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Information on the benefits and harmful effects of weeds, emphasizing the importance of proper identification for effective control. It covers various methods for identifying weeds, including comparison with drawings and photographs, use of weed keys, and seeking help from specialists. The document also discusses the classification of weeds based on their physical features and life cycles, and the significance of identifying weeds during the cotyledon stage.
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For a farmer or gardener to do an effective job of controlling troublesome weeds, exact identification of the weed is important.
The selection of the most effective control method depends on one’s ability to properly identify the problem species.
a. Most weeds can be placed into two convenient groups: narrow-leafed or broad- leafed.
b. Like other plants, weeds have varying types of life cycles:
d) Stem variations such as rhizomes, stolons, and tubers are helpful in identification. e) Taproots of the broad-leafed weeds differentiate them from the fibrous roots of grasses. f) The fruits and seeds of weeds are all unique in their shape, size, markings, and color.
Annual Bluegrass
Poa Annua
Annual
Cool season
Bermuda Grass
Cynodon dactylon
Perennial
Dormant in the cool season
Broadleaf Plantain
Plantago major
Perennial
Bur Clover
Medicago polymorpha
Annual
Cool season
Common Goundsel
Senecio vulgaris
Annual
Cool season
Crabgrass
Digitaria ischaemum
Annual
Warm season