Submitted to: Association for the Advancement of Industrial Crops Conference
Publication Type: Abstract Only
Publication Acceptance Date: January 10, 1997
Publication Date: N/A
Technical Abstract: Metolachlor and pendimethalin are preemergence herbicides used in kenaf (Hibiscus cannibinus L.) research and under consideration for registration for kenaf. As the result of the quick germination and emergence of kenaf, often within 48 h of planting, research studies were conducted to determine the effect of metolachlor and pendimethalin applications on newly yemerged kenaf seedlings. The experiments were conducted during a four yea period at Lane, OK on a Bernow fine sandy loam, 0 to 3% slope, (fine- loamy, siliceous, thermic Glossic paleudalf). Each experiment was a randomized complete block design with four replications planted with kenaf cultivar Tainung #2. Herbicides were applied over kenaf seedlings in the late cotyledon stage. Herbicide treatments included the application of metolachlor at 1.7 and 3.4 kg ai ha**1and pendimethalin at 1.1 and 2.2 kg ai ha**1. Each study also included a weedy check, and a weed free treatment. Pendimethalin resulted in greater herbicide injury to kenaf seedlings compared to the weedy check, weed free or metolachlor treatments. Pendimethalin treatments produced shorter kenaf plants and less plants per hectare. Pendimethalin at 2.2 kg ha**1 reduced stalk yields.