65 On-farm demonstrations improve producer understanding of using metsulfuron for tall fescue seedhead suppression

摘要

In 2018, a series of 4 on-farm demonstrations were conducted using a metsulfuron herbicide for tall fescue (Lolium arundinaceum) seedhead suppression to increase producer awareness of this practice. Chaparral© herbicide was applied prior to the boot stage (April 5–April 21, 2018) and the design was an unreplicated field with side by side treated and untreated areas. Forage samples were taken to determine yield, nutritive value, species composition and ergovaline level. Treatment with Chaparral© increased crude protein (12.1 vs. 14.2%) while reducing yield (5477 vs. 3738 kg/ha) and tall fescue seedhead proportion (42.8 vs. 25.4%) (P < 0.05). Total digestible nutrients tended to be higher (57.2 vs 59.2%, P = 0.08) and ergovaline level tended to be lower (901 vs. 491 ppb, P = 0.11) with treatment. Workshops were held to report the demonstration results. Total workshop registration was 147 with 91 evaluations completed. Participants were 78% male and 22% female with 65% being over the age 50. The pasture hectares grazed by participants was 4253 with 1415 ha as hay. Attendee’s livestock inventories were 6357 beef cattle, 105 sheep, 66 goats and 70 horses. Post-workshop evaluation indicated that 100% of attendees increased understanding of fescue toxicosis, management strategies to reduce fescue toxicity and of using metsulfuron for seedhead suppression. Evaluations completed at the conclusion of each workshop (n = 90) indicated satisfaction with (scale of 1 = not satisfied to 4 = very satisfied, mean ± SD): instructors’ knowledge (3.86 ± 0.34), workshop environment/format (3.83 ± 0.37), and overall quality (3.82 ± 0.41). One hundred percent indicated that this workshop met their expectations and they would recommend it to others. Producer interest and responses indicate that on farm demonstrations are an effective method for education of new production practices