2007•The Korean Journal of Pesticide ScienceRequires access
Characteristics and control activity of copper hydroxide against pepper Phytophthora blight caused by Phytophthora capsici
Sun-Bo Kim, Gi-Young Min, Joo-Heong Kim, Myeong-Wook Shin, Myeong-Ki Kim, Cho-Rhong Yeon, Heung‐Tae Kim
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Abstract
Characteristics and control activity of copper hydroxide against pepper phytophthora blight caused by Phytophthora capsici were investigated in a greenhouse and a pepper field Copper hydroxide strongly inhibited the germination of zoosporangia and zoospores of P. capsici JHCS 2-5, showing value by 0.6 and 0.3 . With 1,040 of copper hydroxide in a greenhouse it showed 80% of the control value by soil-drenching application, while 16% by leaf-spraying. However, when it was treated enough to runoff to soil by leaf-spraying application with 50 ml per a pepper plant, it controlled a pepper phytophthora blight by 94.6 % of control value. Copper hydroxide showed a high protective activity at 1 and 3 days before application, while no curative activity. In a field it showed a high activity of 91%, when pepper plants were treated with copper hydorxide 4 times with a intervals of 10 days.