Sampling for Bean Leaf Beetle Eggs: Extraction From the Soil and Location in Relation to Soybean Plants

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Abstract
The Illinois Egg Separator and associated techniques provide a rapid (9.5–16 minutes per sample) and consistently accurate (93.5% mean recovery rate) method for extracting Cerotoma trifurcata (Forster) eggs from the soil. Practically all the eggs found in a soybean field were in cylindrical samples 4 inches (10.2 cm) in diameter and 3 inches (7.6 cm) deep centered on plants in the row. Twenty-two of 30 such samples contained eggs, but only one of 120 samples taken between the rows contained any eggs. No eggs were found in samples taken from below a 3-inch depth.

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