Distribution and efficacy of drip‐applied metam‐sodium against the survival of <i>Rhizoctonia solani</i> and yellow nutsedge in plastic‐mulched sandy soil beds

Candole, B. L.; Csinos, A. S.; Wang, Dong

doi:10.1002/ps.1363

Cited by 8 publications

(12 citation statements)

References 34 publications

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“…Another influence could be that the eastern portion of the production area has 80% of the potato production (USDA-NASS, 2008) in their rotation which is produced on ground frequently fumigated with metam-sodium to control Verticillium. Metam-sodium will also influence other soil fungal populations including R. solani (Fravel & Lewis, 2004;Candole et al, 2007aCandole et al, , 2007b. These observations may prove helpful in guiding future research and management options.…”

Section: Discussionmentioning

confidence: 93%

Virulence, distribution and diversity ofRhizoctonia solanifrom sugar beet in Idaho and Oregon

Strausbaugh

Eujayl

Panella

et al. 2011

Canadian Journal of Plant Pathology

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Rhizoctonia root rot causes serious losses on sugar beet worldwide. In order to help explain why Rhizoctonia root rot management practices have not performed well in some areas of the Intermountain West (IMW), a survey was conducted. In the IMW from 2004 to 2006, 94 Rhizoctonia solani field isolates were collected from sugar beet roots. These field isolates were compared with 19 reference strains and 46 accessions from GenBank for genetic diversity based on sequencing of the ITS-5.8S rDNA region. Greenhouse pathogenicity tests on sugar beet and silage corn were conducted and plant damage was assessed using a randomized complete block design with at least four replications. The majority of the isolates had sequence identity with the AG-2-2 IIIB (47%) or AG-4 subgroups (44%). Most of the AG-2-2 isolates (87%) were associated with fields in the western portion of the production area, while 71% of the AG-4 isolates came from the eastern portion of the production area. Isolates from AG-2-2 IIIB were frequently more virulent on sugar beet and sequence of the ITS-5.8s region required cloning because of genetic diversity within isolates. Seven (all AG-2-2 IIIB) of 18 isolates tested could attack both sugar beet and corn, while two of the seven virulent isolates caused less root rot on corn. To reduce Rhizoctonia root rot on sugar beet and corn, crop rotations and the isolates utilized for selecting host resistance could be given further consideration.Résumé: Le rhizoctone brun cause de graves pertes chez la betterave à sucre partout dans le monde. Afin d'expliquer pourquoi les pratiques de gestion du rhizoctone brun n'ont pas été très efficaces dans certaines des régions de l'Intermountain West (IMW) américain, une étude a été menée. Dans l'IMW, de 2004 à 2006, 94 isolats de Rhizoctonia solaniont été collectés, en champs, sur des racines de betteraves à sucre. Ces isolats ont été comparés à 19 souches de référence et à 46 obtentions de la GenBank afin d'en établir la diversité génétique basée sur le séquençage de la région de l'ITS-5.8S de l'ADNr. Des tests de pathogénicité ont été effectués en serre sur des betteraves à sucre et sur du maïs à ensilage. Le dommage subi par les plants a été évalué au moyen d'un dispositif en blocs randomisés avec au moins quatre réplications. La majorité des isolats possédait une identité de séquence avec les sous-groupes AG-2-2 IIIB (47 %) ou AG-4 (44 %). La plupart des isolats d'AG-2-2 (87 %) étaient associés à des champs de la partie occidentale de la région de production, tandis que 71 % des isolats d'AG-4 provenaient de la portion orientale. Les isolats d'AG-2-2 IIIB étaient très souvent plus virulents à l'égard de la betterave à sucre et la séquence de la région de l'ITS-5.8s a dû être clonée à cause de la diversité génétique trouvée chez les isolats. Sept (tous d'AG-2-2 IIIB) des 18 isolats testés pouvaient attaquer et la betterave à sucre et le maïs, tandis que deux des sept isolats virulents ont causé moins de pourridié sur le maïs. Il faudrait davantage porter attention aux rota...

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Section: Discussionmentioning

confidence: 93%

Virulence, distribution and diversity ofRhizoctonia solanifrom sugar beet in Idaho and Oregon

Strausbaugh

Eujayl

Panella

et al. 2011

Canadian Journal of Plant Pathology

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“…This observation was likely due to POST herbicide treatments in the greenhouse being applied over-the-top, whereas in field studies, the POST treatments were directed. Candole et al (2007) showed that one complication with dripapplied herbicides is distribution across the raised bed. These field studies included two drip tapes in the planting bed to increase application of herbicide treatment across the raised bed.…”

Section: Resultsmentioning

confidence: 98%

Tolerance of Bell Pepper to Herbicides Applied through a Drip Irrigation System

2016

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Drip irrigation is installed under polyethylene mulch to supply irrigation and nutrients to vegetables grown in plasticulture. This irrigation system also provides an alternative method for application of herbicides into the plant bed for control of yellow and purple nutsedge. Greenhouse and field studies were conducted to determine bell pepper tolerance to halosulfuron, imazosulfuron, and trifloxysulfuron applied POST (over the top of pepper in greenhouse study, POST-directed in the field study) or soil applied (applied by hand with water in greenhouse study or through drip irrigation in the field study). In greenhouse studies, pepper injury from halosulfuron, imazosulfuron, and trifloxysulfuron applied POST was similar at 14 and 21 d after treatment (DAT; 21 to 35% and 54 to 60%, respectively). Halosulfuron, imazosulfuron, and trifloxysulfuron soil applied in greenhouse studies caused 6 to 8% and 13 to 20% injury to pepper at 14 and 21 DAT, respectively. Pepper injury in greenhouse studies increased as rate of halosulfuron, imazosulfuron, and trifloxysulfuron increased regardless of application method (soil or POST applied). Dry pepper weight at 28 DAT followed an inverse linear response to increasing rates of halosulfuron, imazosulfuron, and trifloxysulfuron. In field studies, bell pepper height among herbicide treatments ranged from 32 to 37 cm at 14 DAT and was not different from the nontreated check (36 cm). Number one grade (7.8 to 14.7 MT ha−1) and fancy grade (2.1 to 2.8 MT ha−1) pepper fruit yield was not different in herbicide-treated pepper compared with yield of pepper in the nontreated check (10.0 to 26.6 MT ha−1, respectively). Based on these studies, pepper has excellent crop tolerance to halosulfuron, imazosulfuron, and trifloxysulfuron applied through drip irrigation or POST-directed but is not tolerant to POST applications.

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“…Variability in pest control when using Met‐Na is believed to result from inadequate distribution of MITC within the soil profile, especially for sandy soils (Nelson et al, 2004; Candole et al, 2007). A better understanding of how Met‐Na moves in the soil water phase when applied by drip irrigation lines is necessary to predict MITC distribution within the soil bed at concentrations required to provide adequate pest control throughout the growing season.…”

Section: Discussionmentioning

confidence: 99%

Water and Methyl Isothiocyanate Distribution in Soil after Drip Fumigation

Nelson

Ajwa

Trout³

et al. 2013

J. Environ. Qual.

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Methyl isothiocyanate (MITC) generators, such as metam sodium (Met-Na), are used for soil fumigation of agricultural land. The ban on the fumigant methyl bromide has resulted in greater use of MITC generators. To understand the efficacy of MITC, it is necessary to assess its generation and disappearance kinetics when Met-Na is applied to soil. This study evaluated the movement of water and distribution and dissipation of MITC in soil after application of Met-Na through surface drip irrigation systems. The effects of varying water application volume (25, 50, and 75 mm) and rate (1.9, 5.0, and 7.5 L h m) were evaluated in a sandy loam soil. Good fumigant distribution within the sandy loam soil was observed under medium water application amount (50 mm) with slow to intermediate drip application rates (1.9-5.0 L h m). Low water application amount (25 mm) or high application rate (7.5 L h m) did not provide adequate MITC distribution throughout the soil bed width and rooting depth. Dissipation patterns of MITC in soil in all water application amounts and rates followed first-order kinetics, with a rate constant of 0.025 ± 0.004 h and a half-life of 27 ± 3 h. Simulated water distribution through the soil profile using HYDRUS 2D/3D fitted measured field data well, and the model accurately simulated MITC fumigant distribution in the soil.

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Distribution and efficacy of drip‐applied metam‐sodium against the survival of Rhizoctonia solani and yellow nutsedge in plastic‐mulched sandy soil beds

Cited by 8 publications

References 34 publications

Virulence, distribution and diversity ofRhizoctonia solanifrom sugar beet in Idaho and Oregon

Virulence, distribution and diversity ofRhizoctonia solanifrom sugar beet in Idaho and Oregon

Tolerance of Bell Pepper to Herbicides Applied through a Drip Irrigation System

Water and Methyl Isothiocyanate Distribution in Soil after Drip Fumigation

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