Seed Health Management for Better Productivity - Govind Ballabh ...

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(Seed Health Management for Better Productivity)1. Agarwal, V.K. (1981). Seed-borne fungi and viruses of some important crops. Research Bulletin108. Directorate of Experiment Station G.B. Pant Univ. of Agril. & Tech. Pantnagar.2. Haware, M.P., and Y.L. Nene, and R. Rejeshwari (1978). Eradication of Fusarium oxysprorum f.sp. ciceri transmitted in chickpea seed. Phytopathology 68: 1364-1367.3. Haware M.P., Y.L. Nene and S.B. Mathur (1986). Seed-borne diseases of chickpea. Technicalbulletin from the Danish Government institute of seed pathology for developingcountries. copenhagen, denmark No. 1. In collaboration with international cropsresearch institute for the semi-arid tropics (ICRISAT)4. Luthra, J.C., and k.S. Bedi Bedi (1932). Some preliminary studies on gram blight with reference toits cause and mode of perennation. Indian Journal of agricultural Science 2: 499-512.5. Maden, S., D. Singh, S.B. Mathur, abd P. Neergaard (1975). Detection and location of seedborneinoculum of Ascochyta rabiei and its transmission in chickpea (Cicer arietinum).Seed Science and Technology 3: 667-681.6. Nene, Y. L. (1980). A World List of Pigeonpea (Cajanus cajan (L.) Millsp.) and Chickpea (Cicerarietinum L.) Pathogens. ICRISAT Pulse Pathology Progress Report no. 8: 1-14.7. Nene, Y. L. (1972). A Survey of Viral Diseases of Pulse crops in Uttar Pradesh. Research BulletinNo. 4 Directorate of Experiment Station G.B. Pant Univ. of Agril. & Tech. Pantnagar.- 116 -
(Seed Health Management for Better Productivity)Role of Cultural Practices on the Management of Seed Borne DiseasesR.P. AwasthiDepartment of Plant Pathology, G.B.P.U.A.&T., Pantnagar-263145 (Uttarakhand)The life cycle of a plant begins with the introduction of seed germination in soil andultimately ends up with the seed production. During different stages of life cycle, a seed passesthrough many stages of growth from germination and emergence of a tender seedling to profusevegetablegrowth, and subsequently, bearing flowers, fruits and ultimately the seed. Duringdifferent stages of plant, growth, the plant interacts with number of pathogens/ microorganisms.At different seed development stages of plant, commencing from flowering to seedmaturation, a number of microorganisms including viruses may enter and establish a pathogenicrelationship within the seed tissue. Once the seed is infected, it may serve as a carrier of thepathogen or as a consequence of infection; the seed itself may be victimized or killed.The microorganism such as fungi, bacteria and nematodes including viruses may be bornein the seed or carried on the surface of the seed or may be admixtured with the seed duringharvesting or threshing processes. What so ever may be the location of infection in seed, themechanism of seed infection is very much influenced by the environmental conditions during seed/crop development stages.Many different types of control methods aim at eradicating or reducing the amount of pathogenpresent in an area, a plant, or plant parts (such as seeds). Many such methods are cultural, that is,they depend primarily on certain actions of growers, such as host eradication, crop rotation, sanitation,improving plant growing conditions, creating conditions unfavourable to pathogens, polythenemulching, trickle irrigation, ecofallow, and, sometimes reduced tillage farming.Selection of seed production areasSeed should be produced in areas where the pathogens of major concerns are unable toestablish or maintain themselves at critical levels during period of seed development. Area withlow rainfall and low relative humidity generally are favourable for production of high quality seedswith low inoculum levels. Moderately cool climate, with dry summers, is ideal for production of highquality cabbage seeds relatively free of Xanthmonas campestris pv. campestris and Leptospheriamaculans. Area with low rainfall during boll opening of cotton is best for cottonseed production asthere is reduced infection by Alternaria alternata, Diplodia gossypina, Fusarium oxysporum, F.roseum, Glomerella gossypii and Nigrospora sphaerica.Selection of high quality seedsPlanting seeds should be free of the pathogen as possible. Seed should come from acarefully maintained, generally pure block and should be in selected production fields. They shouldbe cleaned commercially and treated chemically or non- chemically.Seeding Rate- 117 -
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potential. An improvement in qualit
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9. Session Arrangement CommitteeDr.
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9. Dr. Pradip Kumar BorahSr. Scient
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TRAININGONANNEXURE-IIISEED HEALTH M
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ANNEXURE-IVCENTRE OF ADVANCED STUDI
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SundayApril 6MondayApril 7TuesdayAp
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