The soap kills by direct contact so complete coverage is necessary. Repeat applications may be needed as eggs hatch. Pear midge, a tiny fly, causes deformed fruit infested with maggots and often, serious premature drop of the young fruit. Spray all the bark thoroughly . NOTE 4 .
Fire blight is a serious bacterial disease of pears.
The most characteristic symptom is the appearance of black-brown foliage and fruit attached to dead twigs. The disease is spread during bloom. If a problem, prune out infected branches, cutting at least 12 inches below any sign of the disease. Remember to apply a light application of machine oil to the tools to prevent rusting if you use the bleach solution. Scab, leaf and fruit spots.