Mitteilungen der Gesellschaft für Pflanzenbauwissenschaften Band 23

121
strobilurin fungicide (azoxystrobin) alone and in combination with azole group of
fungicides delayed senescence and increased LAI. Alone application of azole
reduced LAI, but in combination with strobilurin increased it significantly. Tebuconazole
alone and in combination with azoxystrobin (No. 2 and 13) reduced height
of plant stand as well as seed yield, while increased protein content over other
fungicidal treatments. Minimal value of oil content with maximum concentration of
linoleic acid was obtained with application of moddus (No. 9) over other treatments.
Application of fungicides did not exceed the hazardous limits for values of FFA and
PV. No obvious difference in the concentration of saturated and unsaturated fatty
acids was observed among fungicidal treatments and control. Sulphur application
increased seed yield as well as concentration of glucosinolates of rapeseed.
Table 1: Effect of fungicides (triazole, strobilurin) and growth regulator (trinexapac)
on growth, yield and quality parameters of winter rapeseed under two levels of
sulphur
+ Treat.
LAI
BBCH 70
PS (cm)
BBCH 62
Yield
(dt/ha)
Oil (%) Protein
(%)
GSL
(mmol/g)
FFA
(%)
PV
(meq/kg)
Linoleic
acid (%)
1 5.51e 139.4abcd 33.2 44.9cd 17.7 13.5 0.46e 3.17g 19.6b
2 5.59de 134.4f 33.3 45.7ab 18.4 14.2 0.49de 3.62cdef 19.5bc
3 5.76cde 136.6cdef 33.5 45.2bcd 18.0 12.8 0.52cde 4.53a 19.5bc
4 6.04abc 142.2a 36.9 45.3bcd 17.9 13.3 0.55bcde 3.46efg 19.3cd
5 5.78cde 137.8bcdef 36.5 45.7ab 18.0 12.8 0.49de 3.39fg 19.4bcd
6 5.90abcd 139.1abcde 35.3 45.1bcd 17.5 13.1 0.54bcde 4.00bc 19.3cd
7 5.91abc 139.7abc 36.7 44.8cd 18.2 13.7 0.59abc 3.52defg 19.5bc
8 5.94abc 138.1bcdef 35.6 45.0bcd 17.9 12.6 0.57abcd 4.02 bc 19.6b
9 5.73cde 135.3def 34.6 44.6d 17.8 11.9 0.51cde 3.92bcd 19.9a
10 5.84bcd 141.6ab 36.1 45.5bc 17.8 13.0 0.54bcde 3.93bcd 19.3cd
11 5.76cde 140.6abc 35.7 45.2bcd 17.7 12.7 0.53bcde 3.96bc 19.5bc
12 6.16a 141.3ab 37.0 46.3a 17.7 12.2 0.65a 4.16ab 19.4bcd
13 5.96abc 135.0ef 34.9 45.5bc 18.4 13.4 0.59abc 3.32fg 19.2d
14 6.14ab 138.8abcde 35.6 45.4bc 17.8 12.8 0.62ab 3.85bcde 19.5bc
LSD0.05 0.31 4.20 ns 0.72 ns ns 0.10 0.41 0.24
S1 5.85 139.8a 34.9 45.3 17.9 12.4b 0.57a 2.68b 19.6 a
S2 5.87 137.3b 35.8 45.3 17.9 13.6a 0.52b 4.87a 19.3 b
LSD0.05 ns 1.60 ns ns ns 0.52 0.04 0.16 0.09
+ 1= Control, 2= Tebuconazole (188.4 g ha -1 ) 3= Metconazole (60 g ha -1 ) 4= Boscalid (125 g ha -1 ) 5=
Prothioconazole + Tebuconazole (93.8 g ha -1 + 93.8 g ha -1 ) 6= Prothioconazole (125 g ha -1 ) 7= Flusilazole +
Carbendazim (187.5 g ha -1 + 93.8 g ha -1 ) 8= Trinexapac + Ethylester (111 g ha -1 + 125 g ha -1 ) + Boscalid (125 g
ha -1 ) 9= Trinexapac + Ethylester (111 g ha -1 + 125 g ha -1 ) 10= Azoxystrobin (250 g ha -1 ) 11= Difenoconazole +
Paclobutrazole, (125 g ha -1 + 62.5 g ha -1 ) 12= Difenoconazole + Paclobutrazole (125 g ha -1 + 62.5 g ha -1 ) +
Azoxystrobin (250 g ha -1 ) 13= Tebuconazole (251.2 g ha -1 ) + Azoxystrobin (250 g ha -1 ) 14= Metconazole (60 g
ha -1 ) + Azoxystrobin (250 g ha -1 ), S1: 0 kg Sulphur/ha S2: 72kg Sulphur/ha
It can be concluded that inclusion of strobilurin in azole group of fungicides have
the ability to improve morphological structure of rapeseed plant result in more upright
canopy which is less susceptible to diseases and lodging. This modification of the
canopy allows better penetration of light and may result in considerably improved
growth, yield and quality parameters of winter rapeseed.
References
Zhou, W., M. Leul. 1998: Uniconazole-induced alleviation of freezing injury in relation to changes in
hormonal balance, enzyme activities and lipid peroxidation in winter rape. Plant Growth Regulation
26:41-47.