New SDHI Fungicides: Outlook for Cherry Disease Control in 2012
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1 New SDHI Fungicides: Outlook for Cherry Disease Control in 2012 NW O&V Show; January 24, 2012 George W. Sundin
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3 Fungal Disease Epidemics % Disease Date Harvest Sept. Oct.
4 Fungal Disease Epidemics % Disease Date Harvest Sept. Oct.
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6 The vital role of respiration a target for newer fungicides and pesticides complex III Qi (inside) inhibitors like cyazofamid (Ranman) complex III Qo (outside) inhibitors like Famoxate, strobilurins, Group 11 complex V inhibitors like trialkyltins complex I inhibitors like fenaminosulf (Dexon), rotenone insecticide complex II inhibitors like penthiopyrad, boscalid, Group 7 complex IV inhibitors like cyanide, nitric oxide electron transport inhibitors oxidative phosphorylation inhibitors
7 Commercial succinate dehydrogenase (SDHI) Fungicides Boscalid a.i. of fungicide Endura Tree fruit sold in a premix with pyraclostrobin (PRISTINE) To be registered in 2012: Fluopyram -- Luna Fluxapyroxad -- Merivon Penthiopyrad -- Fontelis
8 Commercial SDHI Fungicides Boscalid a.i. of fungicide Endura Tree fruit sold in a premix with pyraclostrobin (PRISTINE) To be registered in 2012: Fluopyram Luna + QoI (Strobilurin); + DMI; or + AP Fluxapyroxad Xemium + QoI (Strobilurin) Penthiopyrad -- Fontelis
9 Commercial SDHI Fungicides for Cherry Boscalid a.i. of fungicide Endura Tree fruit sold in a premix with pyraclostrobin (PRISTINE) To be registered in 2012: Fluopyram Luna + QoI (trifloxystrobin) LUNA SENSATION Fluxapyroxad Xemium + QoI (pyraclostrobin) -- MERIVON Penthiopyrad -- Fontelis
10 Commercial SDHI Fungicides What you will hear about these fungicides: Luna Sensation and Merivon are premixes of 2 active ingredients for built in resistance management What you need to remember about these fungicides: Both of these fungicides are at risk of resistance development AND they have been used for CLS control in Michigan for several years
11 Fungal Disease Control Chemistries, 2012 Chlorothalonil Bravo and generics Pristine contains an SDHI component Strobilurins Gem, Adament Syllit Copper Captan Sterol-inhibitors SDHIs succinate dehydrogenase inhibitors
12 Fungal Disease Control Chemistries, 2011 New SDHI chemistries Luna Sensation (Bayer) stroby + SDHI Merivon (BASF) stroby + SDHI Fontelis (Dupont) Q8Y78 (Dupont) stroby + SDHI
13 Cherry Disease Control Experimental Trials Trials run at NWMHRS Bill Klein, Myron Anderson Montmorency & Balaton; Montmorency 16 treatments; 8 treatments Petal fall, shuck split, 1st - 4th covers Ratings on July 15, August 25
14 Penthiopyrad Efficacy Leaf Spot Year Nontreated Control Penthiopyrad 14 fl oz/a 20 fl oz/a a 76.6 b 45.9 c a 59.9 b 35.7 c a 16.9 b 11.4 c a 72.7 b 76.4 b a 41.1 b 45.4 b Late August, early September defoliation
15 Penthiopyrad Efficacy Leaf Spot Year Nontreated Control Penthiopyrad 14 fl oz/a 20 fl oz/a Dodine a 76.6 b 45.9 c 32.6 d a 59.9 b 35.7 c a 16.9 b 11.4 c a 72.7 b 76.4 b a 41.1 b 45.4 b 1.9 de 4.5 e Late August, early September defoliation
16 Fluopyram Efficacy Leaf Spot (Evaluated using a premix with Year trifloxystrobin) Nontreated Control Fluo + tri Pristine 14 fl oz/a 10.5 oz/a 2008 fs 47.2 a 0.8 e 2.6 de 2009 p 91.0 a 17.1 d 19.4 d 2011 p 58.5 a 8.9 c 9.0 c 2 chlorothalonils; 4 cover sprays of test chemistries Late August, early September defoliation
17 Leaf Spot Control, Highlights % Defoliation, Aug 25 Pristine, 12 oz Bravo (AB); Gem, 3 fl oz (CDEF) Bravo (AB); Luna Sensation 5 fl oz (CDEF) Control 4.5 g 7.2 g 8.9 g 58.5 ab
18 Leaf Spot Control, Highlights % Defoliation, Aug 25 Fontelis, 14 fl oz Fontelis, 20 fl oz Q8Y78, 18 fl oz Pristine, 12 oz Control 41.1 def 45.4 cde 32.1 f 4.5 g 58.5 ab Q8Y78 stroby + Fontelis
19 Leaf Spot Control, Highlights Defoliation, Aug 25
20 Leaf Spot Control Pristine (2010) % Leaf Spot Defoliation EF Pristine, 12 oz Equus, 52.7 fl oz AB Pristine, 10.5 oz CF Syllit, 24 fl oz DE EF F A F Equus, 52.7 fl oz AB Syllit, 24 fl oz CDEF Control Aug 24 rating July 27 rating
21 News and Notes; Cherry Disease Control Level of leaf spot infection on July 15 was similar on Merivon, Pristine, Gem treatments in this block However, level of infection did not increase in Merivon treatments between July 15 and Aug 25 Infection increased and defoliation did as well in Gem and Pristine treatments in this block
22 Brown Rot Control, Sweet Cherry Ulster Highlights Trees inoculated; one branch in each quadrant Two sprays, July 1 and July 8 Rating on July fruit per tree
23 Brown Rot Control, Sweet Cherry Emperor Francis Highlights Trees inoculated; one branch in each quadrant Two sprays, July 1 and July 8 Rating on August fruit per tree
24 Powdery Mildew Control, Highlights Pristine, 12 oz Equus (AB); Syllit, 24 fl oz (CDEF) Equus (AB); Captan (CDEF) Control 0.9 f 18.1 bc 26.5 a 19.1 b
25 Powdery Mildew Control, Highlights Equus (AB); Syllit, 24 fl oz (CDEF) Equus (AB); Pristine (CF) Syllit, 24 fl oz (DE) Control 18.1 bc 1.9 ef 19.1 b
26 Powdery Mildew Control, Highlights 100 A % Powdery Mildew Infection I HI HI HI GHI FGH C 0 Syllit (27 fl oz) Control Aug 11 rating Program treatments with Luna, Fontelis, Pristine, Gem
27 News and Notes; Cherry Leaf Spot Control New SDHIs Merivon and Luna Sensation; Fontelis Captan should be added for resistance management Syllit FL excellent leaf spot control; limiting defoliation Syllit + Captan recommended for resistance management Copper excellent leaf spot control; limiting defoliation (1.2 lbs metallic/a)
28 News and Notes; Brown Rot Control New SDHIs Merivon and Luna Sensation; Fontelis Will control brown rot Indar remains the best option
29 News and Notes; Cherry Leaf Spot Control Pristine and Gem tank mix with Captan Might be some shifting happening in MI orchards We are examining boscalid sensitivity this winter
30 Resistance status of B. jaapii: DMI resistance widespread QoI resistance not yet SDHI s of concern due to Pristine use
31 Summary SDHI s are coming out in 2012 Pristine has been used in apple and cherry Exposure of key pathogens has already occurred Efficacy: Apple scab G to VG Leaf spot VG to E Powdery mildew VG to E Amer brown rot G to VG
32 Tyre J. Proffer -- MSU Gail Ehret -- MSU Kim Lesniak MSU Cory Outwater -- MSU Nikki Rothwell -- NWMHRS Erin Lizotte NWMHRS Karen Powers -- NWMHRS Bill Klein NWMHRS Myron Anderson NWMHRS Michigan Cherry Committee
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