2017-2018 Snow Mold Control Evlution: Mrquette Golf Club Mrquette, MI Kurt Hockemeyer nd Pul Koch, Ph.D. Deprtment of Plnt Pthology University of Wisconsin-Mdison OBJECTIVE To evlute fungicides for the control of Typhul blight (cused by Typhul incrnt) nd Microdochium ptch (cused by Microdochium nivle) on golf course turfgrss. MATERIALS AND METHODS This evlution ws conducted t Mrquette Golf Club in Mrquette, MI on creeping bentgrss (Agrostis stolonifer) nd nnul bluegrss (Po nnu) golf course firwy mintined t height of 0.5 inches. Individul plots mesured 3 ft x 10 ft nd were rrnged in rndomized complete block design with four replictions. Individul tretments were pplied t nozzle pressure of 40 p.s.i using CO2-pressurized boom spryer equipped with two XR Teejet AI8004 VS nozzles. All fungicides were gitted by hnd nd pplied in the equivlent of 1.5 gllons of wter per 1000 ft 2. Grnulr pplictions were mde by evenly spreding pre-weighed mount of product over the designted plots. pplictions were mde on 12 Oct 2017 nd lte pplictions were mde on 6 Nov 2017. The experimentl plot re ws not inoculted. Snow cover ws present from mid November through lte April, totl of pproximtely 170 dys. severity, turf qulity, nd color were mesured on 30 Apr 2018. severity ws visully rted s percent re ffected, turfgrss qulity ws visully rted on 1-9 scle with 6 being cceptble, nd chlorophyll content (turfgrss color) ws rted using FieldScout CM 1000 Chlorophyll Meter from Spectrum Technologies, Inc. (Auror, IL). mens were nlyzed using Fisher s LSD method nd re presented in Tble 1. RESULTS AND DISCUSSION Nontreted controls verged 99% disese, indicting extremely high disese pressure. On verge bout 75% of the disese present ws cused by T. ishikriensis nd 25% ws cused by M. nivle. Any tretment providing greter thn 90% control under these circumstnces performed exceptionlly well, nd there were surprising 22 tretments tht met this stndrd. In ddition, ny tretment providing greter thn 80% control in this tril will provide good control under most environments, nd there were nother 10 tretments tht met tht stndrd. Turf qulity nd turf color mostly reflected disese severity, though visible phytotoxicity ws observed with tretment 72.
Tble 1: Men snow mold severity, turf qulity, nd turf color were ssessed on April 30, 2018 t Mrquette Golf Club in Mrquette, MI. Appliction 1 Non-treted control 99.0 1.0q 77.8OPQ 2 Kbuto 98.0 1.0q 78.0OPQ 3 Kbuto 97.0b 1.0q 77.0OPQ 4 Kbuto 1.6 fl oz/1000 ft2 98.0 1.0q 72.8Q 5 Tekken 3.0 fl oz/1000 ft2 99.0 1.0q 75.5PQ 6 6.6 fl oz/1000 ft2 52.5ijk 3.5j-m 136.3q-A 7 8 9 3.3 fl oz/1000 ft2 6.6 fl oz/1000 ft2 6.6 fl oz/1000 ft2 62.5ghi 3.0lmn 123.8x-F 10.0r-y 5.8b-f 181.0bc 4.8u-y 6.5bc 189.5 10 Trilogy 5.57 fl oz/1000 ft2 25.0m-s 4.5g-j 159.8d-o 11 0.94 fl oz/1000 ft2 85.0-e 1.5pq 101.3G-N 12 1.89 fl oz/1000 ft2 63.8ghi 3.3klm 122.0y-G 13 14 15 16 23 0.94 fl oz/1000 ft2 0.544 fl oz/1000 ft2 1.89 fl oz/1000 ft2 1.09 fl oz/1000 ft2 0.94 fl oz/1000 ft2 0.82 fl oz/1000 ft2 1.89 fl oz/1000 ft2 1.64 fl oz/1000 ft2 1.89 fl oz/1000 ft2 52.5ijk 3.5j-m 130.3u-D 6.3t-y 6.0-e 177.5-e 28.8l-q 4.8f-i 145.3m-w 4.0 v-y 6.8 b 176.0 -f 22.5 n-u 4.8 f-i 146.8 l-w 25 1.89 fl oz/1000 ft2 / 25.0 m-s 4.8 f-i 156.3 f-q tretments pplied on Oct 12, 2017 nd lte tretments pplied on Nov 6, 2017 b Men percent disesed re ssessed on Apr 30, 2018. c Qulity ws visully ssessed where 1 = ded, 6 = cceptble, 9 = drk green. d Color ws ssessed using FieldScout CM1000 Chlorophyll Meter from Spectrum Technologies, Inc.
Applictio 26 27 28 29 30 31 Secure Concert II Concert II 8.3 fl oz/1000 ft2 10.0r-y 5.5c-g 163.5b-n 6.0t-y 6.3-d 172.0-i 7.5s-y 6.0-e 163.5b-n 6.8t-y 6.3-d 174.5-g 4.3v-y 6.5bc 180.8-d 1.0xy 7.0 168.0b-k 32 Instrt 7.0 fl oz/1000 ft2 82.5-f 2.0n-q 97.8I-O 33 34 35 36 37 38 39 40 41 42 Instrt Nivles T Echo Dyd ETQ Nivles T E-Pro ETQ Nivles E-Scpe ETQ Mxtim Dconil Ultrex 7.0 fl oz/1000 ft2 3.0 fl oz/1000 ft2 3.0 fl oz/1000 ft2 6.0 fl oz/1000 ft2 3.0 fl oz/1000 ft2 1.5 fl oz/1000 ft2 6.5 fl oz/1000 ft2 1.5 fl oz/1000 ft2 9.0 fl oz/1000 ft2 4.7 fl oz/1000 ft2 0.6 fl oz/1000 ft2 3.0wxy 7.0 180.5-d 65.0f-i 2.5m-p 108.5E-L 0.5y 7.0 173.3-h 4.3v-y 6.5bc 166.8b-l 40.0j-n 4.0i-l 151.3i-u 2.3wxy 6.8b 184.0b 41.3j-m 4.0 i-l 134.5 r-b 13.8 q-y 5.3 d-h 155.8 f-q 33.8 l-p 4.3 h-k 142.5 n-y 1.5 xy 7.0 172.0 -i tretments pplied on Oct 12, 2017 nd lte tretments pplied on Nov 6, 2017 c Qulity ws visully ssessed where 1 = ded, 6 = cceptble, 9 = drk green. d Color ws ssessed using FieldScout CM1000 Chlorophyll Meter from Spectrum Technologies, Inc.
Appliction 43 Trinity Dconil Ultrex 3.8v-y 6.5bc 162.3c-n 44 Nvicon 0.85 fl oz/1000 ft2 67.5e-i 3.0lmn 113.3C-J 45 Fme T 0.67 fl oz/1000 ft2 11.8q-y 5.5c-g 153.8g-s 46 Fme C 5.9 fl oz/1000 ft2 37.5k-o 4.3h-k 142.5n-y 47 Fme 0.27 fl oz/1000 ft2 Bnner MAXX 1.4 fl oz/1000 ft2 20.0o-w 5.0e-i 140.8o-z 48 Fme Bnner MAXX 1.9 fl oz/1000 ft2 15.0q-y 5.3d-h 150.3j-v 49 Fme 0.27 fl oz/1000 ft2 0.78 fl oz/1000 ft2 8.8r-y 6.0-e 171.0-j 50 A21664A A17856B 0.8 fl oz/1000 ft2 37.5k-o 4.0i-l 144.8n-x 51 A21664A A17856B 0.8 fl oz/1000 ft2 6.8t-y 6.3-d 179.5-d 52 A15457K A17856B 0.236 fl oz/1000 ft2 8.5r-y 6.0-e 169.8-j 53 Instrt 1 26.3l-r 4.8f-i 136.3q-A 54 10.0r-y 5.8b-f 181.3bc 55 85.0-e 1.8opq 121.8y-H A15457K 0.24 fl oz/1000 ft2 56 5.5u-y 6.3 -d 180.5 -d 57 6.0 fl oz/1000 ft2 4.8 u-y 6.5 bc 182.0 bc 58 16.3 p-y 5.3 d-h 170.0 -j tretments pplied on Oct 12, 2017 nd lte tretments pplied on Nov 6, 2017 c Qulity ws visully ssessed where 1 = ded, 6 = cceptble, 9 = drk green. d Color ws ssessed using FieldScout CM1000 Chlorophyll Meter from Spectrum Technologies, Inc.
Appliction 59 60 Bnner MAXX 33.8l-p 4.3h-k 150.3j-v 40.0j-n 4.0i-l 140.0o-z 61 AND12147 6.67 lbs/1000 ft2 21.3o-v 5.0e-i 132.3t-C 62 Anderson s 3-Wy G 4.24 lbs/1000 ft2-2 Apps 57.5hij 3.5j-m 147.8k-w 63 Anderson s 3-Wy G 6.66 lbs/1000 ft2 71.3c-h 2.5m-p 117.3A-I 64 65 66 67 68 Trction 26/36 Trction 26/36 Trction Spirto Pinpoint Tourney Pinpoint Tourney Dconil Ultrex 1.3 fl oz/1000 ft2 4.0 oz/1000 ft2 1.3 fl oz/1000 ft2 8.0 oz/1000 ft2 1.3 fl oz/1000 ft2 0.31 fl oz/1000 ft2 0.44 oz/1000 ft2 0.31 fl oz/1000 ft2 0.44 fl oz/1000 ft2 5 oz/1000 ft2 13.8q-y 5.3d-h 163.5b-n 11.3q-y 5.5c-g 169.3-j 80.0b-g 2.0n-q 91.0K-Q 82.5-f 2.0n-q 100.8H-N 53.8h-k 3.5j-m 129.0w-E 69 70.0d-i 2.8mno 110.3D-K 70 Propiconzole 14.3% 6.5 fl oz/1000 ft2 55.0h-k 3.3klm 102.0G-M 71 Chlorothlonil 720F 95.0b 1.0q 78.8OPQ 72 QP PPZ/Fludi 4.4 fl oz/1000 ft2 10.5r-y 5.5c-g 133.0s-C 73 74 75 76 Propiconzole 14.3% 6.5 fl oz/1000 ft2 Chlorothlonil 720F Chlorothlonil 720F Propiconzole 14.3% 6.5 fl oz/1000 ft2 Chlorothlonil 720F Propiconzole 14.3% 6.5 fl oz/1000 ft2 18.8p-x 5.0e-i 145.5m-w 80.0 b-g 2.5 m-p 104.0 F-M 26.3 l-r 4.5 g-j 138.3 p-a 18.8 p-x 5.0 e-i 151.3 i-u 77 Intglio 1 62.5 ghi 3.3 klm 107.3 F-M 78 88.8 bc 1.3 q 94.0 J-P 79 Secure 92.5 b 1.0 q 88.8 L-Q 80 Velist 96.8 b 1.0 q 80.3 N-Q tretments pplied on Oct 12, 2017 nd lte tretments pplied on Nov 6, 2017 c Qulity ws visully ssessed where 1 = ded, 6 = cceptble, 9 = drk green. d Color ws ssessed using FieldScout CM1000 Chlorophyll Meter from Spectrum Technologies, Inc.
Appliction 82 83 Propiconzole 14.3% Iprodione Chlorothlonil 82.5% Iprodione Chlorothlonil 82.5% Propiconzole 14.3% 8.5 fl oz/1000 ft2 17.0 fl oz/1000 ft2 8.5 fl oz/1000 ft2 17.0 fl oz/1000 ft2 26.3l-r 4.8f-i 130.0v-D 43.8jkl 4.0i-l 120.8z-H LSD P=.05 17.78 1.01 21.19 tretments pplied on Oct 12, 2017 nd lte tretments pplied on Nov 6, 2017 c Qulity ws visully ssessed where 1 = ded, 6 = cceptble, 9 = drk green. d Color ws ssessed using FieldScout CM1000 Chlorophyll Meter from Spectrum Technologies, Inc.