The Effect of Soil Type and Moisture on Germination and Growth from Wheat Seed Treated with Phorate1
| Autor: | M. C. Wilson, R. E. Kirk |
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| Rok vydání: | 1960 |
| Předmět: | |
| Zdroj: | Journal of Economic Entomology. 53:771-774 |
| ISSN: | 1938-291X 0022-0493 |
| DOI: | 10.1093/jee/53.5.771 |
| Popis: | Studies were conducted in the greenhouse to determine the effect of soil type and moisture on the viability of phoratetrcated wheat seed, The effects of different soil types and different moisture levels on germination and early growth of wheat were found to be highly significant. Seed viability was adversely affected by excess moisture, regardless of treatment. Although germination under minimum moisture conditions was only slightly impaired, plant growth was severely reduced. It was found that soils and moisture levels may interact in their effect on seed viability. Several interactions were highly significant. The clay silt-loam and the muck soil gave opposite results under conditions of minimum moisture. With minimum watering, relatively high germination and yield were obtained in muck in contrast with low germination and low yield in clay silt-loam. With excess moisture, germination was low in both soils. Untreated seed exhibited low viability in muck soil, probably owing to soil microӧrganisms, as germination was substantially improved by the addition of a fungicide. Germination of seed treated with the highest rate of phorate, 0.5 pounds per 100 pounds of seed, was relatively high in the very fertile soils (muck and Agronomy Farm silt-loam). This suggests an apparent tying up of the insecticide by the organic matter in the soil. In general, phorate-treated seed was less viable in soils having a low water-holding capacity. Viability of phoratetreated seed was also less with moisture factors which tended to delay germination, whether due to low or excessive amounts of water. |
| Databáze: | OpenAIRE |
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