Cabbage is one vegetable that is important for human health, because it contains many minerals and vitamins. This time people's demands for product quality vegetable crops, economical and safe in the higher consumption. This study aims to determine the average population of the parasitoid Diadegma semiclausum. This research was conducted in the village of Rurukan, Tomohon, for 3 months (September-November 2015). Using a Completely Randomized Design (CRD), with three treatments and five replications. The research results are metarhizium sp fungus. can cause the average population of the parasitoid D. semiclausum 0.11 tail, while the average population D. semiclausum the 0.024 chemical insecticide applications on the control head and tail 0.07
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