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Monitoring protocol for WCR (Western Corn Rootworm) populations and its application to long term measurements of population dynamics

Monitoring protocol implemented in focus and safe area of Veneto region, described above, proved to be effective. In sensitive or newly infested area the following instructions can be summarized:

- Sex pheromone traps have to be used; PAL or other traps, which proved to be as effective as, PAL traps in detecting very low populations.

- Instructions accompanying PAL traps can be considered reliable; the position at maize ear level can be considered suitable; lure duration is over 45 days.

- Sex pheromone traps have to place out exclusively in monoculture maize fields; when the latter are few the traps have to be placed out in 1st year maize fields in any case.

- Traps can be placed out both in the edge and in the inner part of monoculture maize fields.

- The lower the population the higher the number of traps to be used to detect population presence; with very low populations as those observed around Veneto focus area at least 8-10 sex pheromone traps should be placed out along the edge, 30-40m far from each other, per each monoculture maize fields about 1 ha large.

- In order to get data for long term monitoring each year sex pheromone traps should be placed in the same monoculture maize field plus one nearby first year maize field or in one monocolture field and one 1st year maize fields within 500m from the position of the maize field where the first detection was recorded.

A qualitative information about WCR (Western Corn Rootworm) presence can be obtained by inspecting cucurbit plants (mainly flowers).

Informations connexes

Reported by

Universita degli studi di Padova
Via Romea, 16
35020 Albignasego
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