Pear leaf blister mite

Fruit tree leaf roller Pear leaf blister mite Codling moth... 

Pear leaf blister mite (Phytoptus pyrij... 

Fig. 5.65. Life cycle of pear leaf blister mite (Phytoptuspyri).

NATURE OF DAMAGE. The petals first turn red as a result of being sucked by the pear leaf blister mite. The yellowish-red blisters can be clearly seen when the first rosette leaves appear. The fruit is also damaged if infestation is severe, with extensive corky areas and sometimes malformations of the fruit. 

ENEMIES. No effective enemies of the pear leaf blister mite are known. 

DAMAGE THRESHOED. No damage threshold is known. The level of infestation in the previous year is the only criterion that can be used. The pear leaf blister mite can show explosive development from one year to the... 

CONTROL. If infestation by pear leaf blister mite was detected in the previous year, two sulphur sprays should be applied when the buds swell ... 

Cause Pear leaf blister mites. These microscopic mites live and feed on tissue inside leaves. They overwinter on buds and infest new leaves in spring. Spray plants in late winter with dormant oil or lime-sulfur. 

Damage Mites burrow from undersides into leaf tissue of pears, currants, and many ornamentals. Leaves react by forming raised blisters, puckers, or galls along leaf margins. 

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