The invention discloses a composite wheat seed
coating agent. The composite wheat seed
coating agent is prepared from the following raw materials in percentage by weight: 10 to 15 percent of
thiamethoxam, 0.5 to 1 percent of
methylene dithiocyanate, 0.05 to 0.1 percent of
growth regulator, 2 to 7 percent of dispersing agent, 1 to 4 percent of anti-
caking agent, 1 to 6 percent of suspending agent, 0.1 to 3 percent of film-forming agent, 1 to 10 percent of filler, 1 to 3 percent of
preservative, 0.5 to 5 percent of coloring agent and the balance of deionized water. The invention further provides a preparation method of the composite wheat seed
coating agent. The composite wheat seed coating agent and the preparation method thereof provided by the invention have the beneficial effects that the seed coating agent is mainly used for coating wheat seeds; the effective components of
thiamethoxam and
methylene dithiocyanate are efficient degradable
pesticide varieties; before wheat seeding, the seed coating agent coats wheat seeds in the
pesticide-seed ratio of 1 to 50, and seeds are sown after being dried in the air in a
natural state. The composite wheat seed coating agent has a remarkable
control effect on wheat aphids and
cyst nematode disease, can effectively lower the base numbers and
disease indexes of field aphids and
cyst nematodes, and has the advantages of safety, high efficiency,
low toxicity, saving of labor and economic efficiency; the
pesticide lasting period is prolonged, and the yield is increased by 10 percent or more.