SAIN Invasive Plant Pests Resource Collection for: Weeping lovegrass
Species (scientific name): Eragrostis curvula
| Title: Effects of wiping herbicides on serrated tussock (Nassela trichotoma (Nees) Arech.) and African lovegrass (Eragrostis curvula (Shrad.) Nees). |
| Author: Campbell-M-H; Nicol-H-I. |
| Source: Plant-Protection-Quarterly. 1998; 13 (1) 36-38. |
| Source Type: Journal |
| Publication Date: 1998 |
| Abstract: Flupropanate (Frenock) and glyphosate were applied to serrated tussock (Nassella trichotoma (Nees) Arech.) by wiping at Tuena and Dalgety, New South Wales and flupropanate was applied to African lovegrass (Eragrostis curvula (Shrad.) Nees) by wiping at Dalgety in September 1995. Flupropanate was also applied to serrated tussock at Tuena by spraying. The rates applied by wiping were 1:10, 1:20 and 1:40 (herbicide:water) and were applied in one or two passes. The rates used for spraying flupropanate were 0.75 to 1.5 kg a.i. ha-1. Flupropanate applied by wiping killed from 99 to 100% of mature serrated tussocks in Experiment 3, near Dalgety, from the lowest rate (1:40, wiped once) to the highest (1:10, wiped twice). In Experiment 4, near Dalgety, the variation in percentage kill from lowest rate to highest was 70-99%. At Tuena the effects were inferior to those at Dalgety with variation from 40 to 92% kill for the lowest and highest rate respectively. The main reasons for the inferior result at Tuena were smaller plots, smaller tussocks and a faster speed of application. Flupropanate killed or damaged small unwiped serrated tussock, African lovegrass, cocksfoot, phalaris, and native grass plants near the base of mature tussocks. It appeared that flupropanate wiped onto leaves was washed to the soil by rain where it spread and affected grasses in close proximity to tussock bases. At Tuena, flupropanate applied as a spray on the same day as wiping gave 88-100% kills of serrated tussock from 0.75 to 1.5 kg a.i. ha-1. As the highest rate of glyphosate, 1:10, wiped twice, resulted in only 33% kill of serrated tussock at Tuena, higher rates will be necessary to obtain commercially acceptable results using this herbicide. Wiping as a method of herbicide application needs testing over large areas in the field to develop a reliable practical technique as free as possible from the variables inherent in the process. |
| Title: Establishment and persistence of palatable taxa of Eragrostis curvula complex in southern New South Wales. |
| Author: Johnston-W-H; Shoemark-V-F. |
| Source: Australian-Journal-of-Experimental-Agriculture. 1997; 37 (1) 55-65. |
| Source Type: Journal |
| Publication Date: 1997 |
| Abstract: Spring sowings in cultivated plots at Wagga Wagga in 1980 and 1982, and Cowra and Colinroobie in 1980 and 1981 examined the establishment and persistence of Eragrostis curvula (Schrad.) Nees complex cv. Consol and accession 4660, Cenchrus ciliaris L. cv. American and Phalaris aquatica L. cv. Sirocco. Cenchrus ciliaris was short-lived and not frost-hardy. Competition and dry conditions reduced establishment of all species, nevertheless E. curvula established reliably. In 1 experiment where conditions were not immediately favourable for germination, E. curvula demonstrated a capacity to delay establishment until conditions improved. Competition from cool-season plants reduced persistence, particularly in the first year and when conditions were dry. Surviving E. curvula plants were generally long lived. At Cowra, the density of E. curvula was enhanced by regular mowing, but mowing reduced the density of P. aquatica. Presence of Trifolium subterraneum L. reduced the density of E. curvula while P. aquatica was unaffected. A second experiment at Colinroobie, sown in October 1987 examined the effects of mowing and fertilizer application on establishment and persistence of E. curvula cv. Consol and accession 4660. Fertilizer increased competition by cool-season annual species, reducing establishment and persistence of E. curvula, while regular mowing improved its persistence. In an experiment sown at Wagga Wagga in October 1989, E. curvula cv. Consol establishment was very low ( lt 1 plant/m-2) in undisturbed annual pasture and in the absence of cultivation, herbicide (glyphosate at 530 g a.i./ha) and mowing with herbage removal provided the best conditions for establishment. |
| Title: Production and nitrogen cycling in an ecosystem of Eragrostis curvula in semiarid Argentina. II. Nitrogen content and transfers. |
| Author: Brevedan-R-E; Busso-C-A; Montani-T; Fernandez-O-A. |
| Source: Acta-Oecologica. 1996; 17 (3) 211-223. |
| Source Type: Journal |
| Publication Date: 1996 |
| Abstract: The major components of the nitrogen cycle were studied in an ecosystem of Eragrostis curvula (Schrad.) Nees, an extensively utilized forage grass in semiarid Argentina. We constructed an annual nitrogen budget for this ecosystem including data on plant, soil and atmosphere nitrogen concentration and pools, and estimates of nitrogen transfers between compartments. Most of the nitrogen in the plant-soil system was in the soil (annual average = 6400 kg ha-1 up to 1 m depth) since only 3.4% were in the plant at the time of maximum aboveground plant biomass. Roots of E. curvula contained most ( gt 83%) of the total plant nitrogen during the observation period. They appeared to be in a steady state since their annual nitrogen uptake (215.80 kg ha-1) was balanced by nitrogen looses through mortality (191.69 kg ha-1 yr-1) and decomposition (223.51 kg ha-1 yr-1). Root decomposition returned 95.5% of the total annual nitrogen input to the soil (231.54 kg ha-1). Annual circulation of nitrogen through the vegetation was a very small fraction (3.4%) of the total nitrogen content in the plant-soil system (annual average = 6536 kg ha-1). Nitrogen partitioning and transfers within this system are discussed in detail. |
| Title: Effect of spring burning on the production on an Eragrostis curvula pasture. |
| Author: Pieterse-P-A {a}; Van-Bosch-J; Rethman-N-F-G. |
| Source: Applied-Plant-Science. 1996; 10 (2) 60-64. |
| Source Type: Journal |
| Publication Date: 1996 |
| Abstract: The effect of spring burning on the production on an Eragrostis curvula pasture was evaluated in a trial conducted under dryland conditions and supplementary irrigation on the Hatfield Experimental Farm of the University of Pretoria. There were three main treatments consisting of (a) burning in spring, (b) clipping to ground level and removing all litter in spring, and (c) leaving the pasture undisturbed until the late-season growth (control). The subtreatments consisted of two forms of nitrogen fertilizers (Limestone Ammonium Nitrate (LAN) and Ammonium Nitrate Solution (ANS)) applied at two levels (50 and 100 kg N ha-1 a-1). In the first season, burning did not have a significant (P gt 0.05) effect on yield. In the second and third seasons, yield on the burned plots was significantly lower than on the control plots. In most instances, the effect on yield was only significant with the first harvest of the growing season. Results from this trial also demonstrated that season, through its effect on growing conditions during and after the burn, may play a major role in modifying the effect of burning. The clipping treatment had almost the same effect on yield as burning. There was no significant interaction between the main and fertilizer treatments. |
| Title: Competitive ability of two grass species: Anthephora pubescens and Eragrostis curvula: 2. Growth analysis. |
| Author: Mynhardt-Jennifer-E {a}; Van-Rooyen-M-V; Theron-G-K. |
| Source: South-African-Journal-of-Botany. 1994; 60 (5) 269-275. |
| Source Type: Journal |
| Publication Date: 1994 |
| Abstract: A replacement series evaluation of the degree of interspecific competition between Anthephora pubescens Nees and Eragrostis curvula (Schrad.) Nees indicated that the former was a poor and the latter a strong competitor. This paper examines the possible correlation between competitive ability and growth and morphological characteristics of these species. The higher leaf area index, leaf area duration, crop growth rate, larger number of lateral tillers and greater tuft height of E. curvula conferred a competitive advantage to that species. The order exhibited by the leaf area ratio and relative growth rate reversed the hierarchy of the replacement series, indicating a lack of correlation between these traits and competitive ability. |
| Title: Root biomass and growth dynamics of Eragrostis curvula (Schrad.) Nees.).Biomasa radical y la dinamica de su crecimiento en Eragrostis curvula (Schrad.) Nees. |
| Author: Montani,-T.; Delmastro,-S.E.; Fernandez,-O.A. |
| Source: STUD.-Eragrostis curvulaOL. 1989. vol. 6, pp. 79-96. |
| Source Type: Journal |
| Publication Date: 1989 |
| Abstract: The morphology and growth dynamics of Eragrostis curvula roots was studied using a belowground observation chamber located in the field. The changes in root growth activity occurred almost simultaneously in the whole soil profile. The greatest growth was recorded in spring and autumn, with relative rates of 0.8 to 2.4 mm/cm/day. Root biomass, obtained from soil core samples, was highly seasonal. A minimum of 6.327 kg/ha was recorded in spring and a maximum of 10347 kg/ha in autumn. Roots were separated into alive and dead, representing the former from 40 to 63% of the total root biomass. The factors affecting the root growth and biomass are discussed. The results given by the methodologies employed are compared. |
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