Studies on Effectiveness of Nemahari Against RootKnot Nematode Disease Meloidogyne incognita ofMulberry to Reduction of Cocoon Yield Losses ofBivoltine Silkworm In Pune Region

ABSTRACT
The Nemahari is an ecofriendly a plant based
formulation for management of root knot disease
and plant extracted products from Azadirachta
species and utilize to soil application to prevent
the root knot nematode severe infection of
mulberry and does not harm the beneficial
microflora in soil which is more effective to
inhibits the multiplication of nematode galls
and Root-knot disease of mulberry is caused
by the nematode Meloidogyne incognita. It has
important economic implications for sericulture.
and found its infection with counting more than
50 galls per plant in pune region, of Maharashtra
and its noticed caused by 8-10 percentage is
losses the foliage production of mulberry which
is affects to quality and quantum in cocoon
production per unit area. objectives are attempts
to prevent the multiplication of nematode
and reduction of galls per plant the botanical
nematicide or biopesticide was prepared as
nemahari even make a study16kg mix with 160
kg farm yard manure to apply this mixture in the
trench along root zone area of plant in the depth
15 cm and covered with the soil and repeated
after 70-80 days, in field of mulberry (Morus
sp L.) is effectively. The mulberry infected
with Meloidogyne incognita juveniles (J2).
Pretreatment (ending 6 days before inoculation)
and post-treatment (starting 6 days after
inoculation) schedules were tested. The two
uninoculated control batches were treated with
the same procedure with nemahari Both pre- and
post-treatment significantly reduced nematode
infection in terms of root gall number and
nematode population in roots of mulberry. All thetreated plants showed improved growth in terms
of fresh biomass of shoot and root, length of
shoot and root, num of leaves, leaf surface area,
root and leaf-protein content. is more effective
in all respects of nematode control as well as
growth of the test plants. Pretreatments show
slightly better effects than the post-treatments.
It is interesting that inoculated and treated
plants not only are less affected by nematodes
but also have a better growth than uninoculated,
untreated control. This biopesticide is more
useful measure in control of nematode infection
of mulberry
Keywords –
Mulberry, Meloidogyne incognita
Azadiractica,. Bivoltine silkworm
INTRODUCTION
Mulberry, the sole food source of silkworm
Bombyx mori is prone to many diseases caused
by fungi, bacteria, viruses, mycoplasma and
nematodes. These microorganisms are the main
obstacles causing considerable loss in yield and
nutritive values of mulberry foliage (Chanturia,
1963; Shree etal., 1986; Shree and Umesh
kumar, 1991).These diseases cause 10-30% leaf
yield loss reducing the quality. Root knot disease
caused by nematode Meloidogyne incognita is a
serious one and causes 10-12% leaf yield loss.