|Studies in the distribution of insects by aerial currents: III. Insect drift over the sea|In: Ecological Entomology. Royal Entomological Society/Wiley: Oxford. ISSN 0307-6946, more
Insect drift; Agricultural pests;
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1. Aerial samples caught in nets slung from ships mastheads contained predominantly small, weak-flying insects.2. From over 102 trips with a total sailing time of over 1151 h, some 1825 insect specimens were collected.3. In a specified area over the North Sea more than 160 km from land (seventy-five samples), catches averaged 1 insect h-1; in the English Channel, in a smaller area more than 80 km from the coasts, hourly catches averaged 4 insects h-1.4. Lists of orders, families, genera and species caught are appended.5. Aphids, which constituted more than 60% of the total, apparently originated mostly from the west or north-west, i.e. from Europe, whereas most other insects seem to have originated from the north-east and south, i.e. from Britain.6. These data have implications for the spread of agricultural pests to and from Britain.