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General
- Umezawa and coworkers
discovered kasugamycin as a bactericidal and fungicidal metabolite of Streptomyces
kasugaensis.
- Kasugamycin (Ksg)
is an aminoglycoside antibiotic that was originally isolated in 1965,
from Streptomyces kasugaensis
- Kasugamycin is recommended for the
control of rice blast (P. oryzae; perfect stage M. grisea) in rice, leaf
spot in sugar beet and celery (Cercospora spp.), bacterial disease in
rice and vegetables and scab (Venturia spp.) in apples and pears.
- Kasugamycin acts as an inhibitor of
protein biosynthesis in microorganisms.
- Kasugamycin is less phytotoxic than
blasticidin-S with a wider margin between curative and phytoxtoxic
concentrations.
- Kasugamycin is mainly applied as a
dust and can also be used as a seed treatment as a wettable powder.
Uses
- Anti-biotic used for
clinically bacterial infection, especially to bacillus coli and
bacillus pyocyaneus.
- Agricultural fungicide
used to treat rice blast, cucumber anthracnose, cucumber angular
leaf spot, tomato gray mold, cabbage black rot and citrus gummosis
- Control of fungal and bacterial
diseases affecting rice, vegetables and fruit.
- In sugar beet, it controls
Cercospora beticola, at 80-100 g/ha.
- On rice, it controls diseases
caused by Pyricularia oryzae and Burkholderia glumae (bacterial
grain rot), with ground and aerial applications, at 20-30 g/ha, and
seedling diseases caused by various bacterial pathogens, at 0.3-0.6
g/box.
Report
- Research shows that Kasugamycin can associate with the 30s
ribosomal subunit, which results in the indirect inhibition of
the P-site tRNA binding, and blocks protein synthesis.
- Kasugamycin was effective
against fire blight caused by isolates of E. amylovora that were
streptomycin/oxytetracycline-sensitive or -resistant.
- Kasugamycin efficacy
equivalent or better than terramycin or streptomycin.
- Kasugamycin resistant mutants
from a large number of conidia of finger millet isolates, and
proved that resistance of a certain mutant was controlled by a
single major gene. In the present paper, further studies on
genetical control of kasugamycin resistance in P. oryzae will be
presented with special reference to identification of three
different resistance loci.
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