RÉSUMÉ
At the wetland farm of S.V. Agricultural College, Acharya N.G. Ranga Agricultural University, Tirupati, Andhra Pradesh, India, a field experiment was carried out during the (rainy season) kharif 2020 to evaluating weed management strategies and the differential effects of herbicides on weed dynamics and crop performance of foxtail millet [Setaria italica (L.) Beauv] grown under the irrigated conditions of Rayalaseema. The current study has shown that the application of pre-emergence pretilachlor 500 g ha-1 with intercultivation at 20 DAS was followed by hand weeding twice at 20 and 40 DAS and it led to the highest weed control efficiency, including foxtail millet's nutrient uptake, and the lowest weed density and dry weight. In unweeded check, a heavy weed infestation reduced the amount of nitrogen, phosphorus, and potassium absorbed by crop by 45.67, 18.03, and 35 kg ha-1, respectively. Crop growth parameters, straw and grain production was increased by hand weeding twice, however the benefit-cost ratio lagged behind the most effective weed management strategy, which is applying pre-emergence of pretilachlor 500 g ha-1with intercultivation at 20 DAS. The present experiment indicated that wherever the labour availability for hand weeding is abundant and cheaper, one can go for hand weeding or opt for the said herbicide recommendation taking into the economical considerations.
RÉSUMÉ
The current global scenario firmly emphasizes the need to enhance eco-friendly agriculture practices for sustainable agriculture. Chemical agriculture has made an adverse impact of the health care of not only soil but also the beneficial soil microbial communities and the plants cultivated in these soil. This eventually has led to a high demand of botanical and organic produce by the present day health conscious society and periodic attempts are being made by farmers all over the world to depollute. Application of heavy doses of chemical fertilizers and pesticides are being used by the farmers to get a better yield of various agricultural crops. These chemical fertilizers and pesticides decrease soil fertility and cause health problems to the consumers. The new approaches to the use of botanical and organic amendments in farming have proven to be effective means of improving soil structure, enhancing soil fertility and increasing crop yields. Botanical and organics play vital roles in increasing soil fertility and increasing yield. The study was designed to check the response of botanical and organics on yield and seedling quality parameters such as field emergence percent, plant height (30, 60, 90 DAS), days to 50% flowering, number branches per plant, number of pods per plant, number of clusters per plant, days to maturity, seed yield per plant, seed yield per plot, harvest index, germination percentage, speed of germination, root length, shoot length, seedling length, seedling dry weight, seedling fresh weight, seedling growth rate, root: shoot ratio, seed metabolic efficiency, mobilization efficiency, vigour index-I, vigour index-II, electrical conductivity. For this experiment the seeds of RGC1066 variety collected from department of genetics and plant breeding, Sam Higginbottom University of Agriculture Technology and Sciences, Prayagraj during 2021-2022, to find out the influence of pre-sowing seed treatments with botanical and organics, seeds treated with panchagavya, beejamruth, jeevamruth, neem leaf extract and vermiwash at different concentrations viz 2, 3, 5, and 10% for 12hours along with control (no treatment). It is found that all treatments showed improved performance than untreated seeds, but it was observed that seeds treated with panchagavya@10% for 12 hours performed better in comparison to other treatments. This study can be helpful to reach new horizons of research in the field of sustainable agriculture, natural resource conservation and seed technology to overcome the germination problem and improve crop growth and yield eventually.
RÉSUMÉ
Background: Vitiligo is an acquired disorder characterized by circumscribed depigmented macules devoid of identifiable melanocytes. Complex genetic, immunological, neural and self destructive mechanisms interplay in its pathogenesis. According to autocytotoxic hypothesis, oxidative stress has been suggested to be the initial pathogenic event in melanocyte degeneration. Aims: The aim of our investigation was to evaluate the role of oxidative stress by measuring levels of the antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) in lesional and normal skin of patients with vitiligo and in the skin of normal controls. Methods: We determined the activity of SOD in lesional and non-lesional skin and CAT in lesional skin only of 25 vitiligo patients and 25 controls by using the spectrophotometric assay and Aebi's method, respectively. Results: There was statistically significant increase in the levels of SOD in vitiliginous and non vitiliginous skin of patient group compared to the control group ( P < 0.001). No significant difference was found between the levels of SOD in lesional skin and non-lesional skin of vitiligo patients. The levels of CAT in the skin of patients were found to be significantly lower than those of controls ( P < 0.001). Conclusions: There is increased oxidative stress in vitiligo as is indicated by high levels of SOD and low levels of CAT in the skin of vitiligo patients.