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Banvei Vanquish.t'kartty plus 2,4 -1) works well in spring or fall. Apply any of these herbicides before Scotch thistle <br />bolts or seed production still will occur. <br />Ally -Escort (rnctsulfuronâ–ş or Telar (chIorsulfuronl also can be used list' l clar in noncrop areas only and Ally -I scort in <br />pastures. rangeland or noncrop areas. Research from Colorado State t Innvcrsity and the 1 Inrversnv of Nebraska shows <br />that fetal or Ally- I.scort prevents or dramatically reduces viable seed formation when applied in spring. up to carp <br />flower growth stages. I he latest time to apply these herbicides is when developed terminal flowers have opened up to <br />the size of a dine. <br />Apply !Oar at 1 ounce/A or Ally - Escort at 0.5 ounce A. Add a good agricultural surfactant at 0 25 percent v v 2 to .\IIy- <br />1 scort or fetal treatments or control is inadequate. <br />Perennial Sowthistle <br />MANA(:EMEN1 <br />Perennial Sowthistle are highly competitive, persistent. and can rapidly colonize new sites by vegetative reproduction. <br />Perennial Sowthistle seldom flowers In the first year. With true trots this plant creeps underground and conies up <br />meters away I lowers open two to three hours atler sunrise and close around noon Seeds are dispersed around ten <br />days alter first opening With no dormancy period a seed trom the previous year will germinate neat sprung. If seed in <br />water for more than three months it will decompose. Perennial Sowthistle also produces weds. Perennial Sowthistle <br />thrives on non - compacted, tine, rich slightly alkaline to neutral soils but does tolerate some salinity. <br />Mechanical Control of <br />By tilling below 30 cm or leaving those on the surface to desiccate may reduce infestations Me optimal timing bur <br />cultivation to reduce root energy reserves is when plants are just emerging from the ground. Repeated cultivation will <br />he necessary for most infestations. <br />Chemical Control of Piumeless Thistle <br />