Early infection of pear trellis rust on leaves.
Pear trellis rust progression.
Pear trellis rust at onset.
From years managing pear orchards, we've seen pear trellis rust start with orange pustules on leaf undersides, turning gray later. Not highly destructive, but heavy infections blacken leaves, cause early drop, and cut yields. Use standard rust fungicides. Avoid Bordeaux mixture—phytotoxic to pears. Horsetail decoction delivers reliable control.
Pear trellis rust symptoms.
