Identification
Commonly found on roses during hot summers. Caused mostly by watering where salt in the water is deposited on the leaves along the edges and the sun evaporates the water leaving the salt which then burns these areas.
Control
Solution is to avoid getting too much water on the leaves with watering. Using drip irrigation is both more efficient and also eliminates this problem.
Properties close to the sea can also see this problem occur. In these cases it is best to wash plants with a hose after it is suspected salty winds may have deposited salt on the plants.
Have seen this occur with foliage sprays where the same action takes place.

AERIAL ROOTING
ANIMAL DAMAGE
APHIDS
BLACKSPOT
BOTRYTIS
CATERPILLAR
CATERPILLAR
CHILLI THRIP
CROWN GALL
EARWIG
GALAH DAMAGE
GARDEN WEEVEL
IRON DEFICIENCY (High pH Level)
LADYBIRD
LADYBIRD NYMPH
LEAF CUTTER BEE
MILDEW
RAIN BRUISING
RUST
SCALE
SPIDER MITE (Two Spotted Mite)
SPRAY BURN
SPRAY DAMAGE
SUN BURN
THRIP
VEGETATIVE CENTRE
VIRUS MOSAIC
WASP COCOON
WILT & DIEBACK