Disrupting spring colonization of Colorado potato beetle to nonrotated potato fields

Abstract

Overwintering Colorado potato beeries (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.

Host plant species determines symbiotic bacterial community mediating suppression of plant defenses

“…CPB is a major pest of Solanaceous crops, such as potato ( Solanum tuberosum ), tomato ( S. lycopersicum ), and eggplant ( S. melongena )13. CPB originated in southern Mexico where the major host plants are buffalobur ( Solanum rostratum ) and S.angustifolium 14.…”

Physical Control in Greenhouses and Field Crops

“…Insects of this sort, such as the CPB are conducive to trapping in trenches. Weber et al (1994) found in Massachusetts that CPB could be found in over-wintering sites in densities as high as 188 adults/m 2 • Special in-ground plastic trenches have been designed for Canada and northeastern USA to trap these migrating adults (Boiteau et al 1994). The trench, a 25-cm-deep furrow lined with black plastic, can be dug around the potato field to be protected.…”

Within-Field Spatial Structure of Colorado Potato Beetle (Coleoptera: Chrysomelidae) Populations in New Brunswick

“…In Wisconsin, crop rotation within the pivot irrigation system provides a perfect situation for edge colonization (Hoy et al 1996). In Massachusetts (Weber et al 1994, Ferro 1995, attempts to control the beetle as they colonized the edge had only moderate results, suggesting that the beetles have a low residency time at the edge. In New Brunswick, border colonization occurs, but its frequency is unknown.…”