Journal of Applied and Natural Science
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Some deformed specimens of Mystus bleekeri (Day) and Labeo bata (Ham. Buch) from the river Chenab in Pargwal wetland, Akhnoor, Jammu
Get PDFFour adult deformed specimens of Mystus bleekeri showing caudal fin deformities viz complete degenerated caudal fin, degenerated upper caudal fin lobe, degenerated lower caudal fin lobe and truncated caudal peduncle and bulbous caudal fin base and one specimen of Labeo bata with a blunt head and terminal mouth were observedamong the fish collections from the river Chenab in Pragwal wetland area and have been described. Deformities in M. bleekeri are most probably caused by Myxobolus infection and in L. bata it is the result of injury
Impact of climate change and anthropogenic interventions on natural vis-à-vis human resources in Kashmir, India – An overview
Get PDFClimate change is one of the biggest challenges the world is facing today and it has the potential to create havoc with the agrarian livelihoods across the globe. Therefore, this paper attempts to explain the probable impacts of human induced climate change on natural resources in Kashmir, India. An ample amount of literature was reviewed meticulously to ascertain the impacts of climatic variability on natural resources vis-a-vis agriculture, biodiversity and water bodies as well as other common issues related to human resources in Kashmir. Loss of certain indigenous food varieties (i.e. nick cheena), reduction in natural forest cover (less than 11%) and loss of important water resources has aggravated the already dilapidated situation in this most vulnerable state of India. Scientific evidences revealed that there will be more devastating climatic effects on natural resources in Kashmir- India, which will fall disproportionately on poor communities, particularly dry land farmers, forest dwellers and fishermen of the state
Cultural and morphological studies on Ponnampet leaf and neck blast isolates of Magnaporthe grisea (Herbert) barr on rice (Oryza sativa L.)
Get PDFThe study was carried out to standardize the optimal growth, sporulation and production of perfect stage of pathogen on different media. Among different media used such as Potato dextrose Agar (PDA), Oat meal Agar, Ragi flour agar, yeast extract + 2% soluble starch, Host extract + 2% soluble sucrose agar, Potato dextrose agar + Biotin + Thiamine and Rice flour agar, Oat meal agar and potato dextrose agar was found to be best media for radial growth and sporulation of M. grisea. Maximum conidia length (9.46?m) and breadth (7.36?m) was recorded in Oat meal agar followed by Potato dextrose agar and least conidia length (6.15 ?m) and breadth (5.11 ?m) was recorded in ragi flour media after 20 days of inoculation. Conidial size varied in leaf and neck blast isolates, the maximum mean colony diameter of 88.00mm and 89.16mm in neck and leaf blast was recorded in Oat meal agar respectively. The maximum sporulation mean index was observed in Oat Meal agar of 3.15 ?m in leaf and 3.20 ?m in neck blast was recorded. The best growth of the pathogen was recorded at optimum pH range from 6.0 - 7.0 and temperature of 27oC. Therefore oat meal agar media was found to be best among all the media used for growth, sporulation, conidial size and colony characters of M. grisea
Evaluation of cultivars and packing materials during preparation and storage of ber candy
Get PDFBer (Zizyphus mauritiana) is known as poor man’s fruit and is rich in protein, phosphorus, calcium, carotene and vitamin-C. The present investigation was conducted at laboratory Department of Post Harvest Technology collage of Horticulture and forestry, Narendra Deva University of Agriculture & Technology, Kumarganj, Faizabad (U.P.) during the year 2010-11. The physico-chemical characteristics were evaluated for different caltivars viz., Illaichi, Ponda, Umran, Gola, Banarsi Karaka and Narendra Ber Sel-2. The cultivars physico-chemical composition of ber fruit and organoleptic quality of candies Banarsi Karaka was found best suited among all cultivars for making of candy. Storage studies indicated that LDPE film was better in comparison to glass jar and plastic jar for packaging of ber candy at ambient temperature and candy was found in good condition after 9 months of storage period in LDPE film. The maximum cost benefit ratio of ber candy was found to be 1: 1.25 than packed in LDPE film followed by plastic jar and glass jar
Status of tomato Lycopersicon esculentum Mill.cultivation and pesticide use in Golapar area of Uttarakhand, India
Get PDFTomato is one of the most widely grown temperate vegetable crops grown in Himalayas and Tarai region of Northern India. Being the high value crop is important in raising the income of the farmers. However, from past few years, they are facing the problem of numerous diseases in the crop and subsequent yield losses and thusaffecting the economic status of the growers. Present study was carried out with the objective to discern the current status of disease occurrence in tomato and management strategies followed by the growers of Golapar area of District Nainital, a major tomato growing area of Uttarakhand state. Purposive sampling was followed for selection of the area and respondents were selected randomly. Data was collected through structured questionnaire. It was found that tomato is the key vegetable in the area and preference of the varieties was largely based on the marketable yield, larger fruit size, higher market price and also depends on the availability of seed with the local distributer. Average loss ranges from 20-80% due to late blight, leaf curl, early blight, wilt and stem rot diseases. Application of pesticides was exceedingly high as number of pesticide sprays was varied in the range of 10-40. However, disease management varied from 5-60% depending on the chemical application by the farmers. This study will be supportive to manipulate adopted strategies to reduce the losses and low cost proven technologies can be introduced for disease management for the benefit of the farmers
Development of farm pond operational modeling using Neuro-Fuzzy technique
Get PDFStudy was conducted to derive operational model for a farm pond of 3000 cubic meter capacity at Center for protected cultivation technology (CPCT), Indian Agricultural Research Institute, New Delhi, India which was the important source of irrigation water of the farm of the area 10 ha. The Neuro-Fuzzy approach was used to develop the operational model and to derive operational rules for proper irrigation scheduling of the horticultural crops grown at CPCT. Based upon the inputs like crop water requirement, evaporation losses and farm pond inflow the model predicting outflow of the reservoir was developed. The developed model was having high accuracy and predictability when tested statistically. The coefficient of determination (R2) was found to be 0.96, whereas the model efficiency (E) was 0.97 which shows the high reliability of the model. The operating rules which were of ‘If-Then’ form were also developed which would lead to better management of the farm pond system and would also improve the irrigation scheduling at CPCT farm, IARI, New Delhi
Mycoparasitic capabilities of diverse native strain of Trichoderma spp. against Fusarium oxysporum f. sp. lycopersici
Get PDFThe Fusarium wilt of tomato (Lycopersicon esculentum Mill.) caused by Fusarium oxysporum f. sp. lycopersici (Sacc.) Snyder and Hansen is recognised as one of the most devastating disease and major yield limiting factor in tomato growing regions worldwide. For eco-friendly and sustainable management of the disease, 19 Trichoderma native isolates belonging to 3 species of the genus, T. harzianum, T. asperellum and T. virens were evaluated in vitro against the pathogen using dual culture method. Out of 19 isolates, 8 isolates showed mycoparasitism, 8 isolates showed antibiosis and remaining showed lysis. Microscopic observations of Fusarium oxysporum f. sp. lycopersici (FOL) growth in dual cultures revealed that growth inhibition occurred just before near to contact with the antagonist. All T. harzianum isolates tested exhibited coiling around the hyphae of FOL. Isolates of T. harzianum, showed good coiling and growth inhibition of the pathogen. The T. harzianum strains did not differ in coiling pattern and gave somewhat equal coiling performances. Strains of T. asperellum, showed coiling but the coiling pattern of all these strains was different. Only one strain of T. virens showed coiling out of 2 strains. Among them T. harzianum (SVPUTh91) showed the best performance in vitro as biological control agent against FOL followed by T. asperellum and T. virens, resulting in 83, 73 and 65% reduction in colony growth, respectively
Use of growth regulators as priming agent for improvement of seed vigour in tomato (Lycopersicum esculentum)
Get PDFSeeds of tomato cv. Keabi were primed with of three important growth regulators viz Gibberellic acid (GA3), Napthlene acetic acid (NAA) and potassium nitrate (KNO3). Four concentration of each, Gibberellic acid and Napthlene acitic acid (25ppm, 50ppm, 75ppm.100ppm) and two concentration of KNO3 (1% and 2%) were compared with the distilled water as control. For each treatment seeds were soaked in growth regulator for 24 hrs before put for the germination test. Fifty seeds in four replications were germinated on top of paper at 200C in seed germinator for 14 days. Normally germinated seedlings were counted which gave an estimation of germination percentage. Data was recorded on the germination percentage, shoot length, seed vigour index. Most of the treatments had significant positive effect on all the quality parameters. NAA had showed adverse effect on the root length while other growth regulators were found to be significant role to improve the root length. Maximum seed germination (74%) was observed at 50 and 75ppm GA3. Highest shoot length (4.83cm) was found at 25ppm of GA3 whereas enhancement of root length occurred with the priming of 1% KNO3 (3.52cm ). Seed vigour-I, on the basis of seedling length was observed higher at 25ppm. GA3 (720) and seed vigour –II on the basis of seedling dry weight was also observed maximum priming with 100ppm GA3 (1460). From this study it was suggested that GA3 priming has important growth regulator to enhance the seed germination as well as seed vigour. Before sowing seed should be priming with GA3 for obtaining high % germination and vigorous seedling that survive under adverse condition it also increase the uniformity of field plant stand
Study on interventions to reduce vibration transmission to power tiller operator
Get PDFPresent study focuses on interventions to reduce vibration transmitted to power tiller operator. In this study two operations (namely: standing mode and transportation) and three forward speeds (1.0, 1.5 and 2.0 kmh-1) were selected. In both selected operations vibration magnitudes were maximum at 2.0 kmh-1. In the standing mode vibration magnitudes in x, y and z direction were 5.83, 1.37 and 2.36 ms -2 at 2.0 kmh-1. In transportation vibration magnitudes were 6.81, 1.49, 2.82 ms-2 respectively in x, y and z direction at 2.0 kmh-1. The selection of vibration isolators were done on the basis of the transmissibility curves and the isolation region. The selected isolators were installed at interface between engine and the chassis. These interventions along with previously developed bush and sheet type interventions reduced vibrations up to 50.24, 69.06 and 59.08 % at 1.0, 1.5 and 2.0 kmh-1 in stationary mode. In transportation vibration reduction were 52.96, 65.98 and 36.67 % at 1.0, 1.5 and 2.0 kmh-1, respectively. The vibration reduction were high in stationary mode than transportation mode because in stationary mode vibration comes only from the engine but in transportation vibration comes from engine and the surface profile as well
Effect of phytohormones on shoot apex and leaf explants of Withania somnifera (Ashwagandha)
Get PDFAn efficient protocol for callus induction of Withania somnifera through in vitro culture of shoot apex and leaf explant was standardized. Of the various combinations of phytohormones evaluated, MS media supplemented with 6-furfuryl aminopurine (KIN) 0.5 mg/l + 2,4-dichlorophenoxy acetic acid (2, 4-D) 2.0 mg/l was found to be bestfor mean callus induction (86%) in leaf explants after 6 weeks of culture and in case of shoot apex expant the best response and growth of callusing was observed on MS medium supplemented with 2,4-D 1.0 mg/l + BAP 2.0 mg/l (77%).The response of callus growth increases gradually with the reductions in concentration of KIN in culturemedium of both the explants. This protocol might be used in further research for mass propagation of W. somnifera via indirect regeneration methods