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Seed Production Of Plantain (Plantago Lanceolata L.), J S. Rowarth, M P. Rolston, W J. Archie

IGC Proceedings (1977-2023)

Seed development studies showed that seed maturity in plantain (Plantago lanceolata L,) occurred 6 weeks after anthesis; maximum seed yields were obtained 8 weeks after anthesis. This is consistent with the fact that seed heads take approximately 17 days to complete flowering. Fertiliser nitrogen increased plantain seed yield. Time of closing, timing of nitrogen application and different stand densities did not significantly affect seed yield, probably because plantain can adapt to and compensate for the treatments imposed.

Reproductive Initiation, Closing Dates, Nitrogen Requirements And Harvesting Of Smooth Brome Cv. Grasslands Tiki, J S. Rowarth, W J. Archie

IGC Proceedings (1977-2023)

Reproductive initiation, closing dates, nitrogen requirements and optimum harvest time were investigated for seed production of Grasslands Tiki smooth brome (Bromus inermis Leyss.) in the South Island of New Zealand. Reproductive initiation began in late June, spikelet initiation in mid-September and ear-emergence in mid­October. Seed yield was not affected detrimentally by mowing to 5 cm in mid-September but decreased 24% by mowing in mid-October. Seed yield tended to increase with increasing amounts of N. However, although the highest seed yields were achieved with 50 kg/ha of N in autumn plus I 00 or 150 kg/ha in spring, they did not …

Evaluation Of Non-Thermal Residue-Removal Equipment Used By Willamette Valley Seed Growers As A Substitute For Open-Field Burning, William C. Young Iii, David O. Chilcote, Thomas B. Silberstein

IGC Proceedings (1977-2023)

Recent legislation reducing open-field burning in Oregon has caused many grass seed producers to experiment with non-thermal residue management alternatives. On-farm test sites were selected to evaluate 4 post-harvest residue removal treatments common at 7 locations. Seed yield did not differ significantly when residue management treatments were applied to new stands of perennial ryegrass (Lolium perenne) and tall fescue (Festuca arundinacea) after harvest of the first seed crop. Control of weeds and volunteer crop seedlings was poorest where increased amounts of crop residue remained on the soil surface.

Sowing Rate And Row Spacing In Pure Stand Establishment Of Smooth Meadowgrass For Seed Production, Trygve S. Aamlid

IGC Proceedings (1977-2023)

Seed production of smooth meadow grass (Poa pratensis L.) cv. Lavang was compared at 3 sowing rates (2.5, 5.0 and l0.0 kg/ha) and at 2 row spacings (16.5 and :n cm), the wider used in conjunction with carbon banding. Results varied between fields according to temperature after planting and the weed content of the soil, but, on average, 5.0 kg/ha proved to be the optimal sowing rate. 33 cm row spacing and carbon banding caused a higher proportion of tillers to develop panicles and gave a higher seed yield with a better weed control in the first and third …

Role Of Galega Seed In Forage Production, H Raig

IGC Proceedings (1977-2023)

The effects of different soil types and seeding rates and row spacing on the yield of galega (Galega orientalis) have been determined in long-term trials. Over 10 years al the Estonian Research Institute of Agriculture, IO00-seed weight was 6.7-8.4 g. Ten-yenr average seed yield (kg/hn) was 241, 305 nnd 424 on soils of pH 5.6, 6.0 and 6,3, respectively. Seed yields of galega were about 6 times those of alfalfa in the soil at pH 6.3. Seeding rate and now spacing hnd little effect on seed yields. In south Sakhalin, galega was winter-hardy at - 47°C and survived drought …

Effect Of Paclobutrazol On Seed Yield In The Subtropical Grass Digitaria Eriantha, L Ramirez, J B. Hacker

IGC Proceedings (1977-2023)

Lodging of Digitaria erlantha can reduce seed yield of well-fertilised seed crops. This experiment was designed to assess the effect of the growth retardant paclobutrazol on seed production and its components in a spring crop of D. erialllha cv. Premier. Paclobutrazol decreased lodging, reduced tiller height and weight and tended to increase seed set, seed weight and seeds per panicle. However, it also tended to reduce panicle density. Treatment with 0.75 kg ai/ha applied at initial panicle emergence was optimal, increasing pure seed yield from 305 to 462 kg/ha. Paclobutrazol has potential for increasing seed yield in D. erantlta through …

Seed Shattering In Tall Fescue, Mario Falcinelli

IGC Proceedings (1977-2023)

Seed shattering in many commercial grass seed crops is a serious problem which makes seed harvesting difficult and which is often a major cause of high losses in seed yield. 2880 plants of tall fescue (Festuca arundinacea) belonging to 48 natural populations collected at sites scattered from northern (46° 10'N) to southern (39°05'N) Italy and 60 plants of the cultivar Fawn were grown in Perugia (Italy) as spaced plants. Al peak anthcsis, 5 panicles from each plant were randomly chosen and 40 days later they were evaluated for seed retention capability. Ten plants, belonging to 9 different populations, …

Achieving Potential Herbage Seed Yields In Species Of Temperate Regions, Franco Lorenzetti

IGC Proceedings (1977-2023)

The potential seed yield (PSY) of a crop is represented by the total number of ovules present at anthesis in a unit area and is very high for nil forage species. However, seed yield or the agricultural realised seed potential (ARSP) is very low especially if compared with major grain crops (e.g., 15% vs 40% of PSY, respectively). The need for obtaining primarily high yield of high quality forage indicates that seed yield should be increased by improving the efficiency of the reproductive system rather than increasing its size. Seed setting and development and seed shattering are the characters to …

Reviewer Acknowledgements, Randy Wykoff, Emily Wilson

Journal of Appalachian Health

We at the Journal of Appalachian Health would like to thank the multitude of reviewers who have volunteered their time, talents, and attention to the journal. Reviewers help us consider the rigor and quality of the submissions we receive, and their willingness to read material ahead of publication ensures we can bring timely research to our readers in Appalachia and further afield.

Impacts Of The Covid-19 Pandemic On Intimate Partner Violence And Child Maltreatment Services In Rural Northwest North Carolina, Elisabeth G. Galphin, Adam Hege, Amy Dellinger Page

Journal of Appalachian Health

The current study examined the impact of the COVID-19 pandemic on IPV and child maltreatment services in rural northwestern North Carolina. Qualitative interviews were conducted with eight professionals representing six service organizations across four counties. The findings highlighted challenges these agencies faced throughout the pandemic, new risks for the clients served, and positive outcomes. In addition, it has been a useful learning experience as public health and social service agencies learn to serve their communities more effectively moving forward. This is especially relevant for rural communities, as it has put public health preparedness at the forefront.

Assessing Chronic Pain Among Adults Diagnosed With Diabetes Residing In Rural Appalachia, Brittany L. Smalls, Adebola Adegboyega, Courtney Ortz, Ellen Combs, Md. Tofial Azam, Philip M. Westgate, Nancy Schoenberg

Journal of Appalachian Health

Introduction: Appalachian populations have some of the highest rates of overdose and comorbidity, all of which are considered risk factors for and contributors to chronic pain.

Purpose: The purpose of this study was to examine the associations of comorbidity, disability (physical limitations), and depression with chronic pain among a community-based sample of Appalachian adults living with diabetes.

Methods: This study used baseline data to conduct a secondary analysis of cross-sectional data (n=356). Data included sociodemographic, disability (physical limitations), chronic pain, and depression measures. These data were collected and analyzed from 2017–2019. Multiple logistic regression was used to investigate the association …

The Impact Of Primary Care Physician Capacity On Preventable Hospitalizations: Identifying Bright Spots In The Appalachian & Mississippi Delta Regions, Michael Topmiller, Peter J. Mallow, Hoon Byun, Mark Carrozza, Yalda Jabbarpour

Journal of Appalachian Health

Introduction: Several studies have documented that higher rates of primary care physicians are associated with lower rates of preventable hospitalizations. Counties with higher rates of preventable hospitalizations are found in the Appalachian and Mississippi (MS) Delta Regions.

Purpose: (1) To determine if the association of primary care capacity with preventable hospitalizations is different in the Appalachian and MS Delta regions compared to the rest of the U.S., and (2) to explore primary care capacity in counties with lower-than-expected preventable hospitalization rates.

Methods: This study modeled preventable hospitalizations with primary care physicians (PCP) per 100,000 (PCP capacity) while controlling for several …

Psychosocial Factors, Stress And Sleep Among Rural Appalachian Kentucky Residents With Type 2 Diabetes Mellitus, Blake Dipaola, Zoe Taylor, Eric Hennemann, Brittany L. Smalls, Philip M. Westgate, Nancy Schoenberg

Journal of Appalachian Health

Introduction: Rural Appalachian residents experience higher rates of most chronic diseases, including type 2 diabetes mellitus (T2DM). Stress and sleep deficiency also are common in the region.

Purpose: To better understand these associated health burdens, the relationship among these conditions and psychosocial factors—such as depressive symptoms, distress, empowerment, and social support—was examined among Appalachian residents with T2DM.

Methods: Using data collected from a community-based sample of Appalachian adults with T2DM, the study examined whether psychosocial factors were associated with perceived stress (Cohen Perceived Stress Scale) and self-reported sleep deficiency (Epworth Sleepiness Scale). Multilevel linear mixed effects regression modeling was used …

Nutrition Education Needs And Barriers Of Uninsured Clients Who Utilize Free Clinics In Western North Carolina, Manan Roy, Alisha Farris, Erin Loy, Lauren Sastre, Danielle L. Nunnery

Journal of Appalachian Health

Introduction: Many uninsured adults rely on free health clinics for prevention and treatment of chronic disease. Little is known about the nutrition education needs of adults served by free health clinics, especially those living in counties within the Western North Carolina Appalachian Mountain Region.

Methods: An in-person survey was distributed to 202 clients of two free health clinics in western North Carolina. Descriptive analyses were conducted to determine frequency distributions for food and physical activity practices, acceptable topics and strategies for nutrition education, and the acceptance and barriers for various modalities.

Results: Depending on the clinic, 49-58% of participants were …

Using Public Funeral And Obituary Listings To Identify Spikes In Excess Mortality In One Appalachian County, Allen Archer, Melissa White, Megan Quinn, Randy Wykoff

Journal of Appalachian Health

Introduction: Delays (10-22 months) in availability of official state and county-level mortality data could have significant public health consequences. The COVID-19 pandemic illuminated the need for health officials to access timely death data to identify unexpected increases in mortality in their communities.

Purpose: The purpose of this study is to determine if funeral home listings and/or newspaper obituaries could help identify excess mortality on the local level, prior to the availability of official death records.

Methods: To calculate excess mortality, four years (2017–2020) of data were collected from three sources: the state health department, online funeral home listings, and newspaper …

Aftermath: A Word To Appalachia Following Hurricane Helene, Emily Wilson

Journal of Appalachian Health

On September 27, 2024, Hurricane Helene caused massive and catastrophic flash flooding in the lower Appalachian Region, leveling towns and forever altering much of the landscape. This is an open letter to the people of Appalachia who were affected by the disaster that blindsided our region.

Stand Age And Closing Date Effects On Seed Yield Of Caucasian And Zigzag Clover Cultivars, G T. Daly, Jiwan Gurung, R J. Lucas

IGC Proceedings (1977-2023)

Seed yields of Caucasian clover (Trifolium ambigum} and zigzag clover (T. medium) were obtained over 3 seasons. The effects of 6 closing times in the final year were also measured. Caucasian clover cv. Alpine flowered earlier than cv. Monaro and the zigzag clover lines were last to flower. Seed yield of Monaro Caucasian clover in the second and third seasons averaged 400 kg/ha while cv. Alpine produced a maximum of 355 kg seed/ha. Pests and poor pollination were the major limitations lo high yields of zigzag clover seed. Kentucky zigzag clover produced 300 kg seed/ha when seed …

Breeding Hexaploid Pennisetums For Improved Seed Production, D A. Diz, S C. Schank

IGC Proceedings (1977-2023)

Interspecific hybrids between pearl millet (Pennisetum glacum) and elephantgrnss (P. purpureum) have many desirable characteristics, but they are sterile and do not have the ability to reproduce subsequent generations from seed. To overcome this barrier, we have obtained fertile hexaploids and have begun a breeding and selection programme among hexaploid progeny which produce seed. Seven hexaploid genotypes were selected and characterised as to panicle, seed and seedling traits. Weight of 100 seeds ranged from 0.152 to 0.247 g for the different genotypes. The number of seed harvested varied from 190 to over 700 per panicle. Germination of …

Herbage Seed Production In Norway, Ragnar Hillestad

IGC Proceedings (1977-2023)

Seed of all important species of perennial grasses and clover for northern areas can be produced in Norway, with good quality, at about 60°N. Norway has built up its own plant breeding with seed production and is self-supporting in seed of the most important species for use in agriculture. The seed yield per area unit of grass species decreases from south lo north, but there are differences among cullivars depending on where the breeding work has been carried out. The short growing·season makes it difficult for some species to establish a good stand so the plants can flower and give …

Effect Of Propiconazole And Tebuconazole On Seed Production Of Tall Fescue, M D. Hare

IGC Proceedings (1977-2023)

When stem rust (Puccinia graminis Persoon) invaded a tall fescue (Festuca arrundinacea Schreb.) stand a fungicide, propiconazole, applied at 250 g ai/ha, increased seed yields by more than l000 kg/ha compared with untreated plots. Propiconazole applied at ear emergence increased seed yields more than when applied at anthesis or at both times. Propiconazole significantly (P<0.05) increased seeds/spikelet and reduced leaf senescence during seed development and at harvest compared with untreated plots. Stem rust (Puccitiia graminis Persoon) severely infected the control plots but not the plots treated with propiconazole at ear emergence. In a second trial, when only a minor trace of stem rust was observed, propiconazole and tebuconazole did not affect seed yields of tall fescue.

Effect Of Time And Rate Of Application Of The Growth Regulators Paclobutrazol And Flurprimidol On Seed Yield In Tall Fescue, M D. Hare

IGC Proceedings (1977-2023)

Paclobutrazol and flurprimidol were applied to a mature stand of tall fescue (Festuca anmdi11acea Schreb. cv. Grasslands Roa) at l and 2 kg ai/ha at spikelet initiation (SI) and floret initiation (Fl) in 1985. Paclobutrazol at 2 kg ·ai/ha, applied at both SJ and FI, increased P(<0.05) seed yields but the lower paclobutr z I rate and flurprimidol had no significant effect on seed yields.

Effect Of Boron And Nitrogen Application On Seed Production Of Lotus Uliginsus, M D. Hare, R A. Carran

IGC Proceedings (1977-2023)

Four rates or boron (B) and 2 rates of nitrogen (N) were applied to a mature stand of lotus 11ligi11os11s Schk. cv. Grasslands Maku before flowering, on 10 November 1988. The 2 rntes of N (40 and 80 kg N/ ha) were either applied once or applied at 5 and 10 kg N/ha respectively, at weekly intervals for 8 weeks. N did not increase seed yields. Weekly applications of N significantly (P<0.05) decreased seed yields by 28%. B at 0.91 kg/ha increased seed yields by 7% but this increase was not significant. While seed yields in some tropical legumes may benefit from N application, Grasslands Maku does not benefit. Rather, seed yields are depressed. The application of B did not significantly change seed yields, but more research on B may be needed in areas where B availability is thought to be low.

Effects Of Defoliation Intensity, Frequency And Time Of Final Defoliation Of Seed Yield Of Barrel Medic, F N. Muyekho, E D. Carter, G K. Mcdonald

IGC Proceedings (1977-2023)

Swards of barrel medic (Medicago truncatula cv. Parnggio), sown at 20 kg/ha (1990), or 20 kg/ha or 200 kg/ha ( 1991 ), were mown to 3 or 6 cm height at intervals up to flowering, or 10 or 20 days after the start of flowering. In 1990, the swards were heavily grazed in July before imposing the defoliation treatments; in 1991 the swards were mown to 3 cm once in July. The responses to defoliation differed between the 2 years, because of the vigour of the sward at the time of imposing the cutting treatments. In 1990 severe defoliation …

White Clover Seed Production In Northern Italy: Yield And Components For Five Cultivars, Renato Paoletti, Carla Locattello

IGC Proceedings (1977-2023)

Two medium- (Hollandicum) nnd 3 large-leaved white clover (Trifolium repens.v L.) cultivar types (Ladino) were assessed for seed yield and components during 1988-1991, at Lodi (Po Valley). Dry matter yield wns also evaluated. The analysis of components showed significant (P=0.05) differences among the tesled cul ti vars. The large­lenved varieties Espana and Regal had the highest number of ripe heads/m2 and number of florets/head. The medium-leaved varieties Merwi RvP and Olwen showed good values for seed set only. As to potential and actual seed yield in the first harvesting year, Espanso and Regal were significantly the highest seed …

Creeping Bentgrass Seed Production In Western In Western Canada, S R. Smith Jr, D J. Cattani

IGC Proceedings (1977-2023)

Creeping bentgrass (Agrostis stolonifera L.) is an important species for golf courses and high value turfgrass areas throughout the world. Most of the seed production for this species is in the state of Oregon, but there is potential for seed production in western Canada. The objective of this research was to determine the potential for creeping bentgrass seed production in Manitoba under dryland conditions through cultivar evaluation trials and management studies including: optimal seeding dates, seeding rates, row spacings, nitrogen fertiliser and stand renovation. The results of these studies suggest a 1 kg/ha seeding rate and 30-cm row spacing, …

The Potential Of Weed Control To Improve Seed Production In Selected Tropical Forage Legumes, S Kachelriess, S A. Tarawali

IGC Proceedings (1977-2023)

Trials have been conducted in the subhumid zone of Nigeria to assess the potential of different weed control methods to improve seed quantity and quality using three tropical forage legumes: Centrosema pascorum cv. Cavalcade, Chamaecrista rotundifolia cv. Wynn and Stylosanthes hamata cv. Verano. Manual weeding was done at different times and intervals during the growing season and a range of herbicides was tested at different application rates and times. Manual weeding generally produced higher seed yields and purity if plots were weeded in the early and mid growing season. Intervals between weedings and the frequency of weeding was …

Ovule Fertility - A Tool For Selecting High-Fertility Populations Of White Clover, S V. Pasumarty, T Matusmura, S Higuchi

IGC Proceedings (1977-2023)

A field experiment was conducted lo clarify the factors responsible, for poor seed set in 4 white clover (Trifolium repens L.) cultivars. Although the mean number of ovules per floret was 5.18-5.29, lhe average number of seeds per floret was found to be only 1.23-1.82. A' stain-clearing technique was used to examine the cytoplasmic state of the embryo sac in intact, unfertilised, mature ovules and it was found that 28;33% of ovules per carpel were sterile. The abortion rate of fertilised ovules and immature seeds (7 days after pollination) ranged between 32 and 34%. Beyond this period, ii was …

Preliminary Screening Of 17 Tropical Grasses For Tolerance To Eight Gramineaceo Herbicides, D S. Loch, G L. Harvey

IGC Proceedings (1977-2023)

Successful seed production of tropical grasses depends on effective weed control. In particular, annual grass weeds compete strongly with perennial grass seed crops during establishment, and invasion by other perennial grasses can also occur. Glasshouse screening experiments involving 15 tropical grass cultivars and two perennial grass weeds were carried out to identify herbicide and grass combinations warranting more detailed investigation. Herbicides at standard ·rates for arable crops were applied either pre-emergence (at sowing) or post-emergence (14 days after sowing). Metribuzin and four herbicides developed for wild oats control (diclofop-methyl, flamprop-methyl, tralkoxydim, tri-allate) showed almost no useful selectiviiy. Marked differences, however, …

Reproductive Abortion In Birdsfoot Trefoil (Lotus Corniculatus L.), M J. Hill, Supanjani

IGC Proceedings (1977-2023)

Although reproductive abortion in Lotus coornculatus has been previously reported, this paper attempts to highlight the relative importance of various stages in the reproductive sequence as contributors to reproductive abortion. Flower buds consistently aborted one floret bud before the flowerhead opens. However, throughout the flowering season only about 30% of the 47 (range 29-72) ovules in an ovary successfully developed seeds and only about half of the florets in an open flower successfully developed pods 30 days later. Since no live pods were found without fully developed seeds, ii is suggested that seed is the main cause of pod abortion …

Effect Of Tiller Emergence Time In Relation To Autumn And Spring Defoliation On Contribution To Yield In Lolium Perenne L., P D. Hebblethwaite, T.G A. Clemence, J.J J. Wiltshire

IGC Proceedings (1977-2023)

The contribution to seed yield of tillers emerging at different times in a Lolium perenne L. seed crop which was defoliated by mowing either in autumn only or in autumn and spring (al floret initiation (FI)) was assessed in 1980 at the University of Nouingham, UK. Tillers were marked at monthly intervals from December until May. Autumn-emerged tillers contributed most to final seed yield, and the extent of apical decapitation by mowing at FI was most severe in this group. Autumn defoliation, however, increased the survival and fertility of spring-emerged tillers. The latter had fewer spikelets, and produced seed of …