The invention relates to a bactericide composition containing pyraclostrobin and
copper rosinate, containing pyraclostrobin and
copper rosinate as effective components, wherein, the weight ratio of pyraclostrobin to
copper rosinate is 1:2-3. The bactericide composition provided by the invention is characterized by that: 1, the composition has good synergism on a plurality of
crop diseases within the range of certain proportion; 2,
drug resistance caused by using pyraclostrobin or copper rosinate alone can be delayed greatly because pyraclostrobin and copper rosinate have different mechanisms of action and no cross-resistance between each other; and 3, pyraclostrobin is a novel bactericide with high price, while copper rosinate is cheaper, so that the combination of pyraclostrobin and copper rosinate can reduce the cost. The bactericide composition is a novel bactericide with high efficiency,
low toxicity and broad-spectrum, with the advantages of long persistent period and being easy to use. Because the bactericide composition has a large number of reaction sites, the bactericide composition does not easily to generate
drug resistance. Furthermore, the bactericide composition has dual functions of preventing and treating, and is capable of treating common
plant diseases caused by a plurality of fungi and
bacteria, such as
downy mildew,
epidemic disease,
black spot disease, anthracnose, bacterial angular
leaf spot,
blight, tomato late
blight of melons and fruits and the like.