Special weeding and insect killing composition for peanut field and preparation method thereof

The invention discloses a special weeding and insect killing composition for a peanut field and a preparation method thereof. The composition is prepared from the following raw materials in percentage by weight: 10-30% of pendimethalin, 5-20% of imidacloprid, 2-15% of wetting dispersant, 0.5-8% of anti-freezing agent, 0.1-4% of anti-foaming agent, 0.1-4% of preservative, 0..05-3% of thickener and 16-82.25% of water. The composition disclosed by the invention makes full use of the characteristics of efficient weeding of pendimethalin and broad-spectrum insect killing of imidacloprid, has the advantages of high weeding activity and broad-spectrum insect killing, shows an excellent function of continuous insect killing and weeding, improves both quality and output of the peanut, and saves manpower and material resources, thereby being an ideal composition.