Pacific Pests, Pathogens & Weeds - Mini Fact Sheet EditionBean (cowpea) fly (291)
Pacific Pests, Pathogens & Weeds - Mini Fact Sheet EditionBean (cowpea) fly (291)
Summary
- Worldwide. Sub-tropics and tropics. On beans of many kinds - Vigna, Phaseolus, and weeds.
- Eggs in seedling leaves hatch, and larvae tunnel to the midrib, then to the petiole and lower stem.
- Plants wilt, are stunted, or may fail to yield.
- Natural enemies: parasitoid wasps.
- Cultural control: remove volunteers and weeds; avoid overlapping crops; hill-up 2-3 weeks after germination (damage stimulates roots) ; mulch to encourage root formation; tolerant varieties.
- Chemical control: commercial growers – treat seed (e.g., imidaclorprid); or spray plants (dimethoate).
Common Name
Bean fly
Scientific Name
Ophiomyia phaseoli; previously Melanagromyza phaseoli.
AUTHOR Grahame Jackson
Information from CABI (2015) Ophiomyia phaseoli (bean fly). Crop Protection Compendium (www.cabi.org/cpc); and from Bean fly. Department of Agriculture and Fisheries. Queensland Government. (https://www.daf.qld.gov.au/plants/field-crops-and-pastures/broadacre-field-crops/integrated-pest-management/a-z-insect-pest-list/bean-fly). Photos 1&2 Shepard M et al. Insects and their natural enemies associated with vegetables and soybean in Southeast Asia, Bugwood.org. Photo 3 Shane McEvey, Australian Museum (Phyiomyia sp., Townsville, Queensland).
Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.
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