The effectiveness of potassium phosphite and captan mixture in controlling Venturia inaequalis in apple orchards
Efikasnost mešavine kalijum fosfita i kaptana u suzbijanju Venturia inaequalis u jabučnjacima
Pregled/ Otvaranje
Autor
Aleksic, Goran
Popovic, Tatjana
Starovic, Mira
Kuzmanovic, Slobodanka
Dolovac, Nenad
Josic, Dragana
Gavrilovic, Veljko
Ključne reči
Apple scabPotassium-phosphite
Captan
Effectiveness
Čađava krastavost jabuke
kalijum fosfit
kaptan
efekasnost
Metadata
Prikaz svih podataka o dokumentuApstrakt
Venturia inaequalis is a common apple disease in Serbia and its intensity depends on
weather conditions. The most successful method of combating apple scab is to use a lower
dose of an active ingredient and increase its effectiveness by adding substances that do not
cause environmental damage.
The effectiveness of a fungicide mixture of captan and potassium phosphite against
V. inaequalis was investigated in apple orchards in 2008 and 2009. A relevant EPPO standard
method was used in all trials. Captan 50 WP was used as a standard fungicide. In order to
determine the exact conditions marking the onset of apple infection, key meteorological
conditions were monitored in the orchards using an automated iMetos weather station and a
Lufft electronic instrument. The results showed high efficacy of the tested fungicides which
remained similar in both years of investigation. The intensity of leaf infection after treatment
with the mixture of captan and potassium phosphite was 0.7-2.4%, while fruit infection was
0.5-3.0%. The efficacy of this mixture ranged from 96.3-97.9% on leaves and 87.4-98.7% on
fruits. The standard fungicide Captan 50 WP showed an efficacy ranging from 95.3-96.7%
on leaves and from 87.8-99.3% on fruits. No statistically significant differences were found
between the fungicide tested and the standard fungicide. Venturia inaequalis je široko rasprostranjena bolest jabuke u Srbiji, a njen intenzitet zavisi
od vremenskih uslova. Najuspešniji metod borbe protiv čađave krastavosti jabuke je korišćenje
manjih doza aktivnih materija uz istovremeno povećavanje efikasnosti dodavanjem supstanci
koje ne prouzrokuju štetu u životnoj sredini.
Tokom 2008 i 2009 godine, proučavana je efikasnost fungicidne mešavine kaptana i
kalijum fosfita protiv V. inaequalis u jabučnjacima. U svim ogledima je korišćen standardni
EPPO metod. Captan 50 WP je korišćen kao standardni fungicid. Kako bi se tačno odredili
uslovi za početak zaraze na jabuci, praćeni su osnovni meteorološki parametri u voćnjacima
pomoću iMetos stanice i elektronskog uređaja Lufft. Rezultati su pokazali visoku efikasnost
testiranih fungicida koja je bila slična u obe godine istraživanja. Intenzitet zaraze lista nakon
tretmana mešavinom kaptana i kalijum fosfita bio je 0.7-2.4%, dok je zaraženost plodova bila
0.5-3.0%. Efikasnost mešavine bila je 96.3-97.9% na listovima, a 87.4-98.7% na plodovima.
Standardni fungicid Captan 50 WP pokazao je efikasnost u opsegu 95.3-96.7% na listovima
i 87.8-99.3% na plodovima. Nisu konstatovane statistički značajne razlike između ispitivanog
i standardnog fungicida.