Increase in Incidence and Severity of Target Turfgrass Diseases by Certain Fungicides

Couch, Houston B.

doi:10.1094/pd-75-1064

Cited by 7 publications

(11 citation statements)

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“…갈색퍼짐병을 비롯한 토양전염성 병원균은 주로 태치층(thatch layer) 밑에 서식하므로 발병 이후에는 약제를 사용하여 효과적으로 방 제하기가 어렵기 때문에 주로 예방적인 농약의 살포가 실시 되고 있다 (Aoyagi et al, 1998;Park et al, 1998). 그러면서 병 예방 및 방제를 위해서 무기농약과 유기합성 농약의 사 용은 계속 증대되어 왔다 (Goodman and Burpee, 1991 (Couch and Smith, 1991).…”

Section: 갈색퍼짐병은 경종적 방법 살수 및 시비관리 화학적 방unclassified

Isolation and Selection of Antagonistic Microbes for Biological Control of Zoysiagrass Large Patch Disease

Ma¹,

Kwark²,

Lee

2013

Korean Journal of Horticultural Science and Technology

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Abstract.A large patch disease caused by Rhizoctonia solani AG2-2 (IV) is a serious problem in Korean lawngrass (Zoysia japonica) sites including golf courses and sports fields in Korea. Antagonistic microorganisms against R. solani AG2-2 (IV) were isolated from various forest and crop soil sources in Southern Korea. Among the 61 isolates, I-009, FRIN-001-1, and YPIN-022 strains showing dramatic inhibition of the mycelial growth of R. solani AG2-2 (IV) in the pairing culture were selected as the most potential antagonistic microorganisms for this study. Based on the 16s RNA sequence comparison, I-009 and FRIN-001-1 isolates were identified as Bacillus spp., while YPIN-022 isolate belongs to the genus Pseudomonas. The greater inhibition (clear) zone between two edges of the selected and pathogenic microbes ranged from 11 to 15 mm in three selections, but the others averaged to 7 mm out of 30 mm distance. In another antifungal test using culture filtrate, those three isolates represented a range of 51.7 to 63.5% suppression potential. The selected isolates also inhibited significantly the stem-segment colonization by R. solani AG2-2 (IV) in vivo test by 28.1%, 43.0%, and 23.7% when inoculated with I-009, FRIN-001-1, and YPIN-022, respectively. The highest antagonistic activity for the large patch disease was demonstrated by the isolate FRIN-001-1, which will be useful for developing a bio-pesticide against Rhizoctonia.

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Section: 갈색퍼짐병은 경종적 방법 살수 및 시비관리 화학적 방unclassified

Isolation and Selection of Antagonistic Microbes for Biological Control of Zoysiagrass Large Patch Disease

Ma¹,

Kwark²,

Lee

2013

Korean Journal of Horticultural Science and Technology

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“…Dollar spot severity increased or was similar to control plots of creeping bentgrass ( Agrostis stolonifera L.) or colonial bentgrass ( Agrostis capillaries L.) following multiple applications of azoxystrobin (24,27). Multiple applications of benzimidazoles were also reported to increase DSSv of cool‐season turfgrass (9) due to the development of resistance.…”

Section: Introductionmentioning

confidence: 99%

The Role of Biofungicides and Organic Fertilizer in the Management of Dollar Spot in Bermudagrass

Tomaso‐Peterson

Perry

2007

Applied Turfgrass Science

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Dollar spot (DS), caused by Sclerotinia homoeocarpa F. T. Bennett, is a foliar disease of warm‐ and cool‐season grasses and occurs frequently throughout the growing season. A three‐year study was conducted to evaluate the efficacy of biofungicides for controlling DS of bermudagrass [Cynodon dactylon (L.) Pers. var. dactylon × C. transvaalensis Burtt‐Davy]. The biofungicides evaluated in this study were EcoGuard, TurfShield, and Actinovate SP. A slow‐release organic fertilizer was applied in conjunction with biofungicide and conventional fungicide treatments in 2006. All biofungicide treatments significantly reduced dollar spot severity (DSSv) in the spring of 2004. However, treatments were similar to the untreated control in 2005. Dollar spot severity was significantly reduced in plots that received organic fertilizer plus biofungicides applied at intervals of 14 days or greater in 2006. In 2004 and 2006, significant reductions in DSSv were observed when EcoGuard and TurfShield were alternated with conventional fungicides. The results of the three‐year study indicate EcoGuard, TurfShield, and Actinovate SP applied alone or alternated with conventional fungicides or in conjunction with slow‐release organic fertilizer are effective for controlling DS.

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“…Several cultural practices have been developed to manage dollar spot. These include minimizing drought stress (McDonald et al, 2006), frequent mowing to remove necrotic leaf tissue (Couch and Smith, 1991), and dew and guttation water removal in the early morning by mowing, rolling, or dragging a garden hose across the turf canopy (Couch, 2000). Proper nitrogen (N) management has been reported to improve dollar spot control.…”

mentioning

confidence: 99%

“…Overdependence on synthetic fungicides has resulted in selections of resistant S. homoeocarpa populations. Since the earliest report in the 1960s (Cole et al, 1968; Warren et al, 1974), populations of S. homoeocarpa have developed resistance to almost all of the fungicides used on turf, including benzimidazole and cadmium fungicides (Burpee, 1997; Couch and Smith, 1991; Warren et al, 1974) and dicarboximides and demethylation inhibitor fungicides (Bishop et al, 2008; Detweiler et al, 1983; Detweiler and Vargas, 1982; Golembiewski et al, 1995; Jo et al, 2006). Cross‐ and multiple resistance to more than one chemical family has also been reported (Golembiewski et al, 1995; Vargas et al, 1992).…”

mentioning

confidence: 99%

“…Benn., is a widely distributed disease affecting most turfgrass species in North America (Walsh et al, 1999). Peak development of dollar spot on cool-season turfgrasses occurs during late spring to early summer and again in late summer to early fall (Couch, 2000). Disease symptoms include bleached leaf blades with the edge of lesions outlined in red/brown coloration and strawcolored turf patches the size of a silver dollar coin.…”

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confidence: 99%

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Effect of Oriental Mustard (Brassica juncea) Seed Meal for Control of Dollar Spot on Creeping Bentgrass (Agrostis stolonifera) Turf

Pan

Earlywine

Smeda

et al. 2017

Intl Turfgrass Soc Res J

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This research evaluated oriental mustard [Brassica juncea (L.) Czern.] seed meal (MSM) for safety and efficacy in control of dollar spot (Sclerotinia homoeocarpa F.T. Benn.) in vitro and on creeping bentgrass (Agrostis stolonifera L.) turf. As a plant residual, MSM is the seed fraction that remains after seeds are crushed and oil is removed. The meal contains both nitrogen and secondary compounds termed glucosinolates. When moist, glucosinolates convert to fungicidal isothiocyanates. The in vitro study determined that MSM at higher rates completely suppressed S. homoeocarpa mycelial growth. A field study was conducted for 2 yr with three sequential applications of MSM at seven rates ranging from 0 to 1680 kg ha−1, in addition to the fungicide iprodione at 3.1 kg a.i. ha−1. In 2007, the severity of dollar spot infections varied among MSM treatments, with greater rates reducing dollar spot up to 82% compared with untreated control. In 2008, MSM at 1680 kg ha−1 reduced dollar spot by 60% or greater 8 to 14 wk after initial application (WAIA). After application of MSM at 1120 kg ha−1 or greater, the color of creeping bentgrass color was reduced 1 point on a 1 to 9 scale, but this reduction in color only lasted for 2 wk, and turf color in treated plots increased significantly by 6 WAIA compared with the untreated plots. Collectively, our results suggest that MSM is an organic material that could be integrated into a dollar spot management program on turf for minimizing selection of pathogen resistance to fungicides.

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Increase in Incidence and Severity of Target Turfgrass Diseases by Certain Fungicides

Cited by 7 publications

References 0 publications

Isolation and Selection of Antagonistic Microbes for Biological Control of Zoysiagrass Large Patch Disease

Isolation and Selection of Antagonistic Microbes for Biological Control of Zoysiagrass Large Patch Disease

The Role of Biofungicides and Organic Fertilizer in the Management of Dollar Spot in Bermudagrass

Effect of Oriental Mustard (Brassica juncea) Seed Meal for Control of Dollar Spot on Creeping Bentgrass (Agrostis stolonifera) Turf

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