Dr. B. Ashok kumar | Mallareddy (original) (raw)
Papers by Dr. B. Ashok kumar
Current Agriculture Research Journal, 2017
The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quali... more The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quality of Tomato fruits (Solanum lycopersicon L.). The mature green tomato fruits were subjected to aqueous solution of ethephon 39%SL @ 1500, 2000, 2500, 3000 and 3500 ppm to record the data on colour development of fruit. Colour of fruits was observed to be improved with ethephon applications and maximized yellow colour development was noticed from 5th day of ripening period. The weight loss higher with concentration of ethephon and ripening interval. Upto 7th day of treatment fruit not showed any symptoms of rotting. But fruit firmness gradually reduced with advancement of storage in the treatments and at 3500ppm ethephon 39%SL treatment. The quality of fruit especially lycopene and TSS content increased with advancement of ripening period. Treatment with ethephon 39%SL @ 2500 ppm resulted in adequate ripening of fruits with uniform red colour, acceptable quality and better than all treat...
Current Agriculture Research Journal, 2017
The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quali... more The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quality of Tomato fruits (Solanum lycopersicon L.). The mature green tomato fruits were subjected to aqueous solution of ethephon 39%SL @ 1500, 2000, 2500, 3000 and 3500 ppm to record the data on colour development of fruit. Colour of fruits was observed to be improved with ethephon applications and maximized yellow colour development was noticed from 5th day of ripening period. The weight loss higher with concentration of ethephon and ripening interval. Upto 7th day of treatment fruit not showed any symptoms of rotting. But fruit firmness gradually reduced with advancement of storage in the treatments and at 3500ppm ethephon 39%SL treatment. The quality of fruit especially lycopene and TSS content increased with advancement of ripening period. Treatment with ethephon 39%SL @ 2500 ppm resulted in adequate ripening of fruits with uniform red colour, acceptable quality and better than all treat...
International Journal of Bio-resource and Stress Management, 2017
The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studie... more The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studied by comparing grafted plants with nongrafted ones under low cost polyhouse. The present investigation was carried out in the year, 2014-15, Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry (CAU) Pasighat. The experiment was laid out in Completely Randomised Design with 8 treatments (four wild Solanum species and two eggplant genotypes) and four replications. The seedlings of eggplant genotypes with pencil thickness were grafted with wild Solanum species by cleft method. The non-grafted plants were used as control. The highest survival rate observed in plants grafted with Solanum torvum followed by Solanum surathense. The plant morphology, reproductive and yield parameters were significantly affected by grafting. Control plants recorded minimum plant height with least number of leaves per plant. Furthermore, fruit weight, fruit yield, days to fruit maturity and rooting behaviour of plant were influenced positively by grafting. All grafted plants showed superior rooting and highest number, length, fresh weight and dry weight of roots were recorded in Solanum torvum followed by solanum khasianum. Based on mean performance, grafted plants of Solanum torvum and Solanum khasianum found to be superior for plant growth and yield attributing characters without effecting fruit quality. So, it can be concluded that grafting in eggplant is quite successful and alternate method of production.
The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quali... more The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quality of Tomato fruits (Solanum lycopersicon L.). The mature green tomato fruits were subjected to aqueous solution of ethephon 39%SL @ 1500, 2000, 2500, 3000 and 3500 ppm to record the data on colour development of fruit. Colour of fruits was observed to be improved with ethephon applications and maximized yellow colour development was noticed from 5th day of ripening period. The weight loss higher with concentration of ethephon and ripening interval. Upto 7th day of treatment fruit not showed any symptoms of rotting. But fruit firmness gradually reduced with advancement of storage in the treatments and at 3500ppm ethephon 39%SL treatment. The quality of fruit especially lycopene and TSS content increased with advancement of ripening period. Treatment with ethephon 39%SL @ 2500 ppm resulted in adequate ripening of fruits with uniform red colour, acceptable quality and better than all treatments of ethephon.
The present investigation entitled "Response of capsicum (Capsicum annuum L. var. grossum) to dif... more The present investigation entitled "Response of capsicum (Capsicum annuum L. var. grossum) to different levels of spacing and training system under foot hills of Arunachal Pradesh". The experiment was laid out in two factorial RBD using three replications with three levels of spacing and training. The standard cultural practices were done regular interval for better crop growth and good yields. The closer spacing resulted in maximum plant height, LAI, and total yield per plot and wider spacing recorded maximum number of branches, number of leaf, earliness in fruit flowering and fruit set and yield per plant. Among all levels, two shoot training showed maximum plant height, minimum days required to first flowering, first fruit set, days to first harvest and size of fruit and four shoots resulted in maximum number of branches, number of leaf, LAI, fruits per plant (10.06), yield per plant (0.54 kg) and yield (0.75 Kg/m 2). Among all interactions, closer spacing with four shoot training produced more number of branches and leaves per plant resulted in maximum of per plant and per plot yield due to more number of shoots contributed in producing more number of fruits. In contrast, wider spacing with two shoot training produced highest plant height, early flowering and fruit set. The quality parameters and fruiting percentage had not significant to interaction of both training and spacing. It is concluded that for higher yield of capsicum under polyhouse conditions, the closer spacing with four shoots training maybe suggested for foot hills of Himalayas. Highlights m Four shoots with closer spacing positively correlated with yield per unit area but wider spacing and less no. of shoots produced higher yield per plant.
Abstract- Now a day’s Grafting is regarded as a rapid alternative tool to the relatively slow bre... more Abstract- Now a day’s Grafting is regarded as a rapid alternative tool to the relatively slow breeding methodology. To increase domestic and sustainable vegetable production grafting is a new technology by using resistant rootstock to improve yield and quality of produce. It was first started in Japan & Korea and Efforts are being made in AVRDC to improve production in the Asian lowland tropics. Currently most watermelon, cucumber and various solanaceae crops are grafted before being transplanted in the green house or in the field. The purpose of grafting also has been greatly expanded to various type of stress tolerance, increasing plant vigor, yield and duration of crop. Vegetable grafting has potential to promote cultivation of the vegetables under non-traditional conditions and frazile agro-eco-systems. Focus on enhancing the capacity of vegetable production and consumption to reduce malnutrition by adopting some innovations.
Solasodine a glyco-alkaloid and nitrogen containing steroidal drug (aglycone), obtained from dist... more Solasodine a glyco-alkaloid and nitrogen containing steroidal drug (aglycone), obtained from distinctive species of the genus Solanum (Solanaceae). The Completely Randomized Design (CRD), method used for statistical analysis. The spectrometric method was used to evaluate the phytoconstituents of crude extract of dried fruits. The phytochemical content recorded highest in grafted plants as compared to non grafted eggplant genotypes. The results of grafted plants and non grafted eggplant varieties were recorded for solasodine content, total phenols and poly phenol oxidase (PPO) content had significant to each other. The solasodine content observed highest (1.66 mg/100gm) in grafted plants of Solanum xanthocarpum × Pusa Shyamala, followed by Solanum xanthocarpum × pusa hybrid-6 and the lowest 0.92 mg/100gm in non grafted eggplant genotypes. The both polyphenols and polyphenol oxidase (PPO) content were recovered maximum in grafted plants and among grafted plants Solanum xanthocarpum produced 59.69mg/100gm and 3.9OD min-1.mg-1. Based on mean performance Solanum xanthocarpum and Solanum khasianum found superior for phytochemical content and can be used as alternative for modern medicine.
Key words: Phytochemicals, Glycoalkaloid, Grafting, Solanum sps., Crude extract.
The present investigation carried out to check the Bio-efficacy study of Physio-activator (optein... more The present investigation carried out to check the Bio-efficacy study of Physio-activator (opteine) on eggplant cv. Pathakatta. The test product applied as foliar spray with seven different treatments i.e. 400ml, 500ml, 600ml, 7500ml, 1250ml/ha, control and Biozyme. The statistical analysis was done using Randomized Block Design (RBD) with three replications and seven treatments. It was noticed in the experiment that application of opteine enhanced the crop growth and promoted reproductive growth in later stages of crop compared to control plants. Amongst the different concentration of opteine it was observed that when the plant is sprayed with concentration of 600 ml/ha increased yield attributing characters such as number of fruits, fruit diameter and fruit weight ultimately fruit yield increased. The other parameters like plant height, number of branches, days to fruit set and days to first harvest shows positive effect with the application opteine @ 750 ml/ha. The fruit quality parameters like Anthocynin content was also influenced significantly with application of different concentration of opteine. It may be concluded from the present investigation that the application of Physio activator (opteine) as a foliar spray was found highly economical for brinjal production.
The present investigation conducted in the year 2016-2017 to check Bio-efficacy study of physioac... more The present investigation conducted in the year 2016-2017 to check Bio-efficacy study of physioactivator (opteine) on tomato cv. PAN 1286. The test product applied as foliar spray with seven different treatments i.e. 400ml, 500ml, 600ml, 7500ml, 1250ml/ha, control and Biozyme. The statistical analysis was done using Randomized Block Design (RBD) with three replications. From the results it was concluded that application of opteine increased total and marketable yield. The application of opteine showed positive effect with respect to vegetative, reproductive yield and quality parameters compared to water and biozyme spray. Amongst different concentrations, opteine spray of 600 ml/ha produced highest fruit weight, fruit yield, fruit diameter, number of fruits per plant and minimum days to fruit set. The dose of 750 ml/ha of opteine found better for plant height, number of branches. The fruit quality parameters like lycopene, anthocynin, TSS, beta carotene and total sugar content were also influenced with application of opteine. It was concluded that sea weed extract application enhanced crop growth and ultimately increased fruit yield.
The experiment was carried out under polyhouse conditions in plains of West Bengal during 2016-17... more The experiment was carried out under polyhouse conditions in plains of West Bengal during 2016-17 and 2017-18 to standardize vegetable based cropping sequence under integrated nutrient management system. It is concluded that crop nutrients mandatory to apply in the form rational integration of fertilizers and organic manures to obtain monetary margins from cultivation with reference to soil health. The integration of 50% recommended doses through fertilizers and poultry manure @ 1.00 kg sq m-1 gave the best result with respect to maintain intact soil health. However, application of FYM @ 2.50 kg sq m-1 or vermicompost @ 1.00 kg sq m-1 instead of poultry manure also can be recommended in this regard. It can be summarize that cropping sequence of Tomato-Palak-Cucumber and Palak-Early cauliflower-Capsicum Sequence with L2 (Application of 50% recommended doses of fertilizer + Poultry manure @ 1.00 kg sq m-1) type of nutrient management best suited under protected conditions.
The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studie... more The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studied by comparing grafted plants with nongrafted ones under low cost polyhouse. The present investigation was carried out in the year, 2014-15, Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry (CAU) Pasighat. The experiment was laid out in Completely Randomised Design with 8 treatments (four wild Solanum species and two eggplant genotypes) and four replications. The seedlings of eggplant genotypes with pencil thickness were grafted with wild Solanum species by cleft method. The non-grafted plants were used as control. The highest survival rate observed in plants grafted with Solanum torvum followed by Solanum surathense. The plant morphology, reproductive and yield parameters were significantly affected by grafting. Control plants recorded minimum plant height with least number of leaves per plant. Furthermore, fruit weight, fruit yield, days to fruit maturity and rooting behaviour of plant were influenced positively by grafting. All grafted plants showed superior rooting and highest number, length, fresh weight and dry weight of roots were recorded in Solanum torvum followed by solanum khasianum. Based on mean performance, grafted plants of Solanum torvum and Solanum khasianum found to be superior for plant growth and yield attributing characters without effecting fruit quality. So, it can be concluded that grafting in eggplant is quite successful and alternate method of production.
Current Agriculture Research Journal, 2017
The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quali... more The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quality of Tomato fruits (Solanum lycopersicon L.). The mature green tomato fruits were subjected to aqueous solution of ethephon 39%SL @ 1500, 2000, 2500, 3000 and 3500 ppm to record the data on colour development of fruit. Colour of fruits was observed to be improved with ethephon applications and maximized yellow colour development was noticed from 5th day of ripening period. The weight loss higher with concentration of ethephon and ripening interval. Upto 7th day of treatment fruit not showed any symptoms of rotting. But fruit firmness gradually reduced with advancement of storage in the treatments and at 3500ppm ethephon 39%SL treatment. The quality of fruit especially lycopene and TSS content increased with advancement of ripening period. Treatment with ethephon 39%SL @ 2500 ppm resulted in adequate ripening of fruits with uniform red colour, acceptable quality and better than all treat...
Current Agriculture Research Journal, 2017
The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quali... more The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quality of Tomato fruits (Solanum lycopersicon L.). The mature green tomato fruits were subjected to aqueous solution of ethephon 39%SL @ 1500, 2000, 2500, 3000 and 3500 ppm to record the data on colour development of fruit. Colour of fruits was observed to be improved with ethephon applications and maximized yellow colour development was noticed from 5th day of ripening period. The weight loss higher with concentration of ethephon and ripening interval. Upto 7th day of treatment fruit not showed any symptoms of rotting. But fruit firmness gradually reduced with advancement of storage in the treatments and at 3500ppm ethephon 39%SL treatment. The quality of fruit especially lycopene and TSS content increased with advancement of ripening period. Treatment with ethephon 39%SL @ 2500 ppm resulted in adequate ripening of fruits with uniform red colour, acceptable quality and better than all treat...
International Journal of Bio-resource and Stress Management, 2017
The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studie... more The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studied by comparing grafted plants with nongrafted ones under low cost polyhouse. The present investigation was carried out in the year, 2014-15, Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry (CAU) Pasighat. The experiment was laid out in Completely Randomised Design with 8 treatments (four wild Solanum species and two eggplant genotypes) and four replications. The seedlings of eggplant genotypes with pencil thickness were grafted with wild Solanum species by cleft method. The non-grafted plants were used as control. The highest survival rate observed in plants grafted with Solanum torvum followed by Solanum surathense. The plant morphology, reproductive and yield parameters were significantly affected by grafting. Control plants recorded minimum plant height with least number of leaves per plant. Furthermore, fruit weight, fruit yield, days to fruit maturity and rooting behaviour of plant were influenced positively by grafting. All grafted plants showed superior rooting and highest number, length, fresh weight and dry weight of roots were recorded in Solanum torvum followed by solanum khasianum. Based on mean performance, grafted plants of Solanum torvum and Solanum khasianum found to be superior for plant growth and yield attributing characters without effecting fruit quality. So, it can be concluded that grafting in eggplant is quite successful and alternate method of production.
The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quali... more The present experiment was undertaken to study the effect of ethephon 39%SL on post-harvest quality of Tomato fruits (Solanum lycopersicon L.). The mature green tomato fruits were subjected to aqueous solution of ethephon 39%SL @ 1500, 2000, 2500, 3000 and 3500 ppm to record the data on colour development of fruit. Colour of fruits was observed to be improved with ethephon applications and maximized yellow colour development was noticed from 5th day of ripening period. The weight loss higher with concentration of ethephon and ripening interval. Upto 7th day of treatment fruit not showed any symptoms of rotting. But fruit firmness gradually reduced with advancement of storage in the treatments and at 3500ppm ethephon 39%SL treatment. The quality of fruit especially lycopene and TSS content increased with advancement of ripening period. Treatment with ethephon 39%SL @ 2500 ppm resulted in adequate ripening of fruits with uniform red colour, acceptable quality and better than all treatments of ethephon.
The present investigation entitled "Response of capsicum (Capsicum annuum L. var. grossum) to dif... more The present investigation entitled "Response of capsicum (Capsicum annuum L. var. grossum) to different levels of spacing and training system under foot hills of Arunachal Pradesh". The experiment was laid out in two factorial RBD using three replications with three levels of spacing and training. The standard cultural practices were done regular interval for better crop growth and good yields. The closer spacing resulted in maximum plant height, LAI, and total yield per plot and wider spacing recorded maximum number of branches, number of leaf, earliness in fruit flowering and fruit set and yield per plant. Among all levels, two shoot training showed maximum plant height, minimum days required to first flowering, first fruit set, days to first harvest and size of fruit and four shoots resulted in maximum number of branches, number of leaf, LAI, fruits per plant (10.06), yield per plant (0.54 kg) and yield (0.75 Kg/m 2). Among all interactions, closer spacing with four shoot training produced more number of branches and leaves per plant resulted in maximum of per plant and per plot yield due to more number of shoots contributed in producing more number of fruits. In contrast, wider spacing with two shoot training produced highest plant height, early flowering and fruit set. The quality parameters and fruiting percentage had not significant to interaction of both training and spacing. It is concluded that for higher yield of capsicum under polyhouse conditions, the closer spacing with four shoots training maybe suggested for foot hills of Himalayas. Highlights m Four shoots with closer spacing positively correlated with yield per unit area but wider spacing and less no. of shoots produced higher yield per plant.
Abstract- Now a day’s Grafting is regarded as a rapid alternative tool to the relatively slow bre... more Abstract- Now a day’s Grafting is regarded as a rapid alternative tool to the relatively slow breeding methodology. To increase domestic and sustainable vegetable production grafting is a new technology by using resistant rootstock to improve yield and quality of produce. It was first started in Japan & Korea and Efforts are being made in AVRDC to improve production in the Asian lowland tropics. Currently most watermelon, cucumber and various solanaceae crops are grafted before being transplanted in the green house or in the field. The purpose of grafting also has been greatly expanded to various type of stress tolerance, increasing plant vigor, yield and duration of crop. Vegetable grafting has potential to promote cultivation of the vegetables under non-traditional conditions and frazile agro-eco-systems. Focus on enhancing the capacity of vegetable production and consumption to reduce malnutrition by adopting some innovations.
Solasodine a glyco-alkaloid and nitrogen containing steroidal drug (aglycone), obtained from dist... more Solasodine a glyco-alkaloid and nitrogen containing steroidal drug (aglycone), obtained from distinctive species of the genus Solanum (Solanaceae). The Completely Randomized Design (CRD), method used for statistical analysis. The spectrometric method was used to evaluate the phytoconstituents of crude extract of dried fruits. The phytochemical content recorded highest in grafted plants as compared to non grafted eggplant genotypes. The results of grafted plants and non grafted eggplant varieties were recorded for solasodine content, total phenols and poly phenol oxidase (PPO) content had significant to each other. The solasodine content observed highest (1.66 mg/100gm) in grafted plants of Solanum xanthocarpum × Pusa Shyamala, followed by Solanum xanthocarpum × pusa hybrid-6 and the lowest 0.92 mg/100gm in non grafted eggplant genotypes. The both polyphenols and polyphenol oxidase (PPO) content were recovered maximum in grafted plants and among grafted plants Solanum xanthocarpum produced 59.69mg/100gm and 3.9OD min-1.mg-1. Based on mean performance Solanum xanthocarpum and Solanum khasianum found superior for phytochemical content and can be used as alternative for modern medicine.
Key words: Phytochemicals, Glycoalkaloid, Grafting, Solanum sps., Crude extract.
The present investigation carried out to check the Bio-efficacy study of Physio-activator (optein... more The present investigation carried out to check the Bio-efficacy study of Physio-activator (opteine) on eggplant cv. Pathakatta. The test product applied as foliar spray with seven different treatments i.e. 400ml, 500ml, 600ml, 7500ml, 1250ml/ha, control and Biozyme. The statistical analysis was done using Randomized Block Design (RBD) with three replications and seven treatments. It was noticed in the experiment that application of opteine enhanced the crop growth and promoted reproductive growth in later stages of crop compared to control plants. Amongst the different concentration of opteine it was observed that when the plant is sprayed with concentration of 600 ml/ha increased yield attributing characters such as number of fruits, fruit diameter and fruit weight ultimately fruit yield increased. The other parameters like plant height, number of branches, days to fruit set and days to first harvest shows positive effect with the application opteine @ 750 ml/ha. The fruit quality parameters like Anthocynin content was also influenced significantly with application of different concentration of opteine. It may be concluded from the present investigation that the application of Physio activator (opteine) as a foliar spray was found highly economical for brinjal production.
The present investigation conducted in the year 2016-2017 to check Bio-efficacy study of physioac... more The present investigation conducted in the year 2016-2017 to check Bio-efficacy study of physioactivator (opteine) on tomato cv. PAN 1286. The test product applied as foliar spray with seven different treatments i.e. 400ml, 500ml, 600ml, 7500ml, 1250ml/ha, control and Biozyme. The statistical analysis was done using Randomized Block Design (RBD) with three replications. From the results it was concluded that application of opteine increased total and marketable yield. The application of opteine showed positive effect with respect to vegetative, reproductive yield and quality parameters compared to water and biozyme spray. Amongst different concentrations, opteine spray of 600 ml/ha produced highest fruit weight, fruit yield, fruit diameter, number of fruits per plant and minimum days to fruit set. The dose of 750 ml/ha of opteine found better for plant height, number of branches. The fruit quality parameters like lycopene, anthocynin, TSS, beta carotene and total sugar content were also influenced with application of opteine. It was concluded that sea weed extract application enhanced crop growth and ultimately increased fruit yield.
The experiment was carried out under polyhouse conditions in plains of West Bengal during 2016-17... more The experiment was carried out under polyhouse conditions in plains of West Bengal during 2016-17 and 2017-18 to standardize vegetable based cropping sequence under integrated nutrient management system. It is concluded that crop nutrients mandatory to apply in the form rational integration of fertilizers and organic manures to obtain monetary margins from cultivation with reference to soil health. The integration of 50% recommended doses through fertilizers and poultry manure @ 1.00 kg sq m-1 gave the best result with respect to maintain intact soil health. However, application of FYM @ 2.50 kg sq m-1 or vermicompost @ 1.00 kg sq m-1 instead of poultry manure also can be recommended in this regard. It can be summarize that cropping sequence of Tomato-Palak-Cucumber and Palak-Early cauliflower-Capsicum Sequence with L2 (Application of 50% recommended doses of fertilizer + Poultry manure @ 1.00 kg sq m-1) type of nutrient management best suited under protected conditions.
The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studie... more The effect of different rootstocks on eggplant growth, fruit yield, and fruit quality were studied by comparing grafted plants with nongrafted ones under low cost polyhouse. The present investigation was carried out in the year, 2014-15, Experimental Farm, Department of Vegetable Science, College of Horticulture and Forestry (CAU) Pasighat. The experiment was laid out in Completely Randomised Design with 8 treatments (four wild Solanum species and two eggplant genotypes) and four replications. The seedlings of eggplant genotypes with pencil thickness were grafted with wild Solanum species by cleft method. The non-grafted plants were used as control. The highest survival rate observed in plants grafted with Solanum torvum followed by Solanum surathense. The plant morphology, reproductive and yield parameters were significantly affected by grafting. Control plants recorded minimum plant height with least number of leaves per plant. Furthermore, fruit weight, fruit yield, days to fruit maturity and rooting behaviour of plant were influenced positively by grafting. All grafted plants showed superior rooting and highest number, length, fresh weight and dry weight of roots were recorded in Solanum torvum followed by solanum khasianum. Based on mean performance, grafted plants of Solanum torvum and Solanum khasianum found to be superior for plant growth and yield attributing characters without effecting fruit quality. So, it can be concluded that grafting in eggplant is quite successful and alternate method of production.