Uncinula necator (Schow) Burr., the Causal Agent of Grape Powdery Mildew: Role of Winter and Early Spring Treatments
Uncinula necator (Schow) Burr., prouzrokovač pepelnice vinove loze: značaj zimskog i ranog proletnjeg tretiranja biljaka
Author
Miladinovic, Zoran
Vuksa, Petar
Miletic, Novica
Keywords
Uncinula necatorWinter treatment
Early spring treatment
zimsko tretiranje
rano proletnje tretiranje
Metadata
Show full item recordAbstract
Three preceding articles (Miladinoviæ et al., 2007a, 2007b, 2007c) covered the state-ofthe
art on the pathogen and disease, the source of inoculum and pathogen infection potential,
and the microclimatic conditions of Pogdorica Vineyards.
This segment of the study focuses on winter and early spring treatments of grape vine
for its protection from Uncinula necator, the causal agent of powdery mildew.
The effects of winter and early spring treatments were investigated under production
conditions over a period of three experimental years (2002, 2003 and 2004). Winter
treatment was conducted with products based on DNOC and copper hydroxide, and early
spring with pirazophos. During the rest of the vegetation season, the same treatments
were carried out in all test variants with products based on penconazole, kresoxim-methyl
and sulphur, and their combinations.
Winter treatment with products based on DNOC was found to lead to a significant statistical
decrease in disease intensity, even without any further treatments over the vegetation
season. The products based on copper hydroxide provided weaker protection.
After winter treatment, early spring treatment was not found to have a significant effect.
However, when winter treatment was missing, early treatment in the spring was very important,
especially for the protection of bunches. U ranijim radovima (Miladinović i sar., 2007a, 2007b, 2007c) sagledana su dosadašnja saznanja
o patogenu i oboljenju, izvoru inokuluma i infekcionom potencijalu patogena i mikroklimatskim
uslovima u podgoričkom vinogorju.
Ovim radom obuhvaćeni su zimsko i rana proletnja tretiranja vinove loze radi suzbijanja
Uncinula necator, odnosno njene zaštite od pepelnice.
U proizvodnim uslovima, tokom tri eksperimentalne godine (2002, 2003. i 2004), ispitivan
je značaj zimskog i ranih proletnjih tretiranja. Zimsko tretiranje je obavljano preparatima
na bazi DNOC ili bakaroksihlorida, a rano proletnje preparatom na bazi pirazofosa. U ostalom
delu vegetacije izvedena su ista tretiranja u svim ispitivanim varijantama i to preparatima
na bazi penkonazola, kresoksim-metila i sumpora i njihovih kombinacija.
Utvrđeno je da se zimskim tretiranjem biljaka preparatima na bazi DNOC postiže statistički
značajno smanjenje intenziteta oboljenja, čak i ako se tokom vegetacione sezone ne
vrši suzbijanje pepelnice. Preparatima na bazi bakaroksihlorida postizana je slabija zaštita.
Po obavljenom zimskom tretiranju rano proletnje tretiranje nema poseban značaj. Ali, ako
zimsko tretiranje nije izvedeno, rano tretiranje biljaka ima veliki značaj, posebno sa stanovišta
zaštite grozda.