Sweet pepper is unforgiving of heat at flowering. Fruit set drops before any visible stress appears on the plant, and by the time it shows, the window has passed.
Variety-level decisions
Plant habit and canopy density affect how well developing fruit is shaded. A variety with adequate leaf cover protects fruit from sunscald in a way that no post-planting intervention can match.
What resistance codes cover here
Tobamovirus and PVY resistance are common on pepper sheets, and Leveillula taurica appears as an intermediate resistance. None of them address heat, which is a scheduling and shading problem rather than a genetic one.
