WEEDS AND THEIR CONTROL 



LOSSES CAUSED BY WEEDS 



1. Weeds rob the plants of nutriment. 



2. Weeds rob the plants of water. 



511 



3. Weeds, shade, crowd and weaken cultivated plants. 



4. AYeeds harbor pests such as insects, disease, rabbits, mice, 

 etc. 



5. Weeds injure and often kill stock. 



6. Weeds increase labor, make harvesting difficult and detract 

 from the appearance of the farm. 



7. Weed seeds mixed with grain or other seed always lowers 

 the price. 



8. AYeeds stop up drainage and often cause great loss. 



FIFTY WORST WEEDS* 



Table I gives an alphabetical list of the fifty worst weeds of 

 the United States, with such information as will enable the 

 reader: (1) To identify them, (2) to determine the nature and 

 place of their greatest injuriousness, (3) to determine their 

 duration or natural length of life; that is, whether annual, bien- 

 nial, or perennial. AVith this knowledge one will be able to attack 

 much more intelligently any troublesome weed. 



* United States Department of Agriculture. 



