Abstract
AbstractWe investigated the canopy recovery of 3 tree species (pedunculate oak, Turkey oak, European beech) at two locations in the Veszprém county (Western Hungary) after severe defoliation by gypsy moth caterpillars in the spring of 2005. The Turkey oak has evidently the best recovery potential, and it almost completely replaced the lost foliage in 4 months. The pedunculate oak and beech needed 2 years to reach the same level of recovery. The pedunculate oak suffered from a heavy infection ofMicrosphaera alphitoidesafter defoliation and it probably slowed down its recovery. Neither the presence ofAgrilus biguttatusin the oak plot nor the appearance ofAgrilus viridisin the beech plot was observed during the study period. Population density of the buprestidCoraebus floerentinusshowed a considerable increase in the oak plot, but remained under the damage level. Neither other harmful appearance of other pests nor significant tree mortality were observed within 4 years from the defoliation. These results provide information for the evaluation of longer term influences of the gypsy moth defoliation and may support the decisions concerning pest control.
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