Some Effects of Pre-harvest Fungicide Applications on Sorghum (Sorghum Bicolor (L.) Moench) Seed Quality PDF Download
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Author: Reshed M. Ali
Publisher:
ISBN:
Category : Fungicides
Languages : en
Pages : 98
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Author: Reshed M. Ali
Publisher:
ISBN:
Category : Fungicides
Languages : en
Pages : 98
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Author: M. D. Bhatt
Publisher:
ISBN:
Category :
Languages : pt-BR
Pages : 160
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The field experiment with ' Cosor 5' variety of sorghum was conducted in the Central Experiment Station of UPLB starting from the third week of April 1984. The crop experienced high Rh (78 average) from flowering to seed maturity. One systemic fungicide, out of four kinds, was applied to each plot two weeks before flowering, at flowering and two weeks after flowering to control fungal infection in developing seeds. Seed dry matter accumulation, moisture content, vaibility and vigor were studied at regular intervals starting two weeks after flowering. Seed health and other characteristics were assessed at harvest and the different seed lots were stored under ambient open storape for the succeeding six months to study deterioration every month through the test of germination, AAT, GADA, MC and speed of germination. During storage, germination decreased from an initial 90 percent to 73 percent. Seedsfrom plants sprayed two weeks before, followed by at flowering consistently exhibited higher viability. On the average, a 34 percent loss in viability was observed during storage period as indicated by AAT. Significantly higher germination in AAT only during the later half of thestorage period was shown by seeds obtained from plants sprayed at theearlier two stages. Benomyl and Carboxin treatments as preharvest sprays resulted in better protection from seed-borne fungi as well as in better quality seeds on viability, vigor and storage life. Seeds obtained from the firtsstage of spraying were the in over all performace followed by those from the second spraying stage. The sprays were applied only once and the results were not consistently encouraging in all aspects, thus, it is advisable to apply the systemic fungicides more thanonce. Based on the results of this experiment, the following can be recommended for farmers, seed producers and for further studies. The residual dormancy prevalent in this variety could be over-come by treating seeds at 40 C for six days. Pre-harvest fungicides suitable againstabove mentioned fungi should be applied during the stages: two weeks before flowering (at the emergence of the ear), and at flowering.
Author: B.M. Deo
Publisher:
ISBN:
Category :
Languages : en
Pages : 80
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"Cosor 5" Sorghum was grown from April to August 1984 under UPLB condition to have the stage of physiological maturity (PM) coincide with high relative humidity (RH). Five treatments of systemic fungicides namely: Benomyl (50% a.i.) 0.05%, Mancozeb (72% a.i.) 0.25%, Oxycarboxin (20% a.i.) 0.4%, Carboxin (75% a.i.) 0.3% were applied two weeks before flowering, at flowering and two weeks after flowering. Seed characterization were studied starting from flowering up to six months after harvest. Fourteen days after anthesis seeds were able to germinate. Seed dry matter accumulation was highest 34 days after flowering (d.a.f.) with 31 percent moisture content. Germination at PM was 34 percent and its speed index was 4.5. At harvest, germination increased to 51 percent in the standard germination test, and 84 percent after accelerated ageing test (AAT). Under a light bank, seedling emergence was 73 percent. Speed of germination at harvest averaged 16. Evidences indicated that the seeds underwent after ripening which could be overcome by exposure to 40oC for six days. Seeds at harvest were found to be infected with 13 kinds if fungi among which Curvularia spp, Fusarium moniliforme, Ascochyta sorghina were predominant. Preharvest fungicide application decreased fungal infection by five to seven percent. Spraying two weeks before flowering and at flowering, gave better seed protection against fungi. Within the six months storage period the seeds lost viability by 17 percent in standard germination test and 34 (...).
Author: Apporture Kouamé Kouakou
Publisher:
ISBN:
Category : Grain
Languages : en
Pages : 168
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Author: Jose A. Yau Q
Publisher:
ISBN:
Category : Fungicides
Languages : en
Pages : 78
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Author: Ahmed A. Aziz
Publisher:
ISBN:
Category : Seeds
Languages : en
Pages : 160
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![Effects of Chemical Desiccation and Early Harvesting on Sorghum [Sorghum Bicolor (L.) Moench] Seed Germination PDF](https://books.google.com/books/content/images/frontcover/5oDatwAACAAJ?fife=w80-h100)
Author: Sergio Gouveia
Publisher:
ISBN:
Category :
Languages : en
Pages : 162
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Author: Mississippi State University
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 452
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Author: YOGISHA SHANBHOGUE M
Publisher:
ISBN:
Category :
Languages : en
Pages : 212
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Author: Mitchell Memorial Library
Publisher:
ISBN:
Category :
Languages : en
Pages : 454
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