ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
LIFE-HISTORY PARAMETERS OF T.URTICAE KOCH ON SELECTED CULTIVARS OF BLACK CURRANT. |
| Authors: | B. Czajkowska, D. Kropczynska |
| Abstract:
The life histories of T.urticae Koch were studied under laboratory conditions (temp.25°C, RH 65%) on five black currant cultivars. The intristic rate of increase rm ranged from 1.217 on cv. Bona to 1.818 on cv. Titania. The results indicated that the population of two-spotted spider mite increased more rapidly on cultivar Titania than on other cultivars studied. Under the field conditions the highest population of T.urticae are usually observed on Ben Lomond rather than on other tested cultivars. The relation between the rate of development of mite population and total leaf area accesible to mite on the studied cultivars are discussed. | |
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