Abstract
Field experiments were carried out in the seasons 2000/2001 and 2001/2002 in Plant Protection Institute, Sooenicowice Branch to assess the influence of foliar fertilizers such as Ekolist PK 1, Ekolist Mg, Mikrosol Z and Urea on healthiness of winter wheat. Foliar fertilizers were mixed with fungicides. The fungicides were applied at full or half recommended doses. The effect of the disease on wheat leaves was evaluated three times in each vegetation season. Remaining green leaf area (GLA) of leaves was also determined. GLA of the leaves F-1 was not significantly different for each combination with different fertilization and different levels of chemical treatment. The application of foliar fertilizer only had no effect on green leaf area (GLA). The results indicate that foliar fertilization of all experimental plots improved leaf condition and therefore halted the development of wheat leaf diseases. The increases of 1000 grain mass and yield was high for each plot where a fertilizer and a full or half dose of a fungicide was applied. Foliar fertilizing with no chemical control had no proven effect on studied parameters.
Highlights
All fungicides were applied at full dose and a half dose with or without foliar fertilizing
Foliar fertilization without chemical control of diseases with fungicides had no effect on the reduction of wheat leaf infection by Phaeosphaeria nodorum, Pyrenophora tritici repentis and Puccinia recondita
Foliar fertilization with 50% fungicide doses proved effective in reducing winter wheat leaf infections foliar fertilization with full fungicide doses (Table 3)
Summary
Experiments were carried out at the Plant Protection Institute, Soœnicowice Branch. The design of the trials was randomized complete block with four replicates and plot size 20 m2. All fungicides were applied at full dose and a half dose with or without foliar fertilizing. The effect of the disease on wheat leaves was evaluated three times per each vegetation season. The severity of leaf infection by diseases was determined: powdery mildew (Blumeria graminis), septoria leaf spot (Phaeosphaeria nodorum), tan spot (Pyrenophora tritici repentis) and brown rust (Puccinia recondita). Per cent coverage of leaves by individual pathogens was estimated. At the growth stage GS-75 (medium milk) green leaf area was recorded. The 1000-grain weight was measured for each experimental combination.
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