Fire Blight (Apples & Pears)

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Fire Blight

(Apples & Pears)

Description: : Can cause severe damage to apple and pear

trees. Fire blight usually attacks blossoms, but infection

and dieback of new shoots is common (see photo). The

downward curled twig tip is characteristic of fire blight.

Solution: Cut off

infected twigs and branches 12″ below the dead area.

Disinfect pruning tool between cuts by dipping in 10%

solution of liquid bleach to avoid spreading disease.

Control blight by spraying Soap-Shield® Fungicidal Soap

at silver tip and bud break, and repeat at 3-5 day intervals

as needed, up to petal fall. Use at the rate of 1 oz.

per gallon if disease pressure is light, 2 ozs. per

gallon if disease conditions favor heavy disease pressure.

Note: Soap-Shield, as used in this recommendation, may

cause russetting of Golden Delicious and similar susceptible


Fire blight can also be controlled by applying Fire Blight Spray every 3-4 days

during bloom time, and then at 5-7 day intervals. (We

prefer Soap-Shield because, in addition to fire blight,

it controls a wide range of fruit tree diseases.) To

control sucking insects such as aphids, leafhoppers,

and plant bugs, which spread fire blight, use PyolaTM Insecticidal

Spray every 10 days from time leaf tips appear

until petal fall, then every 14 days.


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