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A Boarmia pest on cocoa and Moghania macrophylla in the Deli-Serdang district



A Boarmia pest on cocoa and Moghania macrophylla in the Deli-Serdang district



Bulletin Balai Penelitian Perkebunan Medan 12(2): 49-54



Due perhaps to a long dry spell, delayed pruning of Moghania macrophylla hedges and the use of an unsuitable insecticide, an outbreak of loopers (Boarmia sp.) took place at a cocoa estate in the Deli-Serdang district of North Sumatra. Normally this insect is kept in balance by its parasites and predators. The pest was brought under control by ceasing the use of the universal insecticide, replacing it with a selective one and later with Bacillus thuringiensis.

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