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- Title
AN APHID COUNTING GRID.
- Authors
Strickland, A. H.
- Abstract
This article focuses on the assessment of cabbage aphid, Brevicoryne brassicae, populations in relation to yield reduction in commercial Brussels sprout crops at a number of centers in England and Wales in 1951. In the Cabbage aphid population work, individual samples have contained as many as 25,000-30,000 aphids. With large samples of this type the population estimate is arrived at by a combination of volumetric and grid methods. After washing from the sample of brassica leaves, the aphids are shaken up in fresh 95 to 98% alcohol and allowed to settle. After not more than five minutes settling the volume of aphids should be noted. A part of the aphid sample is then poured into a petri dish and prepared for counting, the volume of aphids remaining in the measuring cylinder being noted again after a further settling period. It is then a simple matter to estimate the number of aphids in the complete sample.
- Subjects
ENGLAND; WALES; INSECT population estimates; CABBAGE aphid; CABBAGE diseases &; pests; BRUSSELS sprouts
- Publication
Plant Pathology, 1954, Vol 3, Issue 3, p73
- ISSN
0032-0862
- Publication type
Article
- DOI
10.1111/j.1365-3059.1954.tb00698.x