Agriculture Reference
In-Depth Information
Chapter 6
S
UGAR
B
EET
Q
UALITY IN
D
EPENDENCE
ON THE
E
FFECTIVENESS OF
F
UNGICIDES AND
G
ENOTYPE ON
C
ERCOSPORA BETICOLA
S
ACC
A. Kristek
1
, S. Kristek
1
, R. Bažok
2
, I. Rešić
1
and I. Varga
1
1
University of J. J. Strossmayer, Faculty of Agronomy, Osijek, Republic of Croatia
2
University in Zagreb, Faculty of Agronomy, Zagreb, Republic of Croatia
A
BSTRACT
Sugar beet is one of two the most important industrial cultures for sugar production.
A large number of factors have an impact on the achieved results in the sugar beet
production, whereby the most important one is the appearance and development of leaf
disease caused by
C. beticola
Sacc. In the area where sugar beet is grown, the damage by
this fungal plant patogen is large. It depends on the cropping practices, abiotic factors,
quality and quantity of the composition of microorganisms in the soil and the disease
control measures. Application of tolerant hybrids has become a rule in the areas where it
is cultivated sugar beet. By breeding were obtained tolerant hybrids against this pathogen,
on the other side, this tolerance did not influence the yield reduction, as it was the case
with the first obtained tolerant hybrids to fungus
C. beticola
Sacc. Application of
fungicides is necessary for sensitive and tolerant sugar beet hybrids. The efficiency of the
treatment depends on the application time, number of applications and the choice of
fungicide - contact or sistemic. Furthermore, it is extremely important to choose the right
active substance of fungicide, which means do not use twice the same active substance,
or combine two or more active substances in order to avoid the development of
resistance. For these reasons, the aim of this study was to determine root yield and root
quality of sugar beet under different climate and soil conditions in dependence of
fungicide efficiency and the tolerance to fungus
Cercospora beticola
Sacc. of the studied
hybrids. Research of production values 8 hybrids were performed on eutric brown soil in
eastern Croatia in the conditions of natural infection with a pathogenic fungus
Cercospora beticola Sacc.
with and without fungicide application since 2010. until 2012.
Hybrids involved in the experiments are unequal tolerance to the fungus
C. beticola
and
E - mail: akristek@pfos.hr
