The invention relates to the field of pesticides, in particular to application of a diterpene alkaloid compound serving as a secondary metabolite of a seaweed endophytic fungus. The diterpene alkaloid compound serving as the secondary metabolite of the seaweed endophytic fungus has insecticidal effect and is shown as a formula (I). The natural diterpene alkaloid compound is obtained by extractingand separating yeast of Aspergillus oryzae cf-2 fungus separated from ocean red alga heterosiphonia; and by insecticidal activity experiments, the fatality rate of artemia is 74.2 percent when the diterpene alkaloid compound is 100 micrograms per milliliter.
; 乔明锋
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