Diseases

a) Fire blight (Erwinia amylovora):

• It spreads from tree to tree primarily during the bloom period.
• Where infection is already present, or occurs later, the infected areas should be pruned out.
• To control this disease, foliar spray of streptomycin in 50 ppm at 5-12 times throughout the spring and early summer is recommended.

b) Pear decline:

• Caused by mycoplasma transmitted by pear psylla.
• Can be controlled by controlling the population of pear psylla.