ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
SITUATION AND IMPORTANCE OF SAN JOSE'-SCALE PARASITATION IN AUSTRIA |
| Author: | F. POLESNY |
| Abstract:
Up to 1978 a programme for biological control of Quadraspidiotus perniciosus with mass reared Prospaltella perniciosi was carried out. In the present situation all investigated Qu. perniciosus populations showed acceptable parasitation rates (from 11% up to 63%, mean 30%). On many sites the endemic endoparasitic wasp Aphytis sp. has a higher importance than Prospaltella. | |
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