الملخص
The study was conducted to investigate the knowledge of the farmers on pesticide use in selected crops during 2019-22. Two crops namely paddy and cabbage were selected and tow districts that have higher area namely Koppal and Belagavi were selected. In each district, two taluks and eighty farmers were selected for each crop by simple random procedure to form a total sample of 160 farmers. Overall knowledge index of pesticides by farmers was higher in case of paddy (73.57%) and cabbage (64.76%) farmers. Among the various dimensions, knowledge index was highest with respect to concentration and application practice (96.72% & 82.97%), types of sprayers and maintenance (91.25% & 87.50%), IPM practices (73.75% & 70.00) among paddy, and cabbage. Further, knowledge with respect to pest identification (69.06% & 57.66%), toxicity of pesticide and labels signs (68.59% & 61.09%) and disposal of pesticides and personal hygiene (67.86% & 61.09%) was around sixty percent among cabbage and paddy growers respectively. Further, low index was observed with respect to pesticide selection (26.88% & 38.54%) in case of paddy and cabbage growers respectively. Regarding overall knowledge of the pesticide use the findings revealed that Majority (72.50%) of the growers belongs to medium knowledge of pesticide category in case of paddy, low knowledge category in cabbage crop (38.75%) there is need for orientation to the farmers on different insect pests and pathogens through training and digital media. The short video on pests in different crops may be prepared and made access to upload on smart phones of farmers.
الملخص
Aim: Remote controlled paddy intercultural equipment was evaluated under sandy, sandy loam and loamy soils in terms of fuel consumption (l/h), field capacity (ha/h) and field efficiency (%).Study Design: Field evaluation of robotic paddy weeder.Place and Duration of Study: Dr NTR College of Agricultural Engineering, Bapatla. Duration of study was from August, 2023 to September, 2023.Methodology: The performance evaluation of weeder was conducted at rotary weeder rotational speed of 160rpm and weeding depth of 50mm in terms of the observations on fuel consumption, field capacity and field efficiency. Weeding operation was carried on 20th day and 40th day after transplanting. Each field test was conducted over a run length of 50m at constant speed and depth in different soils were recorded for all the parameters and each test was replicated thrice to eliminate experimental bias.Results & Discussion: The highest fuel consumption was observed as 2.2l/h when weeder was operated in loamy soil on 40 days after transplanting and the lowest was 1.2 l/h when the weeder was operated in sandy soils on 20 days after transplanting. The highest field capacity was observed as 0.098ha/h when weeder was operated in sandy soil on 20 days after transplanting and the lowest was 0.076ha/h when the weeder was operated in loamy soils on 40 days after transplanting. The highest field efficiency was observed as 81.66% when weeder was operated in sandy soil on 20 days after transplanting and the lowest was 63.33% when the weeder was operated in loamy soils on 40 days after transplanting.Conclusion: The performance of remote operated paddy weeder is best when operated on 20 days after transplanting when compared with 40 days after transplanting for increasing the productivity.
الملخص
Chlorpyrifos (CPF) is a popular organophosphorus pesticide that is widely employed in agricultural activities. However, we lack information regarding the relationship between soil microbial activity and population under CPF influence, which prohibits us from measuring CPF's actual impact on soil. In the present study, the effect of chlorpyrifos on soil microbial activity was assessed in an indoor pot experiment. The fertile soil was treated with 500 ppm of commercial-grade chlorpyrifos and paddy seedlings were transplanted. The soils treated with bacterial inoculants showed an increased microbial population on the 30th day after inoculation compared to soil receiving sole chlorpyrifos treatment. The same trend was followed on the 60th & 90th day as well. The combination of inoculants resulted in a maximum increase in the population compared to the single inoculants. As a result, there was an increase in soil enzymatic activities viz. dehydrogenase and phosphatase. Thus, inoculating the pesticide-degrading bacteria would lessen the detrimental effects of pesticides on the soil health.
الملخص
The study was conducted in the villages of Rayapuram and Keezhapattu in Tamil Nadu, as part of the National Innovation on Climate Resilient Agriculture (NICRA) project in the Needamangalam district of Thiruvarur from 2015 to 2018. These villages frequently experienced floods, particularly impacting the rabi season's crop growth and maturity. The monsoon season (September to December) contributed to about 71% of the total rainfall. A comparative analysis was carried out to assess the economic performance of the flood-resistant paddy variety CR 1009 sub 1 in contrast to the commonly grown CR 1009. Traditionally, farmers in Rayapuram and Keezhapattu favored CR 1009 due to its high market value during the monsoon period. However, they faced low income due to flooding in the rabi season. To address this challenge, scientists from KVK, Thiruvarur, recommended the flood-tolerant paddy variety CR 1009 sub 1 for cultivation during the rabi season under the "National Innovations in Climate Resilient Agriculture (NICRA)" project. Specific climate-resilient technologies, including flood-tolerant paddy variety "CR 1009 sub 1" and a high-yield, long-duration rice variety, were tested and demonstrated in the project villages to ensure rice production despite climatic variations leading to floods. It was crucial to assess how these varieties responded to climate vulnerabilities and how receptive farmers were to adopting them. Calculations were made to compare paddy productivity and economic returns under the improved technology with the traditional practices of farmers. The results indicated that the "CR 1009 sub 1" variety yielded higher harvests compared to the farmers' practices in the years 2015–16, 2016–17, and 2017–18, with increases of 12.60%, 11.69%, and 12.95% respectively. Furthermore, using improved technologies for paddy cultivation generated higher net returns of Rs. 57233, 60768, and 57728 per hectare in 2015–16, 2016–17, and 2017–18, respectively, in contrast to the farmers' practices (which yielded Rs. 49147, 50295, and 46266 per hectare in the same years). In comparison to the farmers' practices (with an average net return of Rs. 48569 per hectare and a benefit-cost ratio of 2.37), the demonstration fields showed an average net return of Rs. 58576 per hectare and a benefit-cost ratio of 2.56.
الملخص
In order to compare the costs, savings, and returns for the drill and transplanted methods of paddy cultivation, the current study, was conducted as a Research Review Committee Project in the Bhandara district of Nagpur division in Vidarbha region of Maharashtra, India. The method utilized was an exploratory social research design. Using the purposive population sampling technique method, a total of 72 sample paddy-growing beneficiary farmers from KVK, Sakoli Dist. Bhandara were chosen, and they were interrogated using a structured interview schedule. As a result, this study was limited to a sample of 72 paddy growers who were cultivating their paddy crops using both the transplanted and drill paddy methods. Findings of present study revealed that majority of the paddy growers were young with high education level, possessed small and marginal type of land holding with annul income in the range of Rs.75001/- to 1,50,000/-, medium level of scientific orientation,economic motivation,innovativeness respectively and favourable attitude towards to drill paddy technology. Further the findings of the study revealed that the highest gross returns received to farmers adopting were Rs. 85807.50/- and 81000.80/- per ha for transplanted and drill paddy cultivation methods respectively. The highest net returns at Cost A realized by the paddy farmers adopting drill paddy method of cultivation i.e. Rs.54738.28 per hectare. The highest benefit cost ratio (BC ratio) was released by the farmers adopting drill method of paddy cultivation at Cost A, Cost B and Cost C respectively.
الملخص
The high cost of raw materials has long hindered the large-scale commercialization of Trichoderma sp. conidiophore formulations. This study addresses the need for affordable, nutrient-rich alternatives by exploring the use of lignocellulosic residues, comprising lignin, cellulose, and hemicellulose, as a carbon source for cultivating Trichoderma. These fungi possess unique attributes, such as filamentous growth and prolific spore production, which make them valuable for composting lignocellulosic waste. Using different substrates with a combination of straws effectively helps in the decomposition of straw and enhances the mass multiplication of Trichoderma lexii (T-94a). Different substrates such as broken rice, grounded maize, gram flour, sorghum & broken wheat were used in combination with paddy straws. A combination of Maize + straw induced an early response in the mycelial growth of Trichoderma lexii (T-94a). After 5 and 10 days of inoculation, physical parameters such as growth and sporulation characteristics of T. lexii (T-94a) show highly uniform growth and profuse sporulation on maize and straw combination as compared to broken rice & straw, sorghum, and straw combinations. This finding has promising implications for improving agricultural practices and waste management. Further research can fine-tune the optimal substrate ratios to enhance the efficiency of biocontrol agents and waste decomposition. Scaling up the application of these substrate combinations in real-world farming scenarios and assessing their long-term environmental impact will be essential for realizing the full potential of these sustainable agricultural practices.
الملخص
Aim: To determine the ideal concentration of each priming agent among several selected concentrations which could produce robust paddy seedlings under laboratory conditions.Place of Study: The present investigation was carried out at College farm, Agricultural College, Bapatla.Methodology: Certain seedling vigour traits such as germination percentage, shoot length, root length, seedling length, seedling dry weight, seedling vigour index-I & II were recorded and analysed using crompletely randomized block design (CRD). Best concentration is the one with higher vigour indices.Result: The results revealed that, 1% Nacl, 40 ppm ascorbic acid, 150 ppm gibberellic acid, 2 % neem leaf extracts, 0.5 & 0.1 % P & Zn were optimum concentrations under each priming technique. When compared among all the techniques, priming with gibberellic acid @ 150 ppm performed better in terms of all the vigour traits.
الملخص
The study was conducted to know the nutrient status, yield, straw and harvest index in 4 different cropping systems viz., (i) manual transplanting; (ii) dry direct seeding; (iii) drum seeding and (iv) machine transplanting 120 soil samples were analysed, 30 from each establishment method. The soil fertility status from different establishment methods was studied by analysing the samples for pH, EC, bulk density, organic carbon, available nitrogen, phosphorous, potassium, iron, zinc, total organic carbon and carbon stock. The study revealed that there is a significant difference in bulk density ranged high in machine transplanting (1.48 Mg m-3) and low in dry direct seeding (1.45Mg m-3). pH of soils was neutral to slightly alkaline in nature and iron content of soils ranged from 5.75 to 8.97 mg kg-1.
الملخص
Carbon(C) is the only key to running in this worldly life and without carbon, nothing can be ensured, but the amount and form of C in different spheres of the earth make numerous changes. Changes in the carbon levels cause the lives of all living things. Soil carbon flux directly or indirectly affects the global climate and thus agriculture productivity. To ensuring the human rations, protection is intended for the rising populace worldwide, where the critical challenges in the agriculture sector are inevitable. Improved soil and nutrient supervisions and cultural practices are very imperative to tackling these troubles. Augmenting the productivity of various agro-ecosystems, soil productiveness, and carbon accretion via certain approaches become a must concern towards sustainable food production. “Paddy soils form the huge area of artificial swamplands on the earth, and serves as food basket for the world population also responsible for sequestering soil organic carbon potentially”. Rice accounts for around 9-10 % of the total cropland area globally, and their environmental conditions are responsible for storing organic carbon in soil, methane (CH4) production, and emit nitrous oxide (N2O) in meager amount. The present review signifies the present and future potential agricultural management practices, particularly soil and plant nutrition and their effects on soil organic carbon storage (SOCS) and carbon sequestration (CS) by paddies grown under submerged conditions compared to other crops. Increasing carbon inputs and reducing SOC losses in low land paddy soils need attention as its concern with GHGs that implies direct causes of global climate. As future direction, life-cycle assessments of certain practices in low land paddy soils helps in assessing the carbon footprints and sustaining the crop productivity consequently mitigating climate change. With this view, this review study was taken to the life of carbon in the terrestrial ecosystem and its accumulation in low land paddy soils moderated by cultural and nutrient management practices adapted for rice production in low lands.
الملخص
A study was conducted to determine the impact of Different Non- Conventional methods of Cultivation on yield and biological efficiency of Volvariella volvaceae. Among the different methods viz., bed method, partial compost method (3 days), partial compost method (6 days), partial compost method (9 days), intact straw + partial compost, Chopped paddy straw in polythene bags, Rolled paddy straw in polythene bag were experimented on yield and biological efficiency. However, the bed method of cultivation proved its well suitability among all the methods tested and gave highest yield and biological efficiency (1920 g and 15.0%) followed by partial compost method (3 days), single layer of straw + partial compost, partial compost (6 days) which exhibited (1025 g and 10.25%), (840 g and 8.40%) and (720 g and 7.20%) respectively. Maximum average weight of sporophore (24.6 g) was observed from bed method of cultivation which was significantly superior amongst all the methods evaluated followed by partial compost (3 days), single layer of straw + partial compost, partial compost (9 days) at 18.30 g, 16.15g and 15.5 g respectively. Smaller sizes of sporophores were noticed on partial compost (6 days) at average weight of 15 g. Average weight of sporophores noticed in chopped paddy straw and rolled paddy in polythene bag method were 12.2 g and 10 g respectively. Considering the major drawback of Volvariella that it has very low biological efficiency, bag method of cultivation was aimed to increase the biological efficiency of paddy straw mushroom.
الملخص
A study was conducted to determine the impact of surface sterilization techniques and different quantity of bed substrate on yield and biological efficiency in paddy straw mushroom cultivation. Among the various combinations of sterilization methods i.e., Plain water, Plain water + Calcium oxide @ 2%, Plain water + Bavistin 75 ppm & Formalin 500 ppm and steam sterilization 55 for ½ hour respectively tried on paddy straw substrate, Maximum yield and biological efficiency (1966 g & 15.2%) was obtained. To evaluate the biological efficiency of different layers and quantity of straw in bed method of cultivation i.e., 5 layers (4.0 kg), 4 layers (3.2 kg), 3 layers (2.4 kg) and 2 layers (1.6 kg) were tested. on biological efficiency four layers bed proved its superiority among all the number of substrate layers experimented, and gave highest biological efficiency (17.6%) followed by three layers and five layers (15.2%) and (14.5%) respectively. Two layers of bed (1.6 kg) were found to be less suitable and gave 13.8% biological efficiency of paddy straw. Maximum average weight of sporophores (24.21 g) was observed from four layers of beds followed by three layers and five layers (20.88 g) and (19.98 g) respectively. Smaller size sporophores were noticed in two layers of beds (14.18 g).
الملخص
Aim: To evaluate the weed control efficiencies of different mulching practices and legume intercropping in transplanted pearl millet.Study Design: Randomized Complete Block Design (RBD).Place and Duration of Study: The field trial was conducted during the Rabi season of 2022 at the school of agricultural sciences in Karunya Institute of technology and sciences, Coimbatore, Tamil Nadu.Methodology: The field trial consists of 8 treatments viz., T1 - PE of Atrazine 0.5kg/ ha +1 Hand Weeding at 30 DAT, T2 - Two Hand Weeding at 15 and 30 DAT, T3 - Paddy straw mulching at 5t/ ha 3 DAT, T4 - Black polythene mulching at 3 DAT, T5 - Black silver polythene mulching at 3 DAT, T6 - Intercropping of pulses (cowpea) (1:1), T7 - Intercropping of pulses (cowpea) (1:1) + PE Pendimethalin 0.75 kg/ ha, T8 - Un weeded check.Results: Results of the experiment proves that the intercropping of cowpea in pearl millet along with the pre-emergence application of pendimethalin proves to be beneficial and advantageous in terms of returns per rupee invested for profitable crop production, rather than going for polythene mulches. Hence adoption of legume intercropping in pearl millet, along with the usage of mild herbicides like pendimethalin, will be an economically viable and environmentally sustainable weed management practice for improving the yield of pearl millet.
الملخص
This study examined the Knowledge level of Paddy farmers on Climate Change the Nagapattinam district of Tamil Nadu state in India. It is situated in the coastal area and is very often subjected to natural calamities which were mainly reflected in the Paddy cultivation to the worst status. The ex-post facto research design was used in this research study. A sample size of 200 was fixed for the study. The data were collected with the use of a well-structured and pre tested interview schedule for farmers covering all the aspects of knowledge on Climate change. The respondents’ knowledge level of climate change was measured by designing exclusively the knowledge test. The study revealed that more than half of the respondents (55.00%) had a medium level of knowledge of climate change. Nearly one-third (32.50%) of the respondents had a high level of knowledge and a lesser number of respondents (12.50%) were found to be under the category of low- level knowledge. Educational status, farming experience, contact with extension agencies, information seeking behaviour, social participation, innovativeness, risk orientation and awareness had shown positive and significant associations with paddy farmers knowledge and these variables contributed to improving the knowledge level of the Paddy farmers on climate change. They had knowledge of changes in the rainfall patterns, extreme climatic events, changes in the crop growths stages, ground water table and pest and disease outbreaks but the famers don’t have enough knowledge on climate change adaptation strategies in Paddy cultivation with respect to tackle the problem of salinity, sodicity and effects of humidity in grain filling to cope up with climate change. Hence, it is recommended that special training programmes may be frequently offered in the study area to improve the knowledge and skill of the farmers on climate change.
الملخص
A solar photovoltaic (SPV) powered paddy winnower was developed and evaluated at CAET, BSKKV, Dapoli. In order to eliminate the operational problems and difficulties, it was proposed to modify the existing SPV power operated paddy winnower, for better and improved performance. The existing SPV operated paddy winnower was tested to find the operational difficulties, and the physical properties of different paddy verities i.e., Ratnagiri-1, Ratnagiri-6, karjat-3. Including the terminal velocity, angle of repose, bulk density. It was found that improving several parameters can eliminate the operational difficulties from the existing SPV operated paddy winnower. The necessary modifications were incorporated in a modified SPV operated paddy winnower. The modified SPV operated paddy winnower was tested for Ratnagari-1 Variety of paddy and its improved performances were reported.
الملخص
The ascomycete fungal pathogen Ustilaginoidea virens (Cooke) Takahshi cause false smut in rice and considerable yield loss. In this study, we collected isolates of U. virens from the rice growing ecosystems of Karnataka and characterized for cultural, morphological and molecular characters. The isolates of the fungus on Potato Sucrose Agar media exhibited distinct colonies with colony growth ranging from 21.50 mm (Uv-20) to 70.00 mm (Uv-15). The colony colour appeared as whitish to yellowish with varied growth pattern from flat, raised flat to fluffy and raised fluffy colonies with sectoring in Uv-1, Uv-3, Uv-6 and Uv-9 isolates. The isolates of U. virens also showed variation in the morphology of spores, where the conidia were globose, irregularly round to elliptical and warty on the surface with spore radius ranging from 2.91 to 5.36 ?m. The scanning electron microscopy revealed hyaline globose to irregularly rounded ornamented chlamydospores with prominent spines. Besides cultural and morphological characters, molecular identification of false smut isolates was confirmed through ITS sequencing which showed 91 to 99 per cent identity with U. virens in NCBI-BLAST analysis. Dendrogram constructed using ITS sequence data broadly separated the isolates into two major clusters with divergence among clusters. This ITS (internal transcribed spacer) sequencing of isolates should help better understanding of the phylogenetic relationships among these isolates.
الملخص
Soil salinity is one of the major abiotic stresses which affect crop productivity including rice, Oryza sativa L. Developing salt tolerant varieties gained considerable attention accordingly. Here, we studied salinity tolerance in rice crop. We screened ten rice genotypes for saline tolerance at different concentrations of 0 dSm-1, 2 dSm-1, 4 dSm-1, 6 dSm-1, 8 dSm-1,10 dSm-1, 12 dSm-1 and 14 dSm-1, respectively. Among the ten genotypes studied, CARIDhan-7 tolerated salt stress up to 6dSm-1 of irrigated water. Comparative transcriptome analysis was done with the genotypes by treating with saline water at 0dSm-1 and 6 dSm-1. A total of 1013 genes were differentially expressed under simulated stress conditions. Out of which, 551 genes were upregulated and 462 genes were downregulated. Based on the metabolic pathway analysis, the MAPK signaling pathway, along with the other 9 pathways were found to be enriched in the stressed sample. Nine ion transporter genes, 1potassium channel, 1 protein phosphatase gene, IAA homologs OsIAA9, two ROS scavenging-related genes, and 4 stress regulated genes identified were found to be significantly up-regulated along with some functional proteins previously reported under salt stress. An AP2-like ethylene-responsive transcription factor PLETHORA 2 was found to be downregulated. The results suggested that the CARIDhan-7 genotype undergoes various saline tolerant mechanisms and pathways in response to the stress imposed when compared to non-stressed seedlings.
الملخص
Salt stress is a major abiotic stress that limits rice productivity worldwide including India. As modern rice varieties are salt sensitive, infusing salt tolerance through breeding is a viable farmer-friendly approach. Breeding salt tolerant rice varieties has been slow due to complexity of the trait and high Genotype x Environment interaction in the salt affected field. Selection practiced in such a situation using conventional selection method, in the presence of competition, would be misleading. On the otherhand, selection is effective in the absence of competition in honeycomb selection and counteracts the disturbing effects of competition on effectiveness of selection. The present study was conducted to test the efficiency of honeycomb selection design in early generation of a rice cross to study genetics of yield and practice selection. All the characters studied in both the design showed non normal distribution except for panicle length in CSD. All the characters studied in both the design had lower coefficient of variation, high mean and high standard deviation in the HSD compared to CSD. Large number of genes with duplicate epistasis governs days to flowering whereas panicle length and single plant yield are governed by few number of genes with complimentary epistasis. Twenty nine F2 plants each in CSD and HSD were selected based on mean and plant index (SPY), respectively. Plants selected in HSD recorded higher percentage of increase over base population compared to CSD and found HSD to be superior to CSD because of enhanced phenotypic expression in the former by eliminating confounding effects of negative correlation between yielding and competitive ability.
الملخص
Acute lung injury (ALI), during the progression of infectious shock, leads to systemic inflammatory response syndromewith increased pulmonary capillary membrane permeability due to pulmonary inflammation and uncontrolled inflammatoryresponses. It may cause fatality in patients. Here, we evaluated the protective effect of breviscapine on ALI in rats withinfectious shock. Sprague-Dawley (SD) rats were assigned into Sham, model [lipopolysaccharide (LPS) group], andbreviscapine treatment groups (LPS + breviscapine group) and weighed. The lung coefficient, and the wet-to-dry weightratio (W/D) and moisture content of lung tissues were calculated. The pathological changes of the lung tissues were detectedusing hematoxylin-eosin (HE) staining, and the protein expressions of interleukin-1 beta (IL-1?), IL-6, and tumor necrosisfactor-alpha (TNF-?) were determined by enzyme-linked immunosorbent assay. Western blotting was conducted to measurethe protein expressions of toll-like receptor-9 (TLR-9) and nuclear factor-kappa B (NF-?B) (p65). Compared with LPSgroup, breviscapine significantly lowered the lung coefficient and the W/D and moisture content of lung tissues, relieved thepathological changes of lung tissues, reduced the protein expression levels of IL-1?, IL-6, and TNF-?, weakened theactivation of NF-?B (p65) in lung tissues, and repressed the protein expressions of TLR-9 and NF-?B (p65).
الملخص
Aims@#This study was aimed to evaluate the potential of several carriers to formulate the phages and retain their activity under various pH and temperature conditions.@*Methodology and results@#The skim milk, rice flour, corn flour and CalnuXan (calcium and magnesium) as carriers to formulate the isolated phage to maintain its activity under extreme pH and temperature conditions. Two phages formulated with carriers retained their viability at pH 5, pH 7 and pH 9 compared to that of the unformulated phages. Besides, the formulated phages also retained a high titre compared to the unformulated phages when they were exposed to 37 °C and 45 °C. Based on the in vitro study of the formulation, it was applied in the glass house. The plant height, leaf chlorophyll and disease scoring were recorded and analyzed. In the glass house, the rice plant treated with formulated phages showed higher plant height and chlorophyll content than those treated with unformulated or untreated phages. Nonetheless, both formulated and unformulated protected the rice plant, which showed lower disease severity than the untreated group.@*Conclusion, significance and impact of study@#Phage therapy has been used for treating plant diseases caused by pathogenic bacteria. Despite their effectiveness in killing the pathogen in vitro, the results were not reproducible in the field. Bacteriophages (phages) are sensitive to environmental factors and infection efficiency was dropped when exposed to harmful environments. However, this study successfully formulated two novels Xanthomonas phages, as biocontrol agents against bacterial leaf blight (BLB) disease in rice.
الموضوعات
Xanthomonas , Bacteriophagesالملخص
The application of synthetic fertilizers reduces the natural fertility of the soil and contaminates groundwater. Some photosynthesis inhibitors at ultra-high dilution (UHD) increase photosynthesis, growth, and yield of crops. A weedicide Paraquat at UHD enhanced the growth and yield of potatoes in fields. The objective is to see whether the UHD of Paraquat is also effective on rice. This weedicide was serially diluted with distilled water and manually succussed in 30 steps following the preparation of homeopathic dilutions called potencies. In this way, the 30thpotency of Paraquat called Paraquat 30 cH was prepared and preserved in 90 % ethanol. Paraquat 30 cH was diluted with water 1:1000 (v/v) and sprayed on rice plants in a field measuring 0.3125 acres. The control plot of the same area was situated 300 meters away from the test plot. Three treatments were given at an interval of 7 days. The treated plot showed increased growth, chlorophyll content, and rice yield significantlycompared to control. The UHD of the weedicide produced precisely the opposite effect of the crude material on plants. The increased growth and yield of rice by Paraquat 30 cH may be due to the enhancement of photosynthesis of treated plants. The UHD of Paraquat increased the yield of rice by 19.35% over the control.