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Disrupting spring colonization of Colorado potato beetle to nonrotated potato fields
- Weber, D.C., Ferro, D.N., Buonaccorsi, J., Hazzard, R.V.
- Entomologia experimentalis et applicata 1994 v.73 no.1 pp. 39-50
- Leptinotarsa decemlineata, Solanum tuberosum, adults, colonizing ability, cultural control, insect control, larvae, mortality, overwintering, pitfall traps, potatoes, spring, trap crops
- Overwintering Colorado potato beetles (Leptinotarsa decemlineata (Say)) were concentrated primarily within woody borders, and mortality was lower in borders than in potato fields. After overwintering, only 15-44% of live beetles were in the potato fields. In experiments with small plots, colonization of fields from woody borders was reduced ∼ 60% by a trap crop, either treated with adulticide or with beetles collected daily. Such trap crops, or simply pitfall traps to prevent colonization from woody borders, could significantly reduce early-season adult numbers and subsequent larval populations. However, success is dependent on the local densities of overwintered beetles, and the prevalence of arrestment behavior in the case of trap crops.