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Assessing Weed Canopy Cover in No-Till and Conventional Tillage Plots in Winter Wheat Production Using Drone Data
Get PDFWeed canopy cover assessment, particularly using drone-acquired data, plays a vital role in precision agriculture by providing accurate, timely, and spatially detailed information, enhancing weed management decision-making in response to environmental and management variables. Despite the significance of this approach, few studies have investigated weed canopy cover through drone-based imagery. This study aimed to fill this gap by evaluating the effects of conventional tillage (CT) and no-till (NT) practices on weed canopy cover in a winter wheat field over two growing seasons. Results indicated that in the 2022–2023 season, weed populations were similar between tillage systems, with a high mean weed cover of 1.448 cm2 ± 0.241 in CT plots. In contrast, during the 2023–2024 season, NT plots exhibited a substantially higher mean weed cover (1.784 cm2 ± 0.167), with a significant overall variation (p \u3c 0.05) in weed distribution between CT and NT plots. These differences suggest that, while CT practices initially mask weed emergence by burying seeds and disrupting root systems, NT practices encourage greater weed establishment over time by leaving seeds near the soil surface. These findings provide valuable insights for optimizing weed management practices, emphasizing the importance of comprehensive approaches to improve weed control and overall crop productivity
Enhancing Sustainable Cultivation of Organic Bell Pepper through Fulvic Acid (FA) Application: Impact on Phytochemicals and Antioxidant Capacity under Open-Field Conditions
Get PDFFulvic acid (FA) is an eco-friendly solution for reducing the reliance on agrochemicals and enhancing crop quality. The study aimed to investigate the impact of soil and foliar application of FA on the phytochemical content and antioxidant properties of organically grown bell peppers at both the green and red stages. Bell pepper cv. Revolution was grown under open-field conditions at the certified organic farm at Tennessee State University, Nashville, with nine treatments and three replications. FA was applied as a soil drench and foliar spray at four different rates (0, 2.3, 5.5, 7.8, 10.9 mL L−1). The fruits were harvested 55 days (green stage) and 86 days after transplantation (red stage). The study showed significant differences (p ≤ 0.05) between the treatment and maturation stage. The foliar treatment of 7.8 mL L−1 resulted in the highest phenolic content in green bell peppers. The highest total flavonoid content in red bell peppers was achieved with a soil treatment of 7.8 mL L−1. Additionally, the highest level of vitamin C in red bell peppers occurred with a soil concentration of 5.5 mL L−1. In conclusion, applying FA as a biostimulant can enhance the quality of organically grown bell peppers, offering promising opportunities for sustainable agricultural practices
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No full texthttps://digitalscholarship.tnstate.edu/m-chamberlain-drawings/1018/thumbnail.jp
Tullahoma Painting
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Co-Twin Sex Effects on Fitness and Performance in Young Meat Goat Does
No full textThis study examined if sex of the co-twin influenced reproductive and health traits in meat goat does. Does born as twins (n = 382) from 2003-2022 in the Tennessee State University Research herd were evaluated for growth, health, and reproductive traits. The study does represented several breed-types. Does were classified as having a female co-twin or male co-twin and entered the breeding herd as two-year-olds. Females born with a male co-twin weighed less (P \u3c 0.01) at birth and at weaning compared to cohorts born with a female co-twin. Over two production years, Breeding weight, kidding rate, weaning rate, survival rate, packed cell volume, and fecal egg counts at kidding and weaning were not influenced by co-twin category. Females with a male co-twin had lower FEC during breeding. The interaction of co-twin category with litter size weaned for weaning PCV (P \u3c 0.05) and FEC (P\u3c 0.01), showed does with a male co-twin who weaned singles had higher PCV counts and lower FEC counts. Over two production years, there was a tendency (P = 0.10) for does, with a male co-twin tended to wean less kid(s) than a doe with a female co-twin. In summary, male co-twins reduced early early doe growth traits, and had variable effects on young doe fitness traits. Further studies following the does as they age may reveal more of the sex of co-twin effects on doe fitness
Chemical Control of Powdery Mildew of Bigleaf Hydrangea
Get PDFThe efficacy of the fungicide pydiflumetofen + difenoconazole (Postiva) was evaluated at varying application rates and intervals for the control of powdery mildew (Golovinomyces orontii, formerly Erysiphe polygoni) in bigleaf hydrangea (Hydrangea macrophylla ‘Nikko Blue’). Container-grown hydrangeas were arranged in a completely randomized design with six single-plant replications. Experiments were done in 2022 and 2023 under both greenhouse and shade house conditions (56% shade). Powdery mildew in hydrangea was developed naturally. Pydiflumetofen + difenoconazole at 1.1, 1.6, and 2.2 ml·L21 and a standard fungicide azoxystrobin + benzovindiflupyr (Mural) at 0.5 g·L21 were sprayed to runoff on 2-, 4-, and 6-week intervals. Plants that were not treated with fungicide served as the control. Plants were evaluated weekly for disease severity (0% to 100% foliage affected) and defoliation (0% to 100% defoliation). The season-long area under the disease progress curve (AUDPC) and defoliation progress curve (AUDFC) were calculated for the evaluation period. The initial and final plant height and width were recorded, and height and width increase were determined. Pydiflumetofen + difenoconazole and azoxystrobin + benzovindiflupyr significantly reduced final disease severity, AUDPC, and defoliation both in the greenhouse and shade house compared with control plants. In both greenhouse trials and the 2022 shade house trial, AUDFC was reduced in all treatments compared with the control plants. However, AUDFC was not reduced by all treatments in the 2023 shade house trial. Pooled over application intervals, the low rate of pydiflumetofen + difenoconazole was as effective as the medium and high rates of pydiflumetofen + difenoconazole and azoxystrobin + benzovindiflupyr in reducing final powdery mildew severity and AUDPC both in the greenhouse and shade house in both 2022 and 2023. No significant differences between application intervals were noted in final disease severity and progress. Control of powdery mildew with fungicides failed to increase plant dimensions (i.e., plant height and width) compared with the no fungicide control. Because all application rates and intervals of pydiflumetofen + difenoconazole provided comparable powdery mildew disease control, it is suggested that using a low rate of pydiflumetofen + difenoconazole with the longest application interval (6 weeks) is the most cost-effective approach for managing powdery mildew in bigleaf hydrangeas