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Articles by Sandhya Bahuguna
Total Records ( 5 ) for Sandhya Bahuguna
  Sandhya Bahuguna , Abhishek Bahuguna and Narendra Singh
  Phytotoxic effects of aqueous extracts of walnut leaf were studied on germinating seeds and early seedling growth of mustard (Brassica campestris cv. Karanti) under western Himalayan agri-silvi system. Five treatments comprised of distilled water (control), 40, 60, 80 and 100% concentration of leaf extracts were treated. The effect of aqueous extracts was found inhibitive with concentration dependent manner on seed germination and subsequent seedling growth. The variety exhibited extent of phytotoxicity at 100% extracts application in comparison to untreated control. Invariably there was a decrease in first count, germination, seedling root and shoot length, seedling fresh and dry weight with increasing aqueous extracts concentration on germinating mustard. Present investigation shows that the tree species have allelopathic potential and contain water-soluble substances. They have inhibitory effects at higher concentrations but at low concentrations they have stimulatory effects. Seed germination, seedling elongation and weights were determined on date of final count, however, other seedling vigor i.e., vigor index, speed of germination index, Relative Growth Index (RGI), Mean Daily Germination (MDG), Mean Germination Time (MGT) and time to 50% germination (T50) were calculated as per their respective formula. The significant reduction in seed germination and seedling vigor were observed of walnut leaf extracts on mustard (Brassica campestris). It was found that seed germination and seedling vigor of mustard were affected negatively by walnut leaf extracts in concentration dependent manner.
  Sandhya Bahuguna , Abhishek Bahuguna , Birendra Prasad and Narendra Singh
  A laboratory experiment was conducted to observe the effect of Juglans regia L. leaf extracts on germination and subsequent seedling growth of wheat (cv. VL-907) and barley (cv. PRB-502) under West Himalayan agri-silvi system. Eleven treatments comprised of distilled water 0 (Control), 10, 20, 30, 40, 50, 60, 70, 80, 90 and 100% concentration of leaf extracts were employed. The effect of aqueous extracts was found inhibitive indicating a direct proportional relationship with concentration dependent manner on seed germination and subsequent seedling growth of wheat. Invariably, there was a decrease in root, shoot as well as seedling length, fresh and dry weight of seedling and vigour index I and II with increasing walnut leaf extracts concentration on wheat. However, barley seed showed a considerable resistance against walnut leaf extract and no significant reduction and trend was observed for seed germination and subsequent seedling growth i.e., fresh and dry weight, vigour index I and II for different concentration of leaf extracts.
  Abhishek Bahuguna , B.K. Chaubey , Mayank Nautiyal , Sandhya Bahuguna and Bhagat Singh
  Phytotoxic effects of aqueous extracts of walnut leaf was studied on germinating seeds and early seedling growth of radish (Raphanus sativus L. cv. pusa chetki) under western Himalayan horti-silvi system. Radish seeds were treated with five treatments comprised of distilled water (Control), 40, 60, 80 and 100% concentration of leaf extracts. The effect of aqueous extracts was found inhibitive with concentration dependent manner on seed germination and subsequent seedling growth. The variety exhibited extent of phytotoxicity at 100% extracts application in comparison to untreated control. Invariably there was a decrease in first count, germination, seedling root and shoot length, seedling fresh and dry weight with increasing aqueous extracts concentration on germinating radish (psusa Chetki). Present investigation shows that the tree species have allelopathic potential and contain water-soluble substances. Seed germination, seedling elongation and weights were determined on date of final count, however, other seedling vigor i.e. vigor index, speed of germination index, Relative Growth Index (RGI), Mean Daily Germination (MDG), Mean Germination Time (MGT) and time to 50% germination (T50) were calculated as per their respective formula. The significant reduction in seed germination and seedling vigor were observed of walnut leaf extracts on radish. However, MGT and T50 is indicated as lower value for higher vigor were increased as the leaf extract concentration increased and found significantly lowest in control for radish. It was found that seed germination and seedling vigor of radish were affected negatively by walnut leaf extracts in concentration dependent manner.
  Abhishek Bahuguna , Bhagat Singh and Sandhya Bahuguna
  Pea (Pisum sativum L.) is an important cash crop and protein source for farmers in many parts of India and other countries. Just about 80% of the nitrogen necessity of pea comes from nitrogen obsession by Rhizobia, be relevant one-half pound of nitrogen per 1000 square foot area at seeding if the soil test shows the N-NO3 level below 5 ppm. This will help ensure nitrogen deficiency does not occur before nitrogen fascination occurs. Rhizobia immunization is muscularly recommended. It is used as foods tuff and the green unripe pods are cooked or conserved as vegetable. Therefore, field experiment was conducted under the field conditions at Institute of Medicinal and Aromatic Plants, Gairsain Campus, Uttarakhand University of Horticulture and Forestry during the winter season on 2013-2014 to find out the optimum levels of fertilizer on growth and yield attributes of vegetable pea, consisting two levels of nitrogen (20 and 40), three levels of phosphorus (30, 60 and 90) and three levels of potash (30, 60 and 90) along with control on vegetable pea in Randomized Block Design with three replications. The seeds were sown at a distance of 30x10 cm in plot size of 3.0x2.5 m in last week of November 2013. Full dose of phosphorus and potash and half dose of nitrogen were applied to each plot at the time of sowing on November 25, 2013. Days taken to germination, numbers of nodules per plant, fresh weight of nodules per plant, dry weight of nodules per plant, plant height (cm), days taken to first flowering, days taken to pod setting, number of pods per plant, number of grains per pod, fresh weight of 100 grains and yield ha-1 were significantly affected by the application of nitrogen phosphorus and potash. It was worth noting that 20 kg N ha-1, 90 kg P2O5 ha-1 and 60 kg K2O ha-1 yielded good result in number of grain per pod. Peas are highly nutritive and contain high content of digestible protein (7.2 g/100 g), carbohydrate (15.8 g), vitamin-C (9 mg), phosphorus (139 mg) and minerals.
  Sandhya Bahuguna , Abhishek Bahuguna and S. Ahmad
  Importance of neem products as insecticide, pesticides and herbicides is well recognized recently use of these products is insecticide in vegetables is being increased rapidly. Studies on seasonal incidence and effect of some neem products on Hadda beetle (Henosepilachna vigintioctopunctata fabr.) infested on Brinjal (Solanum melongena L.) were conducted at Allahabad Agricultural Institute-Deemed University, Allahabad during Rabi season 2006. The treatments of some commercial neem products viz. Neem Raj, Neemoria, Neem bark, Garlic, Neem Gold, Neem Seed Kernel Extract (NSKE), Neem leaf, Achook and one insecticide, i.e., Endosulfan were applied. The observation pertaining to the population of Hadda beetle on brinjal were recorded one day before treatments; the observation on the population mortality were recorded at 1, 2 and 5 days after treatments. The beetle population appeared in the 1st week of March (10th standard week) with an average population level of 0.1 beetle/leaf. Hadda beetle population gradually increased and reached peak level of 3.64 per leaf upto 3rd week of April (16th standard week). However, the population declined with maturation of the crop. Endosulfan was the most effective treatment with 100% mortality. All the other treatments were also effective at 5 days after spraying and they were also statistically at par with each other. Declined of beetle population was not much dependent on weather parameters (temperature, wind velocity, rainfall and relative humidity) but was influenced by the maturation of crop. The present study recommends that Endosulfan (0.07%) as the most effective treatment to control Hadda beetle infestation in Brinjal.
 
 
 
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