br />
grow<strong>in</strong>g seas<strong>on</strong>, enabl<strong>in</strong>g seedl<strong>in</strong>gs to<br />
emerge and establish after earlyseas<strong>on</strong><br />
weed c<strong>on</strong>trol. A very aggressive<br />
weed <strong>in</strong> soils with high N levels.<br />
Agricultural c<strong>on</strong>cern: Can reduce<br />
rice yields 85%.<br />
Seedl<strong>in</strong>g<br />
Mature plant<br />
Inflorescence<br />
Seed, magnified<br />
<strong>Weed</strong>s worldwide 23
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