engleski

Distribution and flight dynamics fo Rhagloletis completa (Diptera: Tepritidae) and walnut quality evaluation in Croatia

Walnut husk fly, Rhagoletis completa is an invasive species spreading quickly and damaging walnuts in Croatia and neighbouring countries. We researched distribution, flight dynamics of this pest in Croatia and its influence on quality of walnut kernels. For monitoring the spread and flight dynamics of R. completa CSALOMON® PALz traps were used. Weight and the nutritional value of kernels (proteins) and the presence of mycotoxin contamination were measured. Walnut husk fly was found in six out of total of seven counties in Croatia and some of them are first records for the locations. The presence of the fly was not confirmed in eastern Croatia. The flight dynamics showed rapid increase in number of adults only a year after the introduction into new area. The weight of infested kernels was 5.81% lower compared to not infested. Protein content was 14.04% in infested kernels and 17.31% in not infested kernels. There was no difference in levels of mycotoxins. Additional research on mycotoxin levels in stored nuts, ovipositional preferences of walnut husk fly and protection measures against this pest are suggested.

invasive species; mycotoxin contamination; nutritional value; walnut husk fly

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