Aphid Sampling Efficiency of Möericke Traps Affected by Height and Background12

Abstract
Alate aphids were trapped in studies of the field spread of lettuce mosaic virus. The effectiveness of yellow-painted water pans (MÖericke traps) at different heights and backgrounds was compared in determining the seasonal abundance of alate aphid populations. Pans 15 inches above bare soil were most effective; pans at the same height surrounded by plants were less effective; and pans 8 feet above bare soil were least effective. Sixty-eight species of aphids in 37 genera were identified. Myzus persicae (Sulzer), green peach aphid, comprised 28% of the total. Brevicoryne brassicae (L.), cabbage aphid; Rhopalosiphum maidis (Fitch), corn leaf aphid; and Hyalopterus atriplicis (L.) contributed 37% of the total.

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