미생물제제를 이용한 차나무 겹둥근무늬병의 방제

다국어 초록 (Multilingual Abstract)

Bacillus subtilis BD0310 isolated from tea leaves was used for the development of a biofungicide against
Pestitalotiopsis longiseta causing gray blight of tea plants. After mass culture of the antagonistic bacteria, the
biofungicide formulated as a suspension concentrate was evaluated for its control efficacy against the gray
blight of tea plant in a greenhouse and a tea plantation, respectively. Spray of the biofungicide 2 days before
inoculation of P. longiseta inhibited more effeciently the development of gray blight compared with spray of
the biofungicide 2 days after inoculation of the pathogen onto the leaves of tea plants in a greenhouse. In the
field investigation under application of the biofungicide in 2005 and 2006, control efficiencies increased
according to the number of spray of the biofungicide. Control efficiencies of the biofungicide were 52.4%,
66.7%, 71.4% and 85.7% against gray blight in 4 times spray of the biofungicide alone at 7 days interval, 6
times spray of the biofungicide alone at 7 days interval, 2 times alternate spray of biofungicide and chemical
fungicide at 7 days interval and 4 times spray of chemical fungicide alone at 7 days interval, respectively.
Therefore, the alternate application of the biofungicide and chemical fungicide at 7 days interval can increase
the control efficiency with reduction of the amount of chemical fungicides and the number of spray for the
control of gray blight of tea plants in the field.

참고문헌 (Reference)

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