Seed treatment methods and duration effects of germination of wild sunflower
2000
Akinola, J.O. | Larbi, A. | Farinu, G.O. | Odunsi, A.A.
The effects were evaluated of six methods and six durations of seed treatment on the germination of wild sunflower (Tithonia diversifolia) seeds. The treatments were as follows: (1) hot water at 80 degrees C, (2) hot water at 100 degrees C, (3) oven-drying at 80 degrees C, (4) oven-drying at 100 degrees C, (5) immersion in concentrated sulphuric acid and (6) immersion in 10% hydrogen peroxide. The durations were 0, 2.5, 5, 10, 15 and 20 min. Treatment with hot water at 80 or 100 degrees C for 11-14 min, and oven-drying at 100 degrees C for 20 min all resulted in more than 65% germination 10 d after treatment. Oven-drying at 80 degrees C, immersion in concentrated sulphuric acid and in 10% hydrogen peroxide resulted in less than 50% germination. Based on the higher cumulative germination, lower cost, and environmental concerns, hot water treatment at 80 or 100 degrees C for 11-15 min is recommended.
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