Assessment of methods for estimating the numbers of aphids (Hemiptera: Aphididae) in Cereals

Author:

Dewar Alan M.,Dean Godfrey J.,Cannon Ray

Abstract

AbstractVisual counting was found to be the most accurate method of estimating cereal aphid numbers in field studies in England. Vacuum sampling decreased in efficiency as aphid density increased, but could be a useful alternative to visual counts at very low aphid densities when the latter became too time-consuming. Cutting tillers for later washing in the laboratory was less efficient than visual counting as aphids, especially Metopolophium dirhodum (Wlk.), fell off the plants during sampling, but this method was useful in determining the proportion of different morphs of Sitobion avenae (F.) present at very high densities.

Publisher

Cambridge University Press (CUP)

Subject

Insect Science,Agronomy and Crop Science,General Medicine

Reference12 articles.

1. Vickerman G. P. (1977). Monitoring and forecasting insect pests of cereals.—pp. 227–234 in Proceedings of the 1977 British Crop Protection Conference—Pests and Diseases (9th British Insecticide and Fungicide Conference), 21st to 24th November 1977, Hotel Metropole, Brighton, England. Volume 1.—322 pp. London, British Crop Protection Council.

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4. Improved preparation of (E)-?-farnesene and its activity with economically important aphids

5. Fitting a Straight Line When Both Variables are Subject to Error

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