A Practical Guide to Turfgrass Fungicides

Latin, Richard

doi:10.1094/9780890544976

Cited by 37 publications

(67 citation statements)

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“…In this regard, Mueller and Bradley (2008) argued that the phenylamide group presents systemic properties, so when they penetrate the plant, they are transported systemically to the fruits and protects them against an infection by S. rolfsii . In the analysis of the fungicide effect, quintozene suppressed the incidence of the pathogen and registered lower fruit damage; the positive effect of quintozene was because it affects the integrity of the cell membrane and cell wall, as well as the mitochondria in the phytopathogenic fungi, which decreases the formation of infectious sclerotia and propagules (Latin, 2011). Likewise, the climate played an important role in reducing damages in the 2015 cycle, since the average registered rainfall was only 145 mm, during the growing cycle (June-October).…”

Section: Resultsmentioning

confidence: 99%

Diagnosis and Integrated Management of Fruit Rot in Cucurbita argyrosperma, Caused by Sclerotium rolfsii

et al. 2018

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Section: Resultsmentioning

confidence: 99%

Diagnosis and Integrated Management of Fruit Rot in Cucurbita argyrosperma, Caused by Sclerotium rolfsii

et al. 2018

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“…It is expected that this control method will continue to be employed by turf managers in the industry. However, consistent dependence on chemicals for turfgrass disease control potentially leads to decreased effectiveness and fungicide resistance (Latin, 2011). For such reasons, alternative control measures including cultivar selection and cultural management practices are recommended for a sustainable disease management program (Vargas, 1993; Couch, 1995; Latin, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Leaf spot, caused by Bipolaris cynodontis (Marignoni) Shoemaker, and dollar spot, caused by Sclerotinia homoeocarpa F.T. Bennett, are two diseases that affect UDB putting green turf (Couch, 1995; Taliaferro, 1995; Walsh et al, 1999; Couch, 2000; Smiley et al, 2005; Brecht et al, 2007; Andrae et al, 2009; Latin, 2011).…”

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confidence: 99%

“…Management programs for turfgrass diseases include the use of resistant turfgrass cultivars, cultural management practices, and chemical pesticide applications (Vargas, 1993; Couch, 1995; Latin, 2011). Host resistant cultivar selection has been demonstrated in many host‐pathogen interactions; however, the usefulness of this approach is dependent on the availability of host resistance to a particular disease (Couch, 1995; Brecht et al, 2007; Bonos and Weibel, 2008; Tomaso‐Peterson and Young, 2010; Watschke et al, 2013).…”

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Cultivar Selection, Cultural Management Practice, and Fungicide Application Influence Leaf Spot and Dollar Spot on Ultradwarf Bermudagrass

Vines

Allen

DuBien

et al. 2017

Crop Forage & Turfgrass Mgmt

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Core Ideas Ultradwarf bermudagrass cultivars show different susceptibility to foliar diseases. Cultural management practices have different effects on foliar diseases. Seasonal fungicide applications adequately controlled leaf spot and dollar spot. In the southern United States, putting greens are commonly grassed with an ultradwarf bermudagrass (UDB) [Cynodon dactylon (L.) Pers. × C. transvaalensis Burtt‐Davy] cultivar. However, these turfgrasses generate profuse amounts of thatch, which leads to increased pressure of diseases such as leaf spot, caused by Bipolaris cynodontis (Marignoni) Shoemaker, and dollar spot, caused by Sclerotinia homoeocarpa F.T. Bennett. This 2‐yr field study evaluated the effects of (i) cultivar selection (‘Champion’ and ‘MiniVerde’ UDB cultivars), (ii) cultural management practice (standard weekly applications of vertical mow [VM]; weekly applications of VM with once monthly substitutions of slice, spike, and scarify practices; and once monthly applications of slice, spike, and scarify practices alone), and (iii) fungicide application (application of fungicide and no application of fungicide) on leaf spot and dollar spot of UDB putting green turf. Leaf spot severity (LSS) was assessed by a visual estimation of percent symptomatic turf area (0–100%). Dollar spot incidence (DSI) was assessed as the number of dollar spot foci present. At most rating periods during active infection, MiniVerde had reduced LSS and DSI compared with Champion. Standard VM practices resulted in the greatest LSS and DSI. Once monthly substitutions of spike and scarify practices in weekly VM regimes reduced LSS and DSI compared with standard VM practices. The least LSS and DSI were observed with once monthly applications of alternative slice, spike, and scarify practices. Applications of fungicides reduced LSS and DSI compared with no application of fungicides.

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“…Strobilurin fungicides are broad‐spectrum disease control products that were first registered for turfgrass use in 1996 with the introduction of azoxystrobin (methyl (E)‐2‐{2[6‐(2‐cyanophenoxy)pyrimidin‐4‐yloxy]phenyl}‐3‐methoxyacrylate) (Bartlett et al, 2001). By 2015, the list of registered strobilurin fungicides has broadened to include trifloxystrobin (methyl (E)‐methoxyimino‐{(E)‐α‐[1‐(α,α,α‐trifluorom‐tolyl)ethylideneaminooxy]‐o‐tolyl}acetate), pyraclostrobin (methyl N‐{2‐[1‐(4‐chlorophenyl)‐1H‐pyrazol‐3‐yl]oxymethyl]phenyl}(Nmethoxy)carbamate), and fluoxastrobin {(1E)‐[2‐[[6‐(2‐Chlorophenoxy)‐5‐fluoro‐4‐pyrimidinyl]oxy]phenyl](5,6‐dihydro‐1,4,2‐dioxazin‐3‐yl)‐methanone}(Latin, 2011). These fungicides are often applied to creeping bentgrass in warm, humid environments to control diseases such as brown patch and anthracnose ( Colletotrichum cereale Manns sensu lato Crouch, Clarke, and Hillman; Wong et al, 2006).…”

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Plant Health Characteristics of Creeping Bentgrass Affected by Strobilurin Fungicide Applications and Turfgrass Diseases

et al. 2016

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Previous research has indicated that strobilurin fungicide applications may mitigate the effects of summer heat stress on creeping bentgrass (Agrostis stolonifera L.). Two multi‐year experiments were conducted in 2011 and 2012 to evaluate plant health characteristics following strobilurin fungicide applications to creeping bentgrass putting greens. In Exp. 1, pyraclostrobin, azoxystrobin, fluoxastrobin, or trifloxystrobin were integrated within a conventional summer fungicide program. In Exp. 2, repeated applications of strobilurin fungicides were evaluated in absence of visible foliar disease. To limit foliar disease, overspray applications of chlorothalonil (2,4,5,6‐tetrachloroisophthalonitrile) and iprodione [3‐(3,5‐dichlorophenyl)‐N‐isopropyl‐2,4‐dioxoimidazolidine‐1‐carboxamide] were applied over the experimental units. The plant health characteristics evaluated were visual quality, spectral reflectance, percent green cover, and root morphology. Disease incidence and severity was also quantified visually. In Exp. 1, the nontreated control was similar to strobilurin fungicide programs in all parameters in 2011. In 2012, strobilurin fungicide programs exhibited improved normalized difference vegetation index (NDVI), ratio vegetation index (RVI), turfgrass quality, and percent green cover compared to the nontreated control. Disease severity also increased in 2012 compared to 2011. In Exp. 2, repeated applications of strobilurin fungicides did not affect measured parameters compared to the nontreated control when foliar diseases were managed with fungicides chlorothalonil and iprodione. In these experiments, differences in NDVI, RVI, turfgrass quality, and percent green cover often coincided with differences in disease severity in our evaluations. Under the conditions of these studies, applications of strobilurin fungicides have limited effects on NDVI, RVI, turfgrass quality, and percent green cover in the absence of visible disease.

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A Practical Guide to Turfgrass Fungicides

Cited by 37 publications

References 0 publications

Diagnosis and Integrated Management of Fruit Rot in Cucurbita argyrosperma, Caused by Sclerotium rolfsii

Diagnosis and Integrated Management of Fruit Rot in Cucurbita argyrosperma, Caused by Sclerotium rolfsii

Cultivar Selection, Cultural Management Practice, and Fungicide Application Influence Leaf Spot and Dollar Spot on Ultradwarf Bermudagrass

Plant Health Characteristics of Creeping Bentgrass Affected by Strobilurin Fungicide Applications and Turfgrass Diseases

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