Interference and Control of Large Crabgrass (Digitaria sanguinalis) and Southern Sandbur (Cenchrus echinatus) in Forage Bermudagrass (Cynodon dactylon)

Walker, Robert H.; Wehtje, Glenn; Richburg, John S.

doi:10.1017/s0890037x00044584

Cited by 11 publications

(8 citation statements)

References 8 publications

(8 reference statements)

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“…Atrazine applied at seeding did not affect centipedegrass ground cover in the absence of large crabgrass. Similar to our results, Walker et al (1998) reported that bermudagrass forage production was reduced between 59 and 67% when established in the presence of large crabgrass and when no weed control was applied as compared with a monoculture of bermudagrass. These data indicate that the use of atrazine at seeding can hasten the establishment of centi-Volume 18, Issue 3 (July-September) 2004 Table 4.…”

Section: Herbicides and Pgrs Applied Early Postemergencesupporting

confidence: 91%

Establishment of Seeded Centipedegrass (Eremochloa ophiuroides) in Utility Turf Areas

et al. 2004

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Experiments were conducted to evaluate safety and effectiveness of herbicides during establishment of seeded centipedegrass. Centipedegrass tolerance to herbicides was evaluated at seeding and early postemergence. Imazapic at 105 g ai/ha, sulfometuron at 53 g ai/ha, or metsulfuron at 21 or 42 g ai/ha applied at seeding reduced centipedegrass ground cover compared with the nontreated. Imazapic at 18 or 35 g/ha or applications of atrazine or simazine at seeding did not reduce centipedegrass ground cover compared with the nontreated. Applications of chlorsulfuron plus mefluidide (7 + 140 g ai/ha) or metsulfuron at 21 or 42 g/ha applied 6 wk after seeding (WAS) centipedegrass (one-leaf to one-tiller growth stage) caused 20, 16, and 83% phytotoxicity, respectively, 56 d after treatment (DAT). Imazapic, sulfometuron, atrazine, or simazine applied 6 WAS caused <15% phytotoxicity 56 DAT. When large crabgrass and centipedegrass were seeded together, large crabgrass emergence was reduced 41% when atrazine (1,100 g ai/ha) was applied at seeding. Centipedegrass tiller production was reduced with increasing amounts of crabgrass. However, centipedegrass tiller production and ground cover were higher when atrazine was applied because of reduced interspecific interference from large crabgrass. These data indicate that centipedegrass can be established more quickly if appropriate herbicides are used at seeding or shortly after seeding.

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Section: Herbicides and Pgrs Applied Early Postemergencesupporting

confidence: 91%

Establishment of Seeded Centipedegrass (Eremochloa ophiuroides) in Utility Turf Areas

et al. 2004

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“…Among these are WSSA Group 4's 2,4-D, aminopyralid, clopyralid, dicamba, fluroxypyr, and triclopyr, and the Group 2 acetolactate synthase inhibitors chlorosulfuron, halosulfuron, imazapic, metsulfuron, nicosulfuron, and sulfosulfuron (McCullough 2018). Multiple herbicides are registered for bermudagrass forage production, but many have been shown to cause injury (Bhowmik and Bingham 1990;Butler and Muir 2006;Walker et al 1998). The production of a perennial forage crop, utilizing the same herbicides over several years, can result in weed resistance (McCullough et al 2013;Simmons 2017).…”

Section: Introductionmentioning

confidence: 99%

Bermudagrass tolerance of indaziflam PRE applications in forage production

et al. 2019

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Bermudagrass is a major forage species throughout Georgia and the Southeast. An essential part of achieving high-yielding, top-quality forages is proper weed control. Indaziflam is a residual herbicide that controls many broadleaf and grass species by inhibiting cellulose biosynthesis. Research conducted in Tift and Colquitt counties in Georgia determined optimal PRE rates for indaziflam for bermudagrass forage production. Treatments applied at spring greenup of established ‘Alicia’ bermudagrass included indaziflam at 47, 77, 155, or 234 g ai ha−1 PRE, pendimethalin at 4,480 g ha−1 PRE, a split application of indaziflam at 47 g ha−1 PRE followed by the same rate applied POST after the first cutting, and a nontreated control (seven treatments in all). Forages were machine harvested three times each year for each location beginning at least 47 d after treatment (DAT), with final cuttings up to 168 DAT. For all treatments, fresh- and dry-weight yields at each harvest and totals for the season did not differ from the nontreated control. Indaziflam at 155 and 234 g ha−1 did cause minor stunting at 44 DAT, but this was transient and not observed at the second harvest. Indaziflam applied PRE has the potential to provide residual control of troublesome weeds in bermudagrass forage and hay production, with ephemeral stunting at the recommended application rates.

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“…Large crabgrass, one of the worst weeds in arid agricultural areas, has been reported as a weed infecting 33 crops and turfgrass in fifty-six countries [2], [3], throughout tropical and temperate regions of the world [4], [5]. Use of chemical herbicide is the major strategy for crabgrass control in most crops at present, however, intensive and repeated use of chemicals over several decades has led to the evolution of herbicide-resistant crabgrass [6], [7] and environmental pollution, therefore, biological control, if available, would be a preferable alternative for its control.…”

Section: Introductionmentioning

confidence: 99%

Differential Gene Expression for Curvularia eragrostidis Pathogenic Incidence in Crabgrass (Digitaria sanguinalis) Revealed by cDNA-AFLP Analysis

et al. 2013

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Gene expression profiles of Digitaria sanguinalis infected by Curvularia eragrostidis strain QZ-2000 at two concentrations of conidia and two dew durations were analyzed by cDNA amplified fragment length polymorphisms (cDNA-AFLP). Inoculum strength was more determinant of gene expression than dew duration. A total of 256 primer combinations were used for selective amplification and 1214 transcript-derived fragments (TDFs) were selected for their differential expression. Of these, 518 up-regulated differentially expressed TDFs were identified. Forty-six differential cDNA fragments were chosen to be cloned and 35 of them were successfully cloned and sequenced, of which 25 were homologous to genes of known function according to the GenBank database. Only 6 genes were up-regulated in Curvularia eragrostidis-inoculated D. sanguinalis, with functions involved in signal transduction, energy metabolism, cell growth and development, stress responses, abscisic acid biosynthesis and response. It appears that a few pathways may be important parts of the pathogenic strategy of C. eragrostidis strain QZ-2000 on D. sanguinalis. Our study provides the fundamentals to further study the pathogenic mechanism, screen for optimal C. eragrostidis strains as potential mycoherbicide and apply this product to control D. sanguinalis.

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Interference and Control of Large Crabgrass (Digitaria sanguinalis) and Southern Sandbur (Cenchrus echinatus) in Forage Bermudagrass (Cynodon dactylon)

Cited by 11 publications

References 8 publications

Establishment of Seeded Centipedegrass (Eremochloa ophiuroides) in Utility Turf Areas

Establishment of Seeded Centipedegrass (Eremochloa ophiuroides) in Utility Turf Areas

Bermudagrass tolerance of indaziflam PRE applications in forage production

Differential Gene Expression for Curvularia eragrostidis Pathogenic Incidence in Crabgrass (Digitaria sanguinalis) Revealed by cDNA-AFLP Analysis

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