Fomite, 0.5% clopyralid, watermelon use generally a package of 1 kilogram of water, at different temperatures in reference to different amounts of water. Temperature below 18 degrees, to water 0.5-1.0 kg, temperature 18-24 degrees, to water 1.0-1.5 kg, temperature 25-30 degrees, to water 1.1-2.0 kg. In the watermelon female flowers on the day of opening or 1 day before or after, with this product diluted solution spray melon tires 1 time.