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Coffee Bean Weevil Featured Fruit Infestation
February / March 2023

SPILLING THE BEANS The coffee bean weevil on citrus

SA Fruit Journal: February / March 2023

The coffee bean weevil was first reported to feed on citrus in 1885. By Tamryn Marsberg, Sean Moore, Wayne Mommsen and Tim Grout (CRI, Gqeberha)

Araecerus fasciculatus (Coleoptera: Anthribidae), commonly known as the coffee bean weevil (CBW), is a cosmopolitan pest of stored tropical and subtropical produce (Grout et al., 2001; Yang et al., 2017). CBW has a global distribution and has been known to infest over 100 different host plants (Alba-Alejandre et al., 2018). Common stored produce hosts include maize, coffee beans, cassava, sweet potatoes and dry ginger. CBW has also been recorded to infest citrus and sugar cane (Yang et al., 2017).

The adult CBW is approximately 4 – 5 mm long (Figures 1). The female weevil will insert a single egg 1 – 2 mm deep into a food source and in some cases has been known to oviposit six eggs at a time (Figure 3). The larva will emerge and complete its life cycle, which consists of five instars in the fruit, feeding on the albedo, pulp and seeds (Figures 1 and 2) (Alba-Alejandre et al., 2018). Depending on the temperature and type of produce, CBW can have between eight and 10 generations per year (Alba-Alejandre et al., 2018).

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