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<blockquote data-quote="simme" data-source="post: 1687556" data-attributes="member: 40418"><p>Chaparral herbicide can be used to suppress seed head development in tall fescue. Undesirable if you are combining seed, but may have benefit if you are grazing. Never tried it. Per the label:</p><p></p><p>"<strong>Tall Fescue Precautions</strong>: Chaparral may stunt tall fescue, cause it to turn yellow, or cause seed head suppression. To minimize these symptoms, take the following precautions. • Do not use on tall fescue grown for seed. • Do not use more than 2 ounce/acre of Chaparral. • Tank-mix Chaparral with 2,4-D. • Use a reduced rate of non-ionic surfactant at 1/2 to 1 pint per 100 gallons of spray solution (1/16 to 1/8 % v/v). • Make application later in the spring after the new growth is 5 to 6 inches tall (until after reproductive culm has started to elongate), or in the fall. • Do not use surfactant when liquid nitrogen is used as a carrier. • Do not use a spray adjuvant other than non-ionic surfactant. Initial grass yields may be reduced due to fescue seed head suppression resulting from treatment with Chaparral at labeled rates. However, this could be beneficial because in tall fescue infected with the fungal endophyte (Neotyphodium spp.), the endophyte is concentrated in the seed, and cattle grazing plants with the seed head will get the maximum exposure to the endophyte. Increased levels of ingestions of the fungal endophyte can reduce weight gain and conception rates in cattle. Since the first grazing is often delayed in the spring until long after seed head development, Chaparral could potentially be used to reduce development of the seed head, thereby reducing the amount of the endophyte that would be consumed by livestock when grazing (see below). </p><p><strong>Tall Fescue Seed Head Suppression and Broadleaf Weed Control</strong>: Chaparral herbicide can be used to reduce the number of seed heads of tall fescue when applied prior to flower emergence. For best results apply 2.0 to 2.5 ounce/acre Chaparral after initial greenup when grass height is approximately 6 inches. Later applications may still be effective, however, the seed head suppression will be less effective, and the number of seed heads could be noticeable higher. Many weed species can be controlled with this application timing in addition to the suppression of seed head development."</p></blockquote><p></p>
[QUOTE="simme, post: 1687556, member: 40418"] Chaparral herbicide can be used to suppress seed head development in tall fescue. Undesirable if you are combining seed, but may have benefit if you are grazing. Never tried it. Per the label: "[B]Tall Fescue Precautions[/B]: Chaparral may stunt tall fescue, cause it to turn yellow, or cause seed head suppression. To minimize these symptoms, take the following precautions. • Do not use on tall fescue grown for seed. • Do not use more than 2 ounce/acre of Chaparral. • Tank-mix Chaparral with 2,4-D. • Use a reduced rate of non-ionic surfactant at 1/2 to 1 pint per 100 gallons of spray solution (1/16 to 1/8 % v/v). • Make application later in the spring after the new growth is 5 to 6 inches tall (until after reproductive culm has started to elongate), or in the fall. • Do not use surfactant when liquid nitrogen is used as a carrier. • Do not use a spray adjuvant other than non-ionic surfactant. Initial grass yields may be reduced due to fescue seed head suppression resulting from treatment with Chaparral at labeled rates. However, this could be beneficial because in tall fescue infected with the fungal endophyte (Neotyphodium spp.), the endophyte is concentrated in the seed, and cattle grazing plants with the seed head will get the maximum exposure to the endophyte. Increased levels of ingestions of the fungal endophyte can reduce weight gain and conception rates in cattle. Since the first grazing is often delayed in the spring until long after seed head development, Chaparral could potentially be used to reduce development of the seed head, thereby reducing the amount of the endophyte that would be consumed by livestock when grazing (see below). [B]Tall Fescue Seed Head Suppression and Broadleaf Weed Control[/B]: Chaparral herbicide can be used to reduce the number of seed heads of tall fescue when applied prior to flower emergence. For best results apply 2.0 to 2.5 ounce/acre Chaparral after initial greenup when grass height is approximately 6 inches. Later applications may still be effective, however, the seed head suppression will be less effective, and the number of seed heads could be noticeable higher. Many weed species can be controlled with this application timing in addition to the suppression of seed head development." [/QUOTE]
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