Amaranth — Pests and diseases

Metadata research draftEvidence limits

⚠️ Status: drafted from the literature survey. Values Unknown until source notes/full text.

Insects

• Leafy amaranth insect pests are documented (Kenya farmer study, candidate 10.1093/jipm/pmz029); plant bugs (e.g., Cletus/coreid bugs) noted in some studies. Grain-amaranth-specific pest pressure at small scale — Unknown.
• Mexico note: an entomofaunistic study on amaranth (A. hypochondriacus) in Puebla exists (title-only in sweep) — candidate.

Diseases

• White-rust / fungal leaf diseases reported on amaranth (incl. a field study in Bangladesh). Disease tolerance screening of A. hypochondriacus cultivars exists (candidate 10.1007/s13237-020-00335-y). Grain-amaranth disease profile Unknown.
• Downy mildew / damping-off risk at establishment — Unknown.

Birds and rodents

• Grain amaranth ripens in a dense panicle; bird pressure at maturity is a plausible small-scale concern (as for sunflower) — Unknown/flagged; no strong academic coverage in sweep.

Weeds

• Weeding-frequency trials on grain amaranth show yield responses (candidate 10.1016/s0261-2194(97)00017-3). Slow early growth of tiny-seeded crop → weed competition matters. Hand-weeding viability at small scale Unknown.

Small-scale relevance

• What dominates at 20 m² (birds, weeds, damping-off) vs large fields — Unknown; flagged for grower + experiments.

Structured-data impact

• Pests/diseases documented narratively; not yet in the structured schema.