Occurrence of Parthenolecanium corni (Bouche) on 18 cultivars of hazelnut
2004
Gantner, M., E-mail: [email protected] | Jaskiewicz, B. | Golan, K. (Lublin Agricultural University (Poland). Dept. of Entomology)
Observations dealing with the occurrence of Parthenolecanium corni on 18 cultivars of hazelnut were conducted in southeastern Poland in the years 2000-02. During the leafless period the pest overwintering forms occurring on hazelnut shoots were counted. The results confirmed the differences between the numbers of larvae of P. corni on chosen cultivars. Larvae of P. corni occurred in the greatest number on the cultivars: Negrett, Jeeve's Seedling, and Wonder from Bollviller. The cultivars: Nottingham, Catalonische Zellernuss and species: Corylus americana were inhabited in the smallest amount. The chemical treatment with Promanal 60 EC used at the beginning of April 2002 reduced the number of P. corni larvae on average about 80 percent
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