engleski

Effect of sustainable agricultural practices on control of potato scab in Croatia

The potato production in Croatia usually is organized on private farms on small fields with different soils and production techniques. One of region with greatest potato production is Međimurje. Most of producers in this region plant potato more than twice time on same field or have very narrow crop rotation. Most of soils in region show acidic reaction and usually farmers apply different materials like limestone or hydrated lime to reduce soil acidity, but without any lab control or recommendation. Soils with this management practice show drastic “ common scab” infections if soil moisture during tuber bulking is low. So, we were conducted field trials on private farm in Belica. Trial was set up on acidic soil (pH 5.1) during 2003 to 2005 growth season and maize (Zea mays L.) was previous crop. The aim of research was to investigate the effect of immature chicken manure (20.0 t ha-1), hydrated lime (2.5 t ha-1) and foliar fertilizer application of Epso Salt (Ca, B, Mn) (25 kg ha-1) on intensity of common scab infection on different cultivars (cv. Courage and cv. Desire). Trial was set up as split plot design in for repetition. All plots in trials were fertilized by 148 kg N ha-1, 147 kg P2O5 ha-1 and 205 kg K2O ha-1 as recommended by lab. Each of trials had standard practices of weed, pest and disease control. Trial results show that Desire had significant higher percent of infected tubers with higher intensity of infection than Courage. In wet season 2004 there is no evident on scabies infection. Differences between treatments are not significant but lime addition increases scab. By foliar application Epsom salt intensity of scab can be slightly reduced.

Streptomices scabies; chicken manure; foliar fertilization; manganese; calcium; boron

nije evidentirano