Leptosphaeria maculans - Evaluation
Entire data about trials

Winter 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 30.5. 25.4 34   Yes           24,48 AB %90 low
2001 69 9.5. 61     Yes         24,83 AB  
    9.5. 61     Yes   Yes     26,57 B  
median                     25,29    
ref. prep.   25.4. 34           ROV Yes 19,58 AB  
                           
Kujavy 18.6. 6.4. 30 - 32   Yes     Yes     23,33 B %90 low
2001 71 - 73 24.4. 50 - 51     Yes   Yes     11,67 AB  
    24.4. 50 - 51     Yes   Yes     15,00 AB  
median                     16,67    
ref. prep.   9.5. 63 - 65           ROV Yes 10,00 AB  
                           
Krás. Údolí 24.7. 27.4. 30   Yes           46,65 BC %99 medium
2001 85 8.5. 32     Yes         48,28 BC  
    8.5. 32     Yes         53,57 C  
median                     49,49    
ref. prep.   27.4. 30           HOR Yes 38,61 BC  
                           
Strong infestation 1.6. 27.4. 30   Yes           54,80 AB %90 strong
  71 - 73 8.5. 32     Yes         71,90 B  
    8.5. 32     Yes         54,80 AB  
median                     60,29    
ref. prep.   27.4. 30           HOR Yes 62,15 AB  
                           
med. infestation 1.6. 27.4. 30   Yes           47,52 B %90 low-med.
  71-73 8.5. 32     Yes         66,61 BC  
    8.5. 32     Yes         72,20 C  
median                     62,11    
ref. prep.   27.4. 30           HOR Yes 70,50 BC  
                           
Nechranice 17.6. 17.4. 34   Yes         Yes 49,64 B %90,99  
2002 79 30.4. 60   Yes Yes         66,19 B  
    24.4. 50             Yes 68,35 B  
median                     60,73    
ref. prep.   17.4. 34           CAR   56,12 B  
                           
Opava 24.5. 9.4. 33   Yes           10,80 A %90,99 weak
2002 71 16.4. 51 - 52   Yes   Yes       3,98 A  
root collar   23.4. 53 - 57     Yes         17,50 A  
median                     10,76    
ref. prep.   9.4. 33           CAR Yes 14,20 A  
                           
plant 9.7.       Yes           11,96 A %90,99 low
  81       Yes   Yes       7,61 A  
                      6,52 A  
median                     8,99    
ref. prep.                 CAR Yes 3,26 A  
                           
Krásné Údolí 4.6. 21.4. 30     Yes         18,40 A %90,99 medium
2002 67 4.5. 31     Yes         14,40 A  
    28.4. 51       Yes       27,24 A  
median                     20,10    
ref. prep.   21.4. 30           CAR Yes 49,02 A  
                           
  15.6.         Yes         50,36 B, A 95,99%
  75         Yes         55,39 B, AB medium
              Yes       57,50 B, AB  
                      54,42    
                  CAR Yes 71,77 B,B  
                           
Domanínek 15.7.                        
2002 87 17.4. 30     Yes         14,40 A weak
    26.4. 39     Yes   Yes     6,52 A  
    7.5. 60       Yes       6,52 A  
                      13,33    
                  CAR Yes 15,13 A  
                           
Krásné Údolí                          
2004 24.4. 5.11. 14     Yes         17,07 B medium
  85 22.4. 30     Yes         14,63 B  
    30.4. 39       Yes       15,45 B  
median                     15,72    
ref. prep.                 CAR   15,45 B  
                           
  13.6.         Yes         16,11 B medium
  85         Yes         31,83 C  
              Yes       11,41 B  
median                     19,78    
ref. prep.                 CAR   19,16 B  
                           
  24.11.         Yes         2,80   weak
            Yes         4,67    
              Yes       5,61    
median                     4,36    
ref. prep.                 CAR   3,74    
                           
Nechanice 3.6. 30.9. 15     Yes         48,28 B medium
2004 69 9.4. 33     Yes         62,07 B  
              Yes       64,37 B  
median                     58,14    
ref. prep.                 CAR   66,67 B  

Legend to tab “Leptosphaeria maculans”

Application of POLYVERSUM
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.

Comments:
Testing of preparation POLYVERSUM was done in 10 trials a preparation was compared with fungicides Rovral, Caramba, Horizon, Vitavax 200 FF. Mentioned preparations were applied to winter and summer canola in combination with plant growth stimulator Atonik as states in tabs.
Polyversum was applied 48 times.
In 30 cases was reached better evaluation than by reference fungicide treatment.
In 7 cases was efficiency of Polyversum higher than 50 %, but lower than efficiency of chemical preparations.
In 11 cases were results of tested biopreparation worst than chemical standard.

The preparation was applied in one, two or three terms – growth stages of canola.
First treatment in stages (BBCH) 18 -25
Second treatment in stages (BBCH) 30 - 38
Third treatment in stages (BBCH) 45 – 60

Application is fully in correspondence with recommendation of manufacturers of referential fungicidal standards. (BBCH 11-32 and 32- 60)

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

Gained values are seemingly non-homogenous. That is reason, why was calculated correlation coefficient between group treated with chemical fungicides and between group treated with Polyversum. Because value of this coefficient is 0.886 is correlation between both groups very tight.
(Tab value for a 0.005 – 16 terms is 0.6622). 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