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LIST C <br /> Puncturevine - Tribulus terrestris <br /> The trailing stems of puncturevine can grow up to 3 feet long, which <br /> create a mat-forming plant with an extensive root system. This annual <br /> plant produces burs that can injure humans and animals, as well as <br /> puncture tires. The plant contains a photosensitizing agent that ad- <br /> versely affects livestock. Commonly known as goathead or sandbur. <br /> Identification: <br /> • Flowers: Single, bright yellow. <br /> • Leaves: Opposite, divided into 3 to 7 pairs of leaflets. <br /> • Fruit: Gray, woody, 5-lobed bur. <br /> Control Methods: <br /> Biological: <br /> Microlarinus lareynii - Seed-feeding weevil <br /> Microlarinus lypriformis - Stem-boring weevil <br /> Mechanical: <br /> Frequent hand-pulling or light tillage prior to seed production. <br /> Chemical: <br /> Chlorsulfuron: Apply pre-emergence or early post-emergence. <br /> 2,4-D + Dicamba: Apply as seedlings emerge in spring and <br /> continue through growing season. <br /> *Glyphosate: Apply to early growth stages, emergence and <br /> rosettes. <br /> Pendimethalin: A pre-emergence spray. <br /> * Non-selective chemical, will kill all vegetation it contacts <br /> 62 <br />