The pH Value of Fungicide, Insecticide and Mineral Fertilizer Mixtures Depending on Water Quality
Vrednosti pH mešavina fungicida, insekticida i kompleksnih đubriva, zavisno od kvaliteta vode
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Author
Indjic, Dusanka
Perovic, Zdravko
Vukovic, Slavica
Klokocar-Smit, Zlata
Keywords
pHPropineb
Mancozeb
Pirimiphos-methyl
Imidacloprid
Ferticare (I, II, III)
Wuxal super
Mixtures
Water quality
mankozeb
mešavine
kvalitet vode
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The paper deals with the effect of water quality on the pH value of fungicides, insecticides,
mineral fertilizers and their mixtures. The fungicides propineb (Antracol WP-70) and
mancozeb (Dithane M-70), insecticides pirimiphos-methyl (Actellic-50) and imidacloprid
(Confidor 200-SL), several fertilizers (Ferticare I, Ferticare II, Ferticare III and Wuxal Super) and
their mixtures were analyzed for pH value under laboratory conditions using a potentiometric
pH meter. Measurements were made directly after preparation or mixing with tap
and well water and 24 hours later.
Tap water exhibited a neutral reaction. A slightly alkaline reaction of well water was most
likely due to high ammonium content. The suspensions of Antracol WP-70 exhibited slightly
alkaline reactions with both water types during 24 hours. The spray liquids of Dithane
M-70 mixed with tap or well water had neutral reaction after preparation and slightly alkaline
reaction after 24 hours. The emulsions of Actellic-50 showed neutral reaction with both
water types, followed by a pH increase in tap water after 24 hours. The solutions of Confidor
200-SL had a slightly alkaline reaction after mixing and the pH value increased with both
water types after 24 hours. It is therefore recommended to apply these insecticides directly
after preparation. Mineral fertilizers considerably reduced pH values of the fungicide and
insecticide components in double and triple mixtures, especially Ferticare nutrients which
had a moderately acid reaction. Wuxal Super had a neutral reaction with both water types.
The mixtures with well water increased pH values, which indicates that water pH does
affect the pH value of the mixture. Both individual fertilizers and all mixtures (double and
triple) with Ferticare had pH values between 2.4 and 6, which allows their active liquids to
be stored for 12 to 24 hours. The suspensions (Antracol WP-70, double and triple mixtures),
emulsions (Actellic-50 and Actellic-50+Wuxal Super) and solutions (Confidor 200-SL, Wuxal
Super and Confidor 200-SL+Wuxal Super) had pH values between 6.7 and 7.9; therefore,
the optimum time of their application, especially in case of the mixtures with well water, is
immediately after preparation. The suspensions of Dithane M-70 with the insecticides and
Ferticare III showed moderately acid reactions with tap water and slightly acid reactions
with well water.
Since both individual components and their mixtures showed slightly higher pH values
with well water than with tap water, it was an indication that water pH may affect the pH
value of active liquids. U radu su prikazane vrednosti pH fungicida, insekticida, kompleksnih đubriva i njihovih
mešavina, zavisno od kvaliteta vode. U laboratorijskim uslovima određene su vrednosti pH
fungicida propineb (Antracol WP-70) i mankozeb (Dithane M-70), insekticida pirimifos-metil
(Actelic-50) i imidakloprid (Confidor 200-SL), kompleksnih đubriva (Ferticare I, Ferticare II i
Ferticare III i Wuxal super) i njihovih mešavina, i to odmah po pripremi ili mešanju i posle 24
časa u česmenskoj i bunarskoj vodi.
Česmenska voda je ispoljila neutralnu reakciju, a bunarska slabo alkalnu. Suspenzija
Antracol WP-70 je ispoljila slabo alkalnu reakciju u obe vode tokom 24 h. Radna tečnost
Dithane M-70 je neutralne reakcije u obe vode posle spravljanja, dok je slabo alkalne posle
24 h. Emulzija Actellic-50 je neutralne reakcije u obe vode, uz porast pH u česmenskoj tokom
24 h, a rastvor Confidor 200-SL je slabo alkalne reakcije sa porastom vrednosti pH do
24 h u obe vode, što uslovljava primenu ovih insekticida odmah po pripremi. Kompleksna
đubriva su znatno uticala na smanjenje vrednosti pH fungicidne i insekticidne komponente
u dvojnim i trojnim smešama, a posebno đubriva Ferticare koja su umereno kisele reakcije.
Wuxal super je ispoljio neutralnu reakciju u obe vode. Vrednosti pH smeša su veće u bunarskoj
vodi, što ukazuje da pH vode utiče na pH smeše. Kako pojedinačna đubriva, tako i sve
mešavine (dvojne i trojne) sa komponentom Ferticare su pH vrednosti od 2,4 do 6, što dozvoljava
čuvanje radne tečnosti 12 do 24 h. U suspenzijama (Antracol WP-70, dvojne i trojne
mešavine), emulzijama (Actellic-50 i Actellic-50+Wuxal super) i rastvorima (Confidor 200-
SL, Wuxal super i Confidor 200-SL+Wuxal super) reakcije sredine su neutralne ili slabo alkalne,
zavisno od komponenti, odnosno vrednost pH se kretala od 6,7 do 7,9, pa bi optimalno
vreme primene pomenutih smeša, naročito u bunarskoj vodi bilo odmah po mešanju odnosno
pripremi. Suspenzija Dithane M-70 sa insekticidima i Ferticare III je u česmenskoj vodi
umereno kisele a u bunarskoj slabo kisele reakcije.
Kako pojedinačne komponente tako i smeše su pokazale, iako neznatno, veće pH vrednosti
u bunarskoj u odnosu na česmensku vodu, što ukazuje da pH vode može uticati na
pH radnih tečnosti.