Investigation of Cydia splendana Hübner and Cydia amplana Hübner as pests of pedunculate oak acorn  [2012]

Drekić, Milan (Institute of Lowland Forestry and Environment, Novi Sad (Serbia)) Vasić, Verica ( Institute of Lowland Forestry and Environment, Novi Sad (Serbia))

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In order to ensure sustainable management of penduculate oak forests it is necessary to provide enough supplies of high quality acorn for natural or artificial regeneration. In this purpose, at Forest estate Sremska Mitorvica were established two seed orchards of penduculate oak. In first years at seed orchard Banov Brod was observed that greatest share of acorns is destroyed before ripening of acorns, where dominant cause is addressed to acorn feeding insects. Investigations showed significant share of damages caused by Cydia splendana and Cydia amplana what initiated study of their biology and damage intensity. Research was conducted at seed orchard Banov Brod and laboratory of the Institute of Lowland Forestry and Environment. Results showed that C. splendana swarming spreads from beginning of July until end of August, with highest intensity in first half of August. Swarming of C. amplana was recorded from start of July until end of August. First caterpillars bored into acorns was observed in July with maximum number recorded in August for C. splendana and in September for C. amplana. Start of emerging of caterpillars from acorns was recorded in September and for C. splendana it ended in mid October, while for C. amplana it lasted until the end of October. Both species hibernate in the form of cocoon. Damages made by C. splendana and C. amplana were relatively high and in 2003 affected was 29,4% of yield, and 26,6% in 2004. Most of the damage was done by C. splendana .

Other subjects

  • Quercus robur
  • acorns
  • Cydia

From the journal

International Scientific Conference Forests in Future - Sustainable Use, Risks and Challenges