ABSTRACT Papaya (Carica papaya L.) is a tropical plant with fruit rich in nutrients such as provitamin A, vitamin B, provitamin C, minerals, and fiber. Papaya yields in Riau have been declining annually, caused by the decline in production due to the mealybug (Paracoccus marginatus) pest. The use of the predator C. transversalis can be an alternative for controlling P. marginatus safely. This …