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Sujatha, K.
- Antifungal Activity of Brown, Red and Green Alga Seaweed Extracts against Macrophomina phaseolina (Tassi) Goid., in Pigeonpea var. CO (Rg) 7
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Authors
S. Ambika
1,
K. Sujatha
1
Affiliations
1 Department of Seed Science and Technology, Agricultural College and Research Institute, MADURAI (T.N.), IN
1 Department of Seed Science and Technology, Agricultural College and Research Institute, MADURAI (T.N.), IN
Source
International Journal of Agricultural Sciences, Vol 11, No 2 (2015), Pagination: 210-216Abstract
In vitro studies was conducted to evaluate the effect of seaweed extracts of Caulerpa racemosa (green alga), Sargassum myricocystum (brown alga) and Gracilaria edulis (red alga) against the mycelial growth of Macrophomina phaseolina at different concentrations of 10, 15, 20, 25 and 30 per cent along with control by poison food technique. The result revealed that extract of S. myricocystum showed significant antifungal activity against pathogen followed by G. edulis and C. racemosa. S. myricocystum (30%) extract recorded the lowest mycelial growth (45.2, 50.6, 58.4 and 61.5 mm) at 24, 48, 72 and 96 hrs after incubation. Among the antagonists tested against Macrophomina phaseolina, the fungal antagonists Trichoderma viride was found to be most effective in reducing the mycelial growth than the bacterial antagonist Pseudomonas fluorescens. Both the antagonistic of fungi and bacteria has compatability with seaweed extracts in all the concentrations.Keywords
Seaweeds, Soil Borne Pathogen, Red Gram, Macrophomina phaseolina.
- Seed Development and Maturation Studies In Barnyard Millet Cv. MDU 1
Abstract Views :163 |
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Authors
Affiliations
1 Department of Seed Science and Technology, Agricultural College and Research Institute, Madurai (T.N.), IN
1 Department of Seed Science and Technology, Agricultural College and Research Institute, Madurai (T.N.), IN
Source
International Journal of Agricultural Sciences, Vol 14, No 2 (2018), Pagination: 362-366Abstract
The present investigation was carried out during 2016-2017 to identify the seed development maturation studies in Barnyard millet cv. MDU 1. The results revealed that seeds attained physiological maturity on 50 days after anthesis as evidenced by the maximum panicle length (30.7 cm), fresh weight (31.2 g), dry weight (23.5g), fresh weight of the seeds (23.4g) and dry weight of the seeds (14.5g). The change of colour of panicle and seed from green to dark brown could be considered as a visible index of maturity. The seed quality parameters viz., germination (51 %), shoot length (9.59 cm), ischolar_main length (18.5 cm) and dry matter (0.025 g/10 seedlings) and vigour index (1175) were also maximum at 50 days after anthesis.Keywords
Barnyard Millet, Seed Development, Physiological Maturity, Anthesis.References
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