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European Corn Borer attack intensity and damages caused by Western Corn Rootworm through 5 years investigations

Corn is one of the major crop sown in Croatia. In the past, the main pest of corn in this area was European Corn Borer (ECB), but since 1995, Western Corn Rootworm (WCR) occurred, and become new threaten in corn production. The aim of this investigation was to determine attack intensity of European Corn Borer and damages on roots caused by Western Corn Rootworm. Field trials were settled in Osijek area in 2001 – 2005. Seven commercial corn hybrids were evaluated in four replicates (25 plants in each replicates) in order to determine damages caused by both pests. Root damages to larval feeding of WCR were evaluated early in July according to Iowa Node Injury Scale (0-3). Intensity of attack (%) of ECB was evaluated in September, before harvest. Results of Investigations for both pests are presented in fig. 1. Figure 1. European Corn Borer attack intensity and damages caused by Western Corn Rootworm through 5 years investigations Statistical analyses showed significant differences between years of investigations, but not between hybrids, for both pests.

European corn borer ; western corn rootworm ; attack

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