Sclerotinia sclerotiorum - Evaluation
Entire data about trials

Summer Canola

Locality
Year 		Growth stage
of Canola (BBCH)		 Date Growth stage
of Canola (BBCH)		 Seed Dressing 1x 2x 3x DAM Ref. prep. Atonik % Efficiency Stat. Cogency Infestation
Domanínek 5.9. 17.4. 0 Yes             -13,04 A %90,99 weak
2001 85 25.5. 13   Yes           47,83 A  
    8.6. 15     Yes         30,43 A  
median                     21,74    
ref. prep.   17.4. 0           VITA   0 A  
                           
Krás. Údolí 28.8. 25.4.   Yes             39,33 B, B, B medium
2001 83 - 85 31.5. 13 Yes Yes           42,37 BC, BC, B 90,95,99%
    15.6. 19 Yes   Yes         58,06 C, C, B  
median                     46,59    
ref. prep.   31.5.             CAR   55,87 BC, C, B  

Legend to tab “Sclerotinia sclerotiorum”

Application of POLYVERSU
Seed dressing – dry Seed dressing 2000g per ton of seed
1x spray 100g/ha
2x two sprays 100g /ha
3x three sprays 100g/ha
DAM 120 l of nitrogen liquid fertilizer per hectare in first treatment

Chemical treatment
VITA - seed dressing with Vitavax 200 FF - 4 l/t
Sprays:
ROV - Rovral – 1.5 l/ha
CAR - Caramba – 1.5 l/ha
HOR - Horizon – 1.5 l/ha
Atonik – 0.6 l /ha

Red written values are up the chemical reference.
Green written values are under the chemical reference.
Blue written values are under the chemical reference, but with efficiency up 50 %.
Purple written values show efficiency of referential preparation.

Commentary:
Testing of the preparation POLYVERSUM was carried out in 9 trials and compared with preparations Rovral, Caramba, Horizon and Vitavax 200 FF.
Mentioned preparations were applied to winter and summer canola in combination with plant growth stimulator Atonik as states in tabs.
The applications of Polyversum were carried out 30 times.
In 23 cases was reached better evaluation than by reference fungicide treatment.
In 2 cases was efficiency of Polyversum higher than 50 %, but lower than efficiency of chemical preparations.
In six cases were results of tested preparation worst than chemical standard

Applications of referential preparation were carried out in growth stage of the crop: BBCH 18 –25 by summer canola or BBCH 30 – 52 by winter canola

Application is fully in correspondence with recommendation of manufacturers of referential fungicidal standards. (BBCH 18-25 and 30- 52)

Infection ascends in time of observations from low to medium pressure.

Gained values are seemingly non-homogenous. That is reason of calculating correlation coefficient between groups treated with chemical fungicides and between groups treated with Polyversum. Because value of coefficient for 10 terms is 0.7143 is correlation between both groups very tight.
(Tab value for a 0.025 – 10 terms is 0.6319).
Low values by both groups are caused of other events than is tested preparation. This fact confirms contradictory phenomenon – High efficiency in both assessed files in the same locality. These phenomena - high or low efficiency – are identically influenced either by force of infection, climatic conditions in specific locality or condition of the crop. In the case of occurrence and development of pathogen, the both groups show high efficiency.

From above results, that efficiency of preparation Polyversum is comparable with chemical standards- this is documented by statistical cogency – and is influenced by instantaneous condition of environment as well as artificial fungicides.

As the best method of application appear two or three sprays.
First treatment in stages (BBCH) 25 – 30
Second treatment in stages (BBCH) 35 – 45
Third treatment in stages (BBCH) 45 - 55

The application with liquid fertilizer DAM 390 is possible.

For practical application is suitable to modify application window as is showed:
Treatment
Growth stage of canola
1
BBCH 15 - 30
2
BBCH 30 - 40
3
BBCH 40 - 65