Paper · 2023 · Scholarworks (University of Massachusetts Amherst)

Control of Poa annua L. infestations in sports turf with Lolium perenne L. and ethofumesate.

Bell, David K.

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Abstract

Tiller Counts Over Time of Center Plants of Ryegrass Kentucky Bluegrass, and Annual Bluegrass in Experiment 1.26 2+3.Mean Tiller Count of A-34 (Figure 2) and Baron (Figure 3) Before and After Treatment with 5 Rates of Ethofumesate and Control.52 4+5.Mean Tiller Count of Touchdown (Figure 4) and Annual Bluegrass (Figure 5) Before and After Treatment with 5 Rates of Ethofumesate and Control ... 53 6+7.Mean Tiller Counts of "Penncross" (Figure 6) and "Penneagle" (Figure 7) Before and After Treatment with 5 Rates of Ethofumesate and Control.56 8. Mean Shoot Dry Weight in Grams of A-34, Baron, Touchdown, Annual Bluegrass, Penncross, and Penneagle After Treatment with 5 Rates of Etho fumesate and Control.58 9. Mean Root Dry Weight in Grams of A-34, Baron, Touchdown, Annual Bluegrass, Penncross, and Penneagle After Treatment with 5 Rates of Ethofumesate and Control .59 10.Mean Root Length in Centimeters of A-34, Baron, Touchdown, Annual Bluegrass, Penncross, and Penneagle After Treatment with 5 Rates of Ethofumesate and Control .61 11.Abnormal Growth of Crown Tissue and Nodes of Stolons on Penncross' creeping bentgrass treated with 0.84 kg/ha of Ethofumesate.6212. Abnormal Growth of Crown Tissue of Poa annua L. Treated with 0.42 kg/ha of Ethofumesate.63 13.Abnormal Growth of Crown Tissue and Rhizomes on A-34 Treated with 6.72 kg/ha of Ethofumesate (right plant), and Control (left plant) .64 14.Mean Scores over Time of Turfgrass treated with Pre-emergence Ethofumesate Application and Control, Experiment 1 -1981.7615.Mean Scores Over Time of Turfgrass Treated with Pre-emergence Ethofumesate Applications and Control, Experiment: 1 -1982 .77 16.Mean Scores over Time of Turfgrass Treated with Post-emergence Ethofumesate Application and Control, Experiment 1 -1981.7917.Mean Score Over Time of Turfgrass Treated with Post emergence Ethofumesate Applications and Control, Experiment 1 -1982 80 vi 18. Mean Scores over Time of Turfgrass Treated with both Pre-and Post-emergence Ethofumesate Applications and Control, Experiment 1 -1981.8119.Mean Scores over time of Turfgrass Treated with both Pre-and Post-emergence Ethofumesate Applications and Control, Experiment 1 -1982 .83 20.Mean Score over Time of Turfgrass Treated with Pre-emergence Ethofumesate Application and Control, Experiment 2 -1981.87 21.Mean Score over Time of Turfgrass Treated with Pre-emergence Ethofumesate Applications and Control, Experiment 2 -1982 .88 22. Mean Score over Time of Turfgrass Treated with Post-emergence Ethofumesate Applications and Control, Experiment 2 -1981.8923.Mean Scores over Time of Turfgrass Treated with Post-emergence Ethofumesate Applications and Control, Experiment 2 -1982 .91 24.Mean Score over Time of Turfgrass Treated with both Pre-and Post-emergence Ethofumesate Applications and Control, Experiment 2 -1981.9225.Mean Scores over Time of Turfgrass Treated with both Pre-and Post-emergence Ethofumesate Applications and Control, Experiment 2 -1982 .93 26.Mean Scores over Time of Turfgrass Treated with Pre-and Post-emergence Ethofumesate Applications and Control, Experiment 3 -1981.9727.Mean Score over Time of Turfgrass Treated with Pre-emergence Ethofumesate Applications and Control, Experiment 3 -1982 .98 28.Mean Score over Time of Turfgrass Treated with Post-emergence Ethofumesate Applications and Control, Experiment 3 -1981.10029.Mean Scores over Time of Turfgrass Treated with Post-emergence Ethofumesate Applications and Control, Experiment 3 -1982 .10130.Mean Score over Time of Turfgrass Treated with both Pre-and Post-emergence Ethofumesate Applications and Control, Experiment 3 -1981.10231.Mean Scores over Time of Turfgrass Treated with both Pre-and Post-emergence Applications and Control, Experiment 3 -1982 103 32.Diagram of Template Used in Competition Experiments 1-4 to Insure Uniform Plant Spacings.

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