Abstract: Background and Objective: Pod rot disease caused by Phytophthora palmivora is one of the causes of low productivity in cocoa plants. The objective of the study was to determine the effectiveness of botanical pesticides composite inhibiting the growth of Phytophthora palmivora biomass and to know the type of botanical pesticides composite that able to inhibit the black pod rot disease in cocoa. Materials and Methods: The research was conducted in Plant Protection Laboratory, Faculty of Agriculture, Halu Oleo University. The research designed using a completely randomized design, consisting of six treatments as follows: C0 = Without pesticide, C1 = Composite of cashew nut shell extract+liquid smoke, C2 = Composite of cashew nut shell extract+tree bark of Albizia saponaria, C3 = Composite of cashew nut shell extract+leaf of siam weed (Chromolaena odorata L.), C4 = Composite of cashew nut shell extract+leaf of Cassia alata, C5 = Composite of cashew nut shell extract+tree bark of Albizia saponaria+leaf of siam weed (Chromolaena odorata L.)+Leaf of Cassia alata and C6 = Chemical pesticide as a control treatment with active ingredients copper oxysulfate (345 g L–1). The parameters observed were dry weight of Phytophthora palmivora biomass and extensive spotting of cacao pod rot. Botanical pesticides were applications in two phase’s inhibitory test. Firstly, is in petri dish using vegetable juice (V4) media. Secondly, is in the laboratory using healthy cocoa fruit. Result: The results showed the effectiveness of botanical pesticides from composite of cashew nut shell extract+leaf of siam weed (Chromolaena odorata L.) to inhibit the growth of Phytophthora palmivora biomass is 60.92%. Conclusion:The composite of botanical pesticides is able to inhibit the development of symptoms of black pod rot disease by 63.59%.