Lodging-resistant seed coating agent used for corn and containing trinexapac-ethyl, thiamethoxam, fipronil and tebuconazole and preparation method thereof

The invention relates to the field of pesticide preparations and discloses a lodging-resistant seed coating agent used for corn and a preparation method thereof. A composition used in the invention is composed of trinexapac-ethyl, thiamethoxam, fipronil and tebuconazole in a weight ratio of 1-2: 15-25: 2-4: 2-3. The seed coating agent comprises 1 to 2 parts of trinexapac-ethyl, 15 to 25 parts of thiamethoxam, 2 to 4 parts of fipronil, 2 to 3 parts of tebuconazole, 2 to 4 parts of FD, 0.5 to 1.5 parts of BC, 1 to 3 parts of 1602, 0.5 to 1.5 parts of an antifoaming agent, 7 to 12 parts of PEG 8000, 2 to 4 parts of urea, 0.05 to 0.15 part of xanthan gum, 0.2 to 1 part of aluminum-magnesium silicate, 0.2 to 1 part of a coloring agent and 1.5 to 2.5 parts of white carbon black, with the balance being distilled water. According to the seed coating agent, since trinexapac-ethyl, thiamethoxam, fipronil and tebuconazole are compounded as effective components and respective advantages of trinexapac-ethyl, thiamethoxam, fipronil and tebuconazole are mutually complementary, lodging resistance is obtained and insects and diseases can be prevented and treated, so the purpose of yield increase is achieved; moreover, the application amount, variety and frequency of pesticide are reduced; and the seed coating agent is widely applicable to the agriculture field.