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Monitoring of emerging new seed borne diseases of significance in ...

Monitoring of emerging new seed borne diseases of significance in ...

E. Seed

E. Seed Processing Chairman : Dr. D. C. Joshi, Dean, Agrl. Product Processing & Bio‐energy Convener : Dr. R.T. Kausal, PDKV, Akola Recommendation : Nil Experiment 1 : Optimum sieve size and type of screen for grading seeds of different crop varieties and hybrids including their parents. Objective : To standardize the sieve size and type of screen for grading seeds of different crop varieties and hybrids including their parents. NSP centre PDKV, Akola UAS, Bangalore UAS, Dharwad TNAU, Coimbatore HPKV, Palampur CSAUT, Kanpur MPKV, Rahuri SDAU, SKNagar UAS, Raichur CCSHAU, Hissar AAU, Anand Crop Chickpea, Pigeon pea, Paddy Sunflower, Redgram, Paddy Soybean, Pigeon pea, Sorghum (Rabi) Paddy, Blackgram Wheat, Mustard, Peas Wheat Sorghum (Rabi), Chickpea, Pearl millet Wheat, Greengram, Mustard Pigeonpea, Soybean Wheat, Greengram Wheat, Paddy, Greengram Treatments: 1. Crop : As above 2. Sieve sizes : 1. Top sieve: (as per MSCS) 2. Grading sieve: i) Recommended sieve (as per MSCS) ii) Two sieves above the recommended sieve iii) Two sieves below the recommended sieve Procedure: Unprocessed seed of the each crop variety will be procured from reliable source. Recommended size of top and bottom sieve will be used along with one or two sieve of above size and one or two sieve of below the size of recommended grading sieve. Seed material retained over each grading will be tested for observation on seed quality. Use a two‐screen air cleaner‐cum‐grader. Consider the material riding over the grading screen as product and that sinking through as reject. Brief description of the machine or experimental set‐up has to be reported. Observations 1. Recovery and rejection (%) 2. Seed size : Length, breadth and thickness (mm) 3. Germination (%) 4. Vigor index 5. Physical purity (%) 66 Proceedings 2012‐13

6. 1000/100‐seed weight (g) 7. Moisture content (%) 8. Mechanical damage (%) Experiment 2 : Management of mechanical damage at harvesting and threshing Objective : To study the management of mechanical damage due to different harvesting and threshing methods. NSP Centre TNAU, Coimbatore PDKV, Akola CSK HPKV, Palampur AAU, Anand UAS, Raichur Crop Paddy Chickpea, Soybean, Paddy Soybean Paddy Soybean Harvesting Methods: 1. Traditional method 2. Mechanical methods Procedure: The crop will be harvested by different methods i.e traditional and by mechanical. The crop will be threshed by multi‐crop thresher at 700 rpm in case of manually harvested / threshed seed and the use of combine harvester at 500 rpm and 700 rpm will be tested for seed quality parameters including mechanical damage. The field losses will be recorded in both the harvesting methods. Observations: 1. Mechanical injury (%) 2. Germination (%) 3. No. of abnormal seedling 4. Vigour index 5. No. of ODV Seeds 6. 100‐seed weight (gm) 7. Field loss per unit area before and after harvesting 8. Physical purity (%). Experiment 3: Studies on effectiveness of specific gravity separator for removal of ODV seeds. NSP Center TNAU, Coimbatore PDKV, Akola UAS, Bengaluru CCSHAU, Hissar CSK HPKV, Palampur PAJANCOA & RI, Karaikal Crop Paddy Paddy Pigeonpea Wheat Wheat Paddy Procedure: The crop seed will be processed on a modern seed processing plant using seed precleaner, seed grader, specific gravity separator arranged in series. The ODV seeds in raw paddy seed in each lot will be recorded. During processing, the sample will be collected from the outlet points of seed precleaner, seed Proceedings 2012‐13 67

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