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| Publication Type:
| Report |
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| Author(s): | Daniel, W. H.;
Freeborg, R. P. |
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| Author Affiliation: | Purdue University, West Lafayette, IN |
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| Title: | Preemergent crabgrass control - 1980 |
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| Section: | Turf, ornamentals and aquatics
Other records with the "Turf, ornamentals and aquatics" Section
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| Meeting Info.: | Omaha, Nebraska: December 9-11, 1980 |
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| Source: | Proceedings: North Central Weed Control Conference. Vol. 35, 1980, p. 120. |
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| Publishing Information: | [Urbana, Illinois: Department of Agronomy, University of Illinois] |
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| # of Pages: | 1 |
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| Keywords: | TIC Keywords: DCPA; Digitaria
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| Abstract/Contents: | "Preemergent applications were made in the field on July 2, 1980 to a newly established seed bed seeded with Digitaria spp., crabgrass, prior to treatment. DCPA was applied at 11.8 kg/ha and at 11.8, and a second following treatment of 8.4 kg/ha 30, 45 and 60 days later; pendimethalin at 1.7 kg/ha and at 1.7 and another following treatment of 1.7 kg.ha in 60 days; alachlor at 3.4 and 6.8 kg/ha and at 3.4 followed with 3.4 kg/ha and 6.8 followed with 3.4 kg/ha 87 days after the initial treatment; benefin at 2.2 kg/ha and bensulide at 8.4 kg/ha were included. DCPA treatments resulted in a range of control for all rates from 100 to 69%. Control of 100 and 99% was obtained with DCPA at 11.8 and the 8.4 kg/ha rate applied 30 and 45 days after the initial application. Pendimethalin at 3.4 kg/ha resulted in 98% control, and at 1.7 plus a 60 day second application at 1.7 kg/ha gave 88% control; the 1.7 kg/ha single application resulted in 87% control. Bensulide at 8.4 kg/ha gave 66% control, and bensulide at 8.2 kg/ha resulted in 40% control. Benefin at 2.2 kg/ha gave control from 47 to 57%. Alachlor control ranged from 67 to 29%, with 6.7 kg/ha rate resulting in 52% control and the 6.7 + 3.4 kg/ha split rate at 87 days with 51% control. Alachlor at the 3.4 kg/ha rate with a second application of 3.4 kg/ha at 87 days gave 43% control, the 3.4 kg/ha single treatment gave only 29% control of crabgrass. Concern has been expressed as to the growth inhibiting effects on perennial turfgrasses of preemergent crabgrass control herbicides. To evaluate any inhibitory effect, three preemergent herbicides were applied to Wabash Poa pratensis L. plants growing in a sand bed medium in a glasshouse. Plant height, root length and weight, and rhizome production were measured after 27, 54 and 82 days of growth. Plots were treated with DCPA at 16.8 kg/ha benefin at 3.4 kg/ha, and bensulide at 16.2 kg/ha. Results showed plant height was significantly less than the untreated control for bensulide 27 days after treatment, and for benefin 27, 54 and 82 days after treatment. Plant height was significantly greater than control 27 and 82 days after treatment with DCPA. Root length was significantly less than control for both benefin and bensulide only at the 54 day harvest. Root weight was, however, significantly less than the control following applications of benefin and bensulide only at the 82 day harvest. A reduction in rhizome growth was observed only for benefin at the 54 and 82 day harvest. No growth reduction of tops, roots or rhizomes was observed throughout the 82 day period for DCPA." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Daniel, W. H., and R. P. Freeborg. 1980. Preemergent crabgrass control - 1980. Res. Rep. North Cent. Weed Control Conf. 35:p. 120. |
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