Insecta, Homoptera, Diaspididae .
Description, Biology, Life Cycle, Damage, Common Names, Images
- Host plants: common on pear, the Italian pear scale also develops on peach, plum, apple, walnut as well as various other fruit or forest trees.
- The fertilized female overwinters. Activity resumes in spring and egg-laying starts in May, continuing until the autumn. Average number of eggs produced: 40.
- Young nymphs are mobile for a few hours and then settle down mainly on the twigs by inserting their stylets into the plant and begin constructing their scale (*) . They continue to develop and become adult in the autumn. Males appear in August.
- There is 1 generation per year. However, colonies of a different age may be found on the same tree due to the protracted egg-laying period. Nymphs produced late die if climatic conditions are not favourable.
- Feeding punctures of adults and nymphs cause a delay in plant growth, the formation of splits and distortions (*) . Heavy infestations lead to the appearance of encrustations which cause the branches and twigs to dry out (*) . Fruit production is also reduced. Apple is affected onlu slighly but plum and especially peach react by producing gummy secretions.
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