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Page 17 of~23 <br />Houndstongue <br />Appendix l <br />Houndstongue contains toxic alkaloids that stop liver cells from reproducing. Therefore, houndstongue <br />reduces livestock and wildlife forage and grazing animals should be kept away. Animals may live six or <br />more months after eating a lethal dose of houndstongue. Houndstongue is an early sucessional species on <br />recently disturbed sites. Houndstongue is common on gravelly, alkaline soils Maintaining a healthy <br />population of native perennials is the best way to prevent the establishment and spread of houndstongue <br />Mechanical Control of Houndstongue <br />Mowing second year plants during flowering but before seed maturation reduces seed production and may <br />kill the plant, <br />Chemical Control of Houndstongue <br />Picloram at 0 35-0 t Ib., 2,4-D, or dicamba at 1 0 lb , or metsulfuron at 0 6 oz. ai/acre applied in spring <br />provides control of houndstongue. Spring treatments with pocloram, dicamba, or metsulfuron are more <br />effective than fall treatments. Chlorsufuron applied U 5 Ib ai/ac gave complete control when applied any <br />time beginning with the rosette stage until the bolted plant had attained ] 0 inches in height. <br />~I:~w:~ct:Mt:ti-r <br />