The Punjab Agricultural University in Ludhiana, Punjab is one of the State Agricultural Universities in India. It was established in 1962 and is the nation's oldest agricultural university, after Govind Ballabh Pant University of Agriculture & Technology, Pantnagar. It has an international reputation for excellence in agriculture . It pioneered the Green Revolution in India in the 1960s and is considered as one of the best agricultural universities in India.It was bifurcated in 2005 with the formation of Guru Angad Dev Veterinary and Animal science University. Wikipedia.
Dhall R.K.,Punjab Agricultural University
Indian Journal of Ecology | Year: 2015
The present studies were conducted to obtain infonnation about the effect of ethephon and ethylene gas on ripening and quality of winter tomato using hybrid Avinash-3. The mature green tomatoes were treated with different concentrations of aqueous solution of ethephon (500,1000 and 1500 ppm) for 5 minutes and kept in storage room at 20±1°C and 90-95% RH. The tomato fruits harvested at green mature stage get successfully ripened in 9 days with application, of ethephon (500,1000,1500 ppm) but the rotting was more than 14 per cent till 9th day which makes fruits unmarketable. Therefore, the application of ethephon for ripening is not a good option. The another treatment comprised of exposing the mature green tomatoes to ethylene gas (100 ppm) inside the ripening chamber for 24 hours (20±1°C and 90-95% RH) and thereafter kept in the ripening chamber maintained at 20±1°C and 90-95% RH and this treatment resulted in adequate ripening of fruits after 9 days with unifonm red colour, desirable firmness, minimum rotting and acceptable quality and therefore this treatment is better over ethephon. In control fruits similar results of ripening, firmness, rotting and quality were observed as in case of ethylene gas (100 ppm) treatment but the fruits get longer time (11 days) to uniformly ripen.
Mukhopadhyay S.S.,Punjab Agricultural University
Nanotechnology, Science and Applications | Year: 2014
Attempts to apply nanotechnology in agriculture began with the growing realization that conventional farming technologies would neither be able to increase productivity any further nor restore ecosystems damaged by existing technologies back to their pristine state; in particular because the long-term effects of farming with "miracle seeds", in conjunction with irrigation, fertilizers, and pesticides, have been questioned both at the scientific and policy levels, and must be gradually phased out. Nanotechnology in agriculture has gained momentum in the last decade with an abundance of public funding, but the pace of development is modest, even though many disciplines come under the umbrella of agriculture. This could be attributed to: a unique nature of farm production, which functions as an open system whereby energy and matter are exchanged freely; the scale of demand of input materials always being gigantic in contrast with industrial nanoproducts; an absence of control over the input nanomaterials in contrast with industrial nanoproducts (eg, the cell phone) and because their fate has to be conceived on the geosphere (pedosphere)-biosphere-hydrosphere-atmosphere continuum; the time lag of emerging technologies reaching the farmers' field, especially given that many emerging economies are unwilling to spend on innovation; and the lack of foresight resulting from agricultural education not having attracted a sufficient number of brilliant minds the world over, while personnel from kindred disciplines might lack an understanding of agricultural production systems. If these issues are taken care of, nanotechnologic intervention in farming has bright prospects for improving the efficiency of nutrient use through nanoformulations of fertilizers, breaking yield barriers through bionanotechnology, surveillance and control of pests and diseases, understanding mechanisms of host-parasite interactions at the molecular level, development of new-generation pesticides and their carriers, preservation and packaging of food and food additives, strengthening of natural fibers, removal of contaminants from soil and water, improving the shelf-life of vegetables and flowers, clay-based nanoresources for precision water management, reclamation of salt-affected soils, and stabilization of erosionprone surfaces, to name a few. © 2014 Mukhopadhyay.
Sandhya,Punjab Agricultural University
LWT - Food Science and Technology | Year: 2010
Fresh produce is more susceptible to disease organisms because of increase in the respiration rate after harvesting. The respiration of fresh fruits and vegetables can be reduced by many preservation techniques. Modified atmosphere packaging (MAP) technology is largely used for minimally processed fruits and vegetables including fresh, "ready-to-use" vegetables. Extensive research has been done in this research area for many decades. Oxygen, CO2, and N2, are most often used in MAP. The recommended percentage of O2 in a modified atmosphere for fruits and vegetables for both safety and quality falls between 1 and 5%. Although other gases such as nitrous and nitric oxides, sulphur dioxide, ethylene, chlorine, as well as ozone and propylene oxide have also been investigated, they have not been applied commercially due to safety, regulatory, and cost considerations. Successful control of both product respiration and ethylene production and perception by MAP can result in a fruit or vegetable product of high organoleptic quality; however, control of these processes is dependent on temperature control. © 2009 Elsevier Ltd. All rights reserved.
Taggar G.K.,Punjab Agricultural University
Plant signaling & behavior | Year: 2012
Whitefly, Bemisia tabaci (Gennadius) (Hemiptera: Aleryrodidae), is a serious pest of black gram, (Vigna mungo (L.) Hepper), an important legume pulse crop grown in north India. This research investigated the potential role of selected plant oxidative enzymes in resistance/susceptibility to whitefly in nine black gram genotypes. Oxidative enzyme activity was estimated spectrophotometrically from leaf samples collected at 30 and 50 d after sowing (DAS) from whitefly infested and uninfested plants. The enzymes showed different activity levels at different times after the infestation. The results indicated that in general, whitefly infestation increased the activities of peroxidase and decreased the catalase activity. Resistant genotypes NDU 5-7 and KU 99-20 recorded higher peroxidase and catalase activities at 30 and 50 DAS under whitefly-stress conditions as compared with non-stressed plants. The results suggest that the enhanced activities of the enzymes may contribute to bioprotection of black gram plants against B. tabaci infestation. The potential mechanisms to explain the correlation of resistance to whitefly in black gram genotypes with higher activities of oxidative enzymes are also discussed.
Singh B.,Punjab Agricultural University
Journal of Entomology | Year: 2012
The pink stem borer, Sesamia inferens (Walker) (Lepidoptera: Noctuidae) is emerging as an important pest of wheat in India due to change in tillage system. It causes severe damage by forming dead hearts at seedling stage and white ears at ear-head stage. Studies were undertaken to know the effect of different tillage conditions and date of sowing on the incidence and damage caused by pink stem borer. The experiment was configurated in split block design with tillage conditions as main plot treatment and dates of sowing as sub plot treatment. Both tillage conditions and dates of sowing have significant effect on the incidence and damage caused of pink stem borer. However, effect of tillage conditions on yield was non-significant. Interaction of tillage conditions and dates of sowing indicated that there was no significant difference between two tillage conditions for pink stem borer incidence in the timely sown crop but it was higher in zero tillage if the crop was sown earlier or later than the recommended time period. © 2012 Academic Journals Inc.