No synthetic active substance is authorised against it on fig or persimmon in Greece - only paraffin oils, maltodextrin and potassium salts of fatty acids, all of which act physically. That makes the crawler stage the whole of the treatment window, and coverage more important than dose.
Rojo Brillante is harvested firm and intensely astringent. Astringency goes only when enough acetaldehyde accumulates to make the tannins insoluble. The mechanism, the CO2 and ethanol protocols as applied in Spain, and what goes wrong when the chamber leaks, the batch is uneven or the treatment runs too long.
Salinity, nitrogen and soil calcium — the three points where persimmon growing does not forgive. With documented limits, planting distances, nutrition, diseases and postharvest. Doses in kg/ha.
Two overlapping generations a year, 538 degree-days from egg to adult, and a chemical toolbox that keeps shrinking. Greek monitoring data from Imathia and Pieria, the native egg parasitoids already at work, and where the samurai wasp stands today.
The Spanish cultivar that redrew the world map of persimmon — and the one that cannot be sold crisp without a CO₂ deastringency chamber. Astringency group, harvest, the 8 °C limit, and circular leaf spot.
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