Feeding preferences of leafroller caterpillars (Lepidoptera, Tortricidae) for some apple cultivars
2005
Pluciennik, Z., E-mail: [email protected] | Olszak, R.W. (Research Institute of Pomology and Floriculture, Skierniewice (Poland)), E-mail: [email protected]
Evaluation of fruits and leaves of 17 apple cultivars in respect of their attraction as food for caterpillars of leafroller species occurring in an experimental apple orchard was carried out over 1995 to 1998 in the Institute of Pomology and Floriculture at Skierniewice (Poland). The highest levels of injuries were observed on two cultivars: Ligol and Elstar. High number of injured fruits was noted on the following cultivars: Gala, Jonagold, Cortland, Idared, Lodel and Szampion. By far the number of injured fruits was lower on Lobo and Jonathan, and the least on Rubinette, Starkrimson and Gloster. Significant differences in the number of caterpillars settled down in leaf/flower clusters of particular cultivars during the vernal period were also confirmed. In each season the highest number of caterpillars of Pandemis heparana and Archips rosana were observed on leaves of Alwa. To cultivars whose leaves were also readily settled down by the two aforementioned species were: Jonathan, Cortland, Ligol, Lobo, Jonagold and Elstar. Relatively less caterpillars were observed on leaves of Arlet, Gloster, Szampion, Starkrimson, Pilot, Pinowa and Rubinette
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