Thoroughly wet all bark areas from ground level to scaffold limbs. Lorsban 50 WP is labeled for borer control on sour cherry, but not on sweet cherry, peach, or nectarine. For Thiodan, do not make more than 2 applications during fruiting period, nor within 21 days of harvest of peach, nectarine, or cherry. It is usually a problem only when apples are held in long-term storage. The disorder usually does not extend below the skin, but the skin discoloration makes fruit unmarketable.
Cultivars differ in susceptibility to scald.
Susceptible cultivars include McIntosh, Cortland, Red Delicious, Stayman, Turley, and Rome Beauty. Other cultivars can occasionally develop scald. It can be applied only as a post-harvest drench. See product label for rates. Drench fruit thoroughly by dipping the entire container or by overhead drenching of the containers long enough to cover fruit thoroughly, but not to exceed 30 seconds.