This research aims to determine the achievement in Nano-zinc oxide materials. To prevent fungal leaf disease of Marigold and the frequency in Nano-zinc oxide spray material that is suitable as a type of marigold flowers that can grow revenues, and as the flowers are important economic, Marigold is rather high price. Planting Marigold today often the disease that causes the output is quite low. Fungal leaf spot disease found in most Farmers need to use chemicals, resulting in a loss of both the cost and the environment. Nano zinc oxide materials currently used in agriculture is that interesting. One way to help farmers who cultivate Marigold has produced. In this research, Nano-zinc oxide materials come to spray them with Marigold. Nano zinc oxide materials with properties to resist bacteria and fungi and therefore should be used with Marigold. In this research, plant Marigold by converting each, divided into 4 clear conversion cost and Marigold 10 spraying the Nano zinc oxide materials as follows: 1. the conversion of a non-material, Nano-zinc oxide 2. nano-materials that are sprayed zinc oxide every day. 3. nano-materials that are sprayed zinc oxide every 3 times and 4. nano-materials that are sprayed zinc oxide every 5 days. The results of experiments have found that the use of nano-zinc oxide materials can prevent fungal leaf spot disease of Marigold, which results in the conversion of nano-materials from which to spray 2 zinc oxide every day can help prevent fungal diseases and a spot of Marigold is better than the other, and find that there is a conversion of the growth and have the best output.
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