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Publication Information

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Title: Oxyfluorfen strongly affects Larix occidentalis but minimally affects Sagina procumbens in a bareroot nursery

Author: Dumroese, R. Kasten; Williams, Jasmine L.; Pinto, Jeremy R.; Zhang, Peng;

Date: 2014

Source: HortScience. 49(5): 603-907

Publication Series: Scientific Journal (JRNL)

Description: Our objective was to evaluate oxyfluorfen for control of birdseye pearlwort (Sagina procumbens L.) in a bareroot nursery crop of western larch (Larix occidentalis Nutt.) seedlings. Oxyfluorfen applied at rates up to 0.56 kg a.i./ha in a split-plot experiment with combinations and frequencies of pre- and postemergence sprays gave minimal control of birdseye pearlwort. Although preemergence rates 0.42 kg a.i./ha or greater reduced western larch emergence 10% compared with the control, final seedling inventory was similar for rates 0.42 kg a.i./ha or less. Seedlings receiving 0.42 kg a.i./ha or greater grew 30% more biomass than those that received 0.28 kg a.i./ha or less. When applied postemergence, oxyfluorfen reduced the number of larch seedlings at final inventory 9% and those seedlings had 20% less biomass than the control. Oxyfluorfen applied preemergence increased the amount of bare soil (reduced the weed canopy) throughout the production cycle compared with the control but even the most efficacious treatment combinations still had birdseye pearlwort canopy coverage 63% or greater.

Keywords: biomass, canopy cover, Larix occidentalis, postemergence, preemergence, Sagina procumbens, seedling emergence

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Dumroese, R. Kasten; Williams, Jasmine L.; Pinto, Jeremy R.; Zhang, Peng. 2014. Oxyfluorfen strongly affects Larix occidentalis but minimally affects Sagina procumbens in a bareroot nursery. HortScience. 49(5): 603-907.

 


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