Abstract:
This study aims at monitoring the dynamics of the occurrence and evolution of the attack of some pathogenic agents to
French wheat variety, Airbus. Among these, we mention: Puccinia recondita f. sp. tritici (sin. Puccinia triticina) (fig. 1)
which produces wheat’s brown rust and Septoria sp. which produces wheat’s brown leaf spotting (septoriosis). Also, the
influence of applying these fungicides on the production, as compared to the untreated control variant, was monitored.
One experiment with 7 variants (6 variants with phytosanitary treatment, plus one control variant not treated) was taken
into consideration for this study, for which the following phytosanitary products were used, as follows: EVOLUS
(prochloraz 320 g/l, tebuconazole 160 g/l, proquinazid 40g/l), AMISTAR (azoxystrobin 250 g/l), FALCON PRO
(prothioconazole 53 g/l, spiroxamine 224 g/l, tebuconazole 148 g/l), TOPSIN 500 SC (thiophanate-methyl 500 g/l),
ORIUS 25 EW (250 g/l tebuconazole), DITHANE M 45 (mancozeb 80%). The treatment variants were the following:
EVOLUS 0,75 L/HA - 1 treatment applied at spike’s releasing - 23.05.2020, V2 - AMISTAR 0.75 L/HA - 1 treatment
applied at spike’s releasing - 23.05.2020, V3 - FALCON PRO 0.6 L/HA - 1 treatment applied at spike’s releasing -
23.05.2020, V4 - ORIUS 25 EW 0.5 L/HA + TOPSIN 500 SC 1.0 L/HA - 1 treatment applied at spike’s releasing -
23.05.2020, V5 - ORIUS 25 EW 0.5 L/HA 1 + DITHANE M 45 2 KG/HA - 1 treatment applied at spike’s releasing -
23.05.2020, V6 - TOPSIN 500 SC 1.0 L/HA + DITHANE M 45 2 KG/HA - 1 treatment applied at spike’s releasing -
23.05.2020, V7 - Untreated control valiant. The experiment was placed in Latin square; the 7 variants being placed in 7
repetitions. The experiment was performed under irrigation conditions. The year 2020 was one of the driest years in the
last 3 decades. Among the pathogenic agents under monitoring, Puccinia recondita f.sp. tritici fungus producing the
brown rust had produced the greatest attacks. The attack of the fungi from Blumeria (Erysiphe) variety, producing
wheat’s mildew, was rare. No attacks of fungi from Septoria sp. variety producing leaf’s brown rust (septoriosis) were
observed. The first two leaves placed under the spike had been analyzed for the above. These observations had led to
the conclusion that for all 6 treatment variants, the degree of attack (D.A. %) of Puccinia recondita f.sp. tritici fungus
was more reduced than at the untreated control variant.
