# Protection of Oats against _Puccinia_ and _Drechslera_ Fungi in Various Meteorological Conditions
## 3 Results
In 2013, the oat grain yield from control plots of the tested varieties ranged from 6.54 (Bingo) to 7.53 t \(\times\) ha\({}^{-1}\) (Arab) (Table 6). The use of fungicides from the chemical groups of triazoles and strobilurins allowed yields of 6.31 (apoxiconazole, Bingo)--7.77 t \(\times\) ha\({}^{-1}\) (picoxystrobin, Arab) to be obtained. The grain yield of the Maczo variety was clearly lower, ranging from 4.15 to 4.80 t \(\times\) ha\({}^{-1}\). The grain yield of the varieties compared to the control (100%) varied, and in the case of the Arab variety, it was 100-111%, versus the following: Arden, 102-103%; Bingo, 93-101%; Breton 91-100%; and Maczo, 101-116%. In 2014, the oat grain yield from control plots of the tested varieties ranged from 6.38 (Arab) to 6.97 t \(\times\) ha\({}^{-1}\) (Arden) (Table 6). The use of fungicides from the chemical groups of triazoles and strobilurins allowed yields of 6.37 (azoxystrobin, Arden)--7.49 t \(\times\) ha\({}^{-1}\) (apoxiconazole, Arden) to be obtained. The grain yield of the Maczo variety was clearly lower, ranging from 4.54 to 5.05 t \(\times\) ha\({}^{-1}\). The grain yield of the varieties compared to the control (100%) varied, and in the case of the Arab variety, it was 101-111%, versus the following: Arden, 101-108%; Bingo, 96-104%; Breton, 95-103%; and Maczo, 102-111%. In 2015, the oat grain yield from control plots of the tested varieties ranged from 6.38 (Arab) to 6.97 t \(\times\) ha\({}^{-1}\) (Arden) (Table 6). The use of fungicides from the chemical groups of triazoles and strobilurins allowed yields of 6.37 (azoxystrobin, Arden) \(-\)7.49 t \(\times\) ha\({}^{-1}\) (apoxiconazole, Arden) to be obtained. The grain yield of the Maczo variety was clearly lower, ranging from 4.54 to 5.05 t \(\times\) ha\({}^{-1}\). The grain yield of the varieties compared to the control (100%) varied, and in the case of the Arab variety, it was 101-111%, versus the following: Arden, 101-108%; Bingo, 96-104%; Breton, 95-103% and Maczo, 102-111%. Figure 1: _Drechslera avenue_ and _Puccinia coronata_ infestation and their control using the fungicides azoxystrobin, epoxiconazole, picoxystrobin, and tebuconazole. In 2016, the oat grain yield from control plots of the tested varieties ranged from 4.16 (Bingo) to 4.93 t \(\times\) ha\({}^{-1}\) (Breton) (Table 6). The use of fungicides from the chemical groups of traizoles and strobilurins allowed yields of 4.31 (tebuconazole, Bingo) \(-\)5.18 t \(\times\) ha\({}^{-1}\) (azoxystrobin, Breton) to be obtained. The grain yield of the Maczo variety was much lower, ranging from 2.52 to 3.34 t \(\times\) ha\({}^{-1}\). The grain yield of the varieties compared to the control (100%) varied, and in the case of the Arab variety, it was 102-104%, versus the following: Arden, 100-105%; Bingo, 102-109%; Breton, 100-105%; and Maczo, 85-113%. Table 7 shows the strength of the relationships between plant infection with the fungi _D. avenue, P. coronata_ and humidity and oat yield. Statistical analysis indicates a sufficient correlation between infection with the fungus _D. avenue_ and _P. coronata_ (r = 0.486) in 2013 and a moderate correlation in 2014 and 2016 (r = 0.684; 0.777). The results also indicate a weak negative correlation between _D. avenue_ and the yield in 2012 and 2013. A sufficient-to-moderate negative correlation was also found between humidity and the oat yield (r = \(-\)0.499; \(-\)0.511; \(-\)0.687). The R\({}^{2}\) values indicate that the combined variability of the dependent variables can be explained to a maximum of 60% (in most cases, much lower) by the variability of the independent variables.