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conducted in Middle Park near Pa shall, I elar at 1 25 ounce 'A applied during flowering or in fall controlled 84 percent <br />of yellow toadtlax one year later. <br />'tort, 2,4 -D amine, native!, and Paramount controlled from S percent to 24 percent of yellow toadtlax one year after <br />single treatments were applied at flowering. Plateau showed some potential to control yellow toadtlax in another <br />Colorado experiment where 8 fluid ounces per acre applied once in tall controlled 59 percent of yellow toadtlax one <br />year later. While this level of control is unsatisfactory, sequential treatments may increase control hut expenmenls must <br />he conducted to test this hypothesis. <br />Mechanical and Chemical Control of Yellow Toadflaa <br />Mowing combined with spraying Tordon did not improve control in an experiment conducted near liespenis, Colorado. <br />Yellow toadflax was mowed three times per year then treated with Tordon at 4 ptiA in fall for two consecutive years <br />and compared to fordon applied at 4 ptKA at flowering also for two consecutive years. Yellow toadflax control was the <br />same (85 percent) whether 'I ordon treatments were combined with mowing or not. <br />Dalmation toadflax <br />MANA(;EMEN1 <br />Figure 2: I)AI.MA FION IOADFLAX (/,snorts dalmattea (1, ) Mill. !.inures gentrtiiJ ssp. !humane() (1 _.) Maire <br />PetitmcnginI Noxious This differs from yellow toadflax principally in being larger and having differently shaped <br />leases ('lumps of stems are 3 to 4 feet tall. Waxy leaves are broad. ovate, sometimes heart shaped and upper leaves <br />clasp the stem (an important difference). Seeds are irregular in shape. angular, somewhat flattened, thin - edged, strongly <br />netted. tan -gray and 1 to 1/16 inch across It is not as common, hut is more aggressive than yellow toadtlax. 11 is <br />reported in various parts of the state from 5,000 to 6.500 test <br />