Euschistus crenator
(Fabricius, 1794)
Euschistus crenator is a phytophagous (Hemiptera: Pentatomidae) recognized as a key pest in soybean , causing direct damage to developing grains. The occurs across the Caribbean, Central America, North America, and South America, with confirmed in northern Brazil (Roraima and Pará states). Second-instar nymphs exhibit high susceptibility to fungi, and the Telenomus podisi has been confirmed to parasitize its eggs. The species is frequently misidentified with due to morphological similarities.
Pronunciation
How to pronounce Euschistus crenator: /juːˈskɪstəs ˈkriːnətər/
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Identification
Often misidentified with due to morphological similarities; reliable distinction requires careful examination of diagnostic characters. Specific identification features for E. crenator are not documented in available sources.
Images
Habitat
Soybean crops (Glycine max); laboratory rearing occurs at 27±1°C day/26±1°C night, 65±10% relative humidity, and 12h:12h light:dark .
Distribution
Caribbean Sea, Central America, North America, and South America; confirmed present in northern Brazil (Roraima and Pará states).
Diet
Phytophagous; feeds on green beans (Phaseolus vulgaris) and raw shelled peanuts (Arachis hypogaea) under laboratory conditions. Field diet on soybean consists of developing flowers, pods, and seeds.
Host Associations
- Telenomus podisi - Confirmed of E. crenator documented for the first time in 2026 study
Life Cycle
stage followed by five nymphal instars before reaching adulthood; second-instar nymphs have been observed in laboratory studies.
Behavior
Highly susceptible to by fungi; frequently misidentified in field surveys with , complicating -specific management.
Ecological Role
Key pest in soybean causing direct damage to grains and compromising crop productivity; serves as for agents including fungi and .
Human Relevance
Agricultural pest of economic significance in soybean production; target for strategies combining fungi and conservation of natural enemies.
Similar Taxa
- Euschistus herosMorphological similarity leads to frequent misidentification in field surveys and crop monitoring
More Details
Subspecies
Two recognized: Euschistus crenator crenator (Fabricius, 1794) and Euschistus crenator orbiculator Rolston, 1974
Biological Control Potential
bassiana isolates LCMAP106, UFSM-01, and commercial strain PL63 achieved 83.75%, 75%, and 87.5% mortality respectively against second-instar nymphs after 10 days, demonstrating potential for microbial control
Sources and further reading
- BugGuide
- Wikipedia
- GBIF taxonomy match
- iNaturalist taxon
- NCBI Taxonomy
- The Incredible Life of Chemical Ecologist Jeffrey Richard Aldrich | Bug Squad
- Soybean Insects: Late-Season Pests (R1 to R7) - AgriLife Extension Entomology
- Stink Bugs: New IPM Guide for Midwestern Corn, Soybean Growers
- Texas Entomologists Find Redbanded Stink Bug to Be Dominant Species on Soybean
- Pentatomidae | Beetles In The Bush | Page 2
- T.G.I.Flyday: Soybean nodule fly | Beetles In The Bush
- Potential of Beauveria bassiana in the control of Euschistus crenator (Hemiptera: Pentatomidae) and selectivity to the parasitoid Telenomus podisi (Hymenoptera: Scelionidae)