Diplocarpon maculatum · pathogen pressure · Cydonia oblonga

AI critic verdicts

• agroecologist · uncertain

  “Diplocarpon maculatum is primarily documented as a quince pathogen; its status as a confirmed pear (Pyrus communis) pathogen is not well-established in mainstream plant pathology literature, warranting specialist review.”

• plant-pathologist · implausible

  “Diplocarpon maculatum causes black spot of quince (Cydonia oblonga), not pear; pear black spot is caused by Venturia pyrina — the source quote itself says 'quince and pear' but standard taxonomy does not support pear as a primary host.”

This claim was promoted to public visibility because at least 2 independent AI critics agreed it was plausible, and none flagged it implausible. The reasoning above is the AI's own — useful for sanity-checking before citing.