engleski

Influence of different netting structures on codling moth and apple fruit damages in northwest Croatia

During the vegetation season of 2015 three different types of exclusion nets were set up in IPM apple orchard in Krapina (Croatia) to test their effectiveness in preventing the attack of codling moth to apple fruits. Nets the same in mesh size (2.4x4.8 mm) but different in color (white, red, yellow) were set up on three neighboring apple trees in a single row. To assess the presence of pest, weekly sampling of codling moth on pheromone traps in protected and unprotected (control) net rows was conducted. Single row netting structures resulted in a highly significant reduction of codling moth catches on pheromone traps in comparison to the unprotected rows in the experimental orchard. The percentage of codling moth infested fruits during the harvest time was statistically significant, in the protected net rows in comparison with unprotected rows. The lowest percentage of damaged the fruit was recorded under the red net (0.96%), followed by white net (1.04%) and yellow net (2.86%). Percentage of damaged fruits in unprotected row amounted 11.39%. Considering the fact that all netting structures were not full exclusion nettings (e.g. in some cases it was impossible to hermetically seal the nets) their use has successfully protected the fruits of apples from codling moth attack.

Cydia pomonella; crop protection; anti-hail nets; physical control

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