Seed Safening from Herbicidal Injury in Switchgrass Establishment

Crop Science

Baldwin, Brian S.⁴  Rushing, J. Brett⁴  Taylor, Alan G.³  Owens, Vance N.¹  Fike, John H.⁵  Moore, Ken J.² 

[1] Dep. of Plant Science, Box 2207A, Brookings, SD 57007$$;Dep. of Agronomy, 2104 Agronomy Hall, Ames, IA 50011$$;Dep. of Horticulture, 630 West North St., Geneva, NY 14456$$;Dep. of Plant and Soil Sciences, Box 9555, Mississippi State, MS 39762$$;Dep. of Crop and Soil Environmental Sciences, 365 Smyth Hall, Blacksburg, VA 24061$$

关键词: Segmentation;    Bio-cell Organelles;    Fluorescence Microscopy;    Ellipse Detection;   

DOI  :  10.2135/cropsci2013.01.0050

学科分类：农业科学（综合）

来源: Crop Science

【 摘 要 】

Weed control during the establishment year of switchgrass (Panicum virgatum L.) is critical for a successful stand. Laboratory and field studies were conducted for 2 yr to evaluate the effectiveness of seed safeners for protecting switchgrass seed from the preemergent herbicide metolachlor. Initial evaluations of six seed safeners determined that fluxofenim was the only successful protectant tested for switchgrass seedling germination. Safener rates 0, 25, 50, and 100% of the recommended rate (40 mg a.i. 100 g per seed), method of application (coating vs. controlled hydration), ecotype (lowland vs. upland), dry matter yield, and number of crowns per row were analyzed in replicated field trials conducted in Starkville, MS, Ames, IA, Blacksburg, VA, and Brookings, SD, in a randomized complete block design. Two establishment years were planted in single-row (6.1 m) plots spaced 50.8 cm apart. Subsequent biomass yield was harvested at the end of each growing season. Exceptional stands were achieved with all rates of safener in both years due to the reduction or elimination of annual grassy weeds and no crop injury was experienced at any test location. The controlled hydration (combination of 25, 50, or 100% fluxofenim) method resulted in significantly greater yields and crown counts than the coating technique at most locations for both years.

【 授权许可】

Unknown