Sun scald

Symptoms
The cause of this can be too strong sunlight on wet leaves or fruit. Another reason for scorch is a poor root system, so the plant can't draw enough water on hot days.

Treatment
Spray plants with water to keep them cool and less stressed. Glass in a greenhouse, on a window sill or in direct sunlight will be stronger, bear this in mind. Over watering can damage root systems, so watering correctly is critical, a little and often is the best advice to keep the peat constantly moist. Roots need air as well as water and if the conditions are too wet for too long, this will suffocate the roots and kill them, too dry and the plant will overheat on hot days.