ISHS Acta Horticulturae 422: International Conference on Integrated Fruit Production
TIMING OBSERVATION AND CONTROL OF MUSSEL SCALE LEPIDOSAPHES ULMI. |
| Authors: | H. H.M. Helsen, Leo H.M. Blommers, Marc C. Trapman |
| Abstract:
The mussel scale Lepidosaphes ulmi (L.) is locally an important pest in apple and pear orchards. Even light infestations can cause severe economic loss due to a zero tolerance on fruits for export. The optimal moment for chemical control is when all crawlers have emerged from under the scales. A temperature sum model was developed to indicate the best moment for observation and subsequent control. | |
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