Abstract
The effects of three fungicide mixtures (Previcur + Rizolex, Previcur + Benlate, Previcur + Derosal), and two seedling media (soil-based compost and peat compost) on the development of cos lettuce seedlings and plants at harvest were studied. The length, weight and stem diameter of seedlings, the fresh weight and the number of leaves of the plants at harvest were more favorable with Rizolex and peat. Benlate (active ingredient: benomyl) retarded the growth and development of seedlings, e.g., the length and stem diameter, 1.12 cm and 2.86 mm respectively, attained when using benomyl were the smallest in comparison with the 1.51 cm and 4.31 mm attained using Rizolex. In comparison to Benlate, Rizolex in combination with peat produced the best fresh weight and number of leaves at harvest with 614.09 g and 38.37 respectively. Due to the convenience of use and the results presented here, Rizolex together with peat are recommended to grow cos lettuce.
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