Photo 1. Larva of Hypolixus species, inside hollowed out centre of Amaranthus stem. Note the amount of frass present.
Amaranthus stem weevil. Amaranthus weevil, pigweed weevil.
Hypolixus species. The species recorded by CABI1 are Hypolixus ritsemae, Hypolixus truncatus, and Hypolixus nublilosus. Hypolixus haerens is reported as the most common pigweed weevil in Kenya.
AUTHOR Grahame Jackson
1CABI Amaranthus spinosus (spiny amaranth) (2017) Crop Protection Compendium. (www.cabi.org/cpc). Information from Tara JS (2009) Bionomics of Hypolixus truncatulus (f.) (Coleoptera: Curculionidae: Lixinae: Lixini), a major pest of Amaranthus caudatus L. Mun. Ent. Zool. Vol. 4(2); and Chittora A (2015) Insect pests of amaranthus and moringa. (https://www.slideshare.net/AkshayChittora/insect-pests-of-amaranthus-and-moringa-53613459); and Rajeshkanna et al. (2017) Biology and management of Amaranthus stem borer (Hypolixus trancatulus) Coleoptera: Curculionidae). Annals of Sri Lanka Department of Agriculture 19: 258-266; and from Blodgett J., Swart WJ, Louw SvdM (2004) Identification of fungi and fungal pathogens associated with Hypolixus haerens and decayed and cankered stems of Amaranthus hybridus. Plant Disease 88:333-337. Photos 1-5 Mani Mua, SPC, Sigatoka Research Station, Fiji.
Produced with support from the Australian Centre for International Agricultural Research under project HORT/2016/185: Responding to emerging pest and disease threats to horticulture in the Pacific islands, implemented by the University of Queensland and the Secretariat of the Pacific Community.
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