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Books Books 1 - 2 of 2 on Extermination. — Plants of this species produce an enormous number of seeds. The....
" Extermination. — Plants of this species produce an enormous number of seeds. The young plants are easily destroyed by cutting off below the ground. Covering the young plants is not effective unless the entire plant is covered. Older plants may be destroyed... "
Some Weeds of Iowa - Page 421
by Louis Hermann Pammel - 1903 - 235 pages
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Bulletin, Issue 4

1913
...fields and in gardens as well as along highways. .•c Extermination. — Plants of this species produce an enormous number of seeds. The young plants are...produces destroys other vegetation underneath it. Chemical Composition.— According to a report of the Bussey Institution, the chemical composition...
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The Weed Flora of Iowa

Louis Hermann Pammel, Charlotte Maria King, John Nathan Martin, Jules Cool Cunningham, Ada Hayden, Harriette Susan Kellogg - Botany - 1913 - 912 pages
...fields and in gardens as well as along highways. Extermination. — Plants of this species produce an enormous number of seeds. The young plants are...produces destroys other vegetation underneath it. Chemical Composition. — According to a report of the Bussey Institution, the chemical composition...
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