Materials of this chapter were also published in: Ryabchinskaya, T.A., Kharchenko.G.L.,
Sarantseva, N.A.(2005) New phytoactivator of resistance to diseases. Plant Protection and
quarantine. Nr.4, p. 26-27.
Black currant (Ribes nigrum L, order Saxifragaceae) is one of the
most important berry cultures in Russia. Berries of black currant are valuable food
substance, reach in vitamins (especially vitamin C), pectins and minerals. Due to
labour-intensiveness of organizations of new plantations, it is especially important
to increase productiveness of already available ones. Application of biostimulants
helps to get additional organic production.
Influence of Albit on black currant was examined in trials carried out by All-Russia
Institute of Plant Protection and All-Russia Institute of Vegetable Selection and Seed
Breeding (2001-2003) in Voronezh and Moscow oblasts on currant varieties Belorusskaya
sladkaya, Minay Shmyrev and Golubka.
Averagely, according to results of the trials, treatment with Albit increased
yield of black currant by 10.8 centners/hectare (34.6% over control).
Analysis of yield-forming elements revealed, that Albit stimulates setting
of berries and their further growth. The biostimulant increased number of flowers
by 9-10% and increased setting of berries by 9-13% over control. After double
or triple application of Albit, leaf assimilation surface was increased 1.2-1.3
fold, chlorophyll content - by 6-12%, annual increment of shoot growth - by
10-30% over control. Versatile activity of Albit (fungicidal effect against
American gooseberry mildew, immunity and growth stimulating effects) provides
harvesting of good resulting yield.
Albit demonstrated high Biological efficiency (BE) against American gooseberry
mildew (caused by Sphaerotheca mors-uvae Berk. et Curt.); the average
BE is 71.2%, the minimal one is 58%. Fungicidal activity of Albit was observed at
disease prevalence of 2-8% and disease development of 2-49%. Albit is officially
registered in Russia as fungicide against this disease.
Albit also improves yield quality of black currant: increases
content of vitamin C in berries by 5.8-13.8 relative %. Also, treatments with Albit
increase size of berries (by 10-20%) and provide more simultaneous ripening. In conducted
trials, economical or biological effectiveness of Albit was not inferior to that of
formulations based on Pseudomonas fluorescens, Pseudomonas aureofasciens
and arachidonic acid.
Application recommendations. It is recommended to perform
double or triple foliar spraying of currant plants starting from budbreak/budding
stage with 25-30 days interval. Application rates are 50 ml of Albit or 500-600
liters of working solution per hectare. On small plots (when calculation per
hectare is quite difficult) plants can be watered with Albit solution, 1 ml/10
L of water providing full moistening of leaves. Albit suppress development
of American gooseberry mildew for 1 month, therefore interval between treatments
must be 25-30 days. Application of Albit is most effective in budbreak/budding
stage; it provides more versatile multifunctional activity of the biostimulant,
especially induction of natural immunity of plants. In case of epiphytoty,
the additional (third) treatment is necessary.
According to conclusion of All-Russia Institute of Plant Protection, inclusion of Albit
into system of black currant protection is quite promising for decreasing injuriousness
of main phytopathogenic objects and increasing productivity. Application of Albit helps
to decrease consumption of chemical fungicides or to reject them completely, that is
especially important for production of childТs and dietary feeding, and provides considerable
economical effectiveness Ц up to 7500 roubles/hectare. Average
profitability of Albit application is 2300%.