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The efficiency of sampling for aphid predators from lucerne


, : The efficiency of sampling for aphid predators from lucerne. Proceedings of the Forty Second New Zealand Weed and Pest Control Conference, Taranki Country Lodge, New Plymouth, 8-10 August, 1989: 81-85

Sweep nets and D-vac were compared for their ability to sample aphids and aphid predators from lucerne in New Zealand. The apparent relative abundance of the predators differed significantly with the sampling technique. The sweep net showed a bias for catching aphids and adult Coccinella spp. Both methods failed to detect populations of some species. The sweep net failed to catch Phalangium opilio, Lycosa spp. or larvae of Coccinella spp. that were present.

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