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| Publication Type:
| Report |
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| Author(s): | King, J. W.;
Miller, E. M. |
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| Author Affiliation: | Dep. of Agronomy, Univ. of Arkansas, Fayetteville, AR |
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| Title: | Conventional vs controlled droplet application of MSMA for crabgrass control |
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| Section: | Weed control in agronomic crops including turf and pastures
Other records with the "Weed control in agronomic crops including turf and pastures" Section
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| Meeting Info.: | Biloxi, Mississippi: January 18-20, 1983 |
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| Source: | Proceedings: Southern Weed Science Society 36th Annual Meeting. Vol. 36, 1983, p. 130. |
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| Publishing Information: | Champaign, Illinois: Southern Weed Science Society |
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| # of Pages: | 1 |
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| Abstract/Contents: | "In some spray operations, controlled droplet applicators (CDA) have been said to require lower rates and lower spray volumes and to give more even coverage. If it proves effective for herbicide application in turf, the new hand held CDA could be especially useful on small to medium turf areas, roadsides and steep slopes. Field and greenhouse studies were conducted under turf conditions to compare a CDA with a conventional sprayer using MSMA at standard rates for turf (2 + 2 + 2 and 3 + 3 + 3 kg ai/ha) and lower than normal rates. The MSMA used contained a surfactant. In the field, rates were 0.5 + 0.5 + 0.5, 1.0 + 0.5 + 0.5, 1 + 1 + 1, 2 + 1 + 1, 2 + 2 + 2, 3 + 3 + 3, 4 + 2 + 2 and 4 + 4 + 4 kg ai/ha. In the greenhouse, the second lowest and the two highest treatments were not included. With the Micron Herbi 77 CDA, an atomizer driven by a battery-powered motor created 250-micron droplets. Flow rate was 14 L/ha. The conventional sprayer was a CO2 pressurized backpack sprayer with an output of 300 L/ha through 8003 tee-jet nozzles. Crabgrass plots, established in the field from seed on May 21, 1982, were maintained under turf conditions and were mowed weekly at 6 cm. Plots were sprayed on July 19 and August 2 and 12. In the greenhouse, crabgrass was seeded on September 28 into 10-cm diameter pots filled with soil. Plants were left unclipped. Pots were sprayed on November 24 and December 6 and 15. Lower than normal rates of MSMA did not give acceptable crabgrass control in the field from either the CDA or conventional sprayer. Good control resulted from either application method with the 4-kg rate. Better field crabgrass control resulted from the standard rate of MSMA through the conventional sprayer. In the greenhouse, the CDA controlled crabgrass better than the conventional sprayer with 3 applications at 0.5, 1.0, and 3.0 kg. In part, difference seen between field and greenhouse may be due to physiological differences in the plants. Crabgrass in the field was more mature and had a stronger root system. Since crabgrass in the field was being mowed, these plants formed a more dense mat and were less open than those in the greenhouse. Droplets from the CDA may have been less able to penetrate this canopy. This study showed that using reduced rates of MSMA through a CDA did not result in acceptable crabgrass under turf conditions." |
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| Language: | English |
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| References: | 0 |
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| Note: | "Room for growth: Our responsibility"
This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
King, J. W., and E. M. Miller. 1983. Conventional vs controlled droplet application of MSMA for crabgrass control. South. Weed Sci. Soc. Proc. 36:p. 130. |
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