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Dear Editor,Copper,one of the micronutrients,is essential during vegetative growth,development,and multiplication of plants (Pe(n)arrubia et al.,2010).Copper is widely known for its application in fungicides and bactericides in agriculture since the late 19th century,for example,in the well-known Bordeaux mixture.Previous studies show that the mechanisms of copper ionsmediated antimicrobial activity involve either inhibition of the enzymes participated in fungal spore germination or direct toxicity on the growth of bacteria.