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Local variation between catches of pea moth cydia nigricana lepidoptera tortricidae in sex attractant traps with reference to the monitoring of field populations



Local variation between catches of pea moth cydia nigricana lepidoptera tortricidae in sex attractant traps with reference to the monitoring of field populations



Protection Ecology 6(1): 43-50



Data are presented to show that catches of male pea moth in sex-attractant traps, placed only a few hundred meters apart, can be different. This local variation emphasizes that monitoring traps should be used to assess the need to spray only in the fields in which they are placed. Estimates of the sampling variation associated with an individual monitoring trap catch indicate that specialist interpretation of monitoring trap catches by the Agricultural Development and Advisory Service [UK] must continue, especially for values just less than the threshold. The optimum density of monitoring traps remains undetermined; usually 1 pair of traps is placed in each pea field, but 2 pairs are recommended for large pea fields (> 50 ha). Further work is necessary before any major modifications to the monitoring procedure can be recommended.

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Accession: 005821945

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