الفهرس 
Morphological studies Weight of larvaeOnly 14 pages are availabe for public view
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Abstract
This work was carried out during period spring through three years
2010, 2011 and 2013 in Sericulture research Laboratory in Faculty of
Agriculture, South Valley University in Qena Governorate, Egypt.
The aims of this work to evaluate of two mulberry types leaves used
for feeding Silkworm, Bombyx mori L. Mulberry leaves which treated
with Pollen grains and propolis were used for feeding of 4
th
and 5
th
instar
larvae of silkworm. The following criteria and obtained results were as
follow:
A. Morphological studies:
1.Weight of larvae:
Fourth instar:
Maximum mean of larval weight in 4
th
instar was 1.067, 1.019 and
0.715 gm with feeding on black mulberry leaves during years 2011, 2013
and 2012, respectively. And in white mulberry leaves was 0.940, 0.776
and 0.732 gm. through years 2011, 2012 and 2013, respectively.
Maximum gain of larval weight, during 4
th
was 1.067g in black mulberry
leaves and in white mulberry leaves was 0.940 gm. Average weight of
larvae in 4
th
instar was ranged from 0.497 to 0.933 gm. in black mulberry
leaves, while in white mulberry leaves was ranged from 0.631 to
0.802gm Fifth instar:
While in 5
th
instar was 3.423, 3.397 and 3.292 in black mulberry
leaves through years 2013, 2012 and 2011 respectively. And in white
mulberry leaves was 1.986, 1.789 and 1.770 during years 2011, 2013 and
2012, respectively., Maximum gain of larval weight, during 5
th
instar was
3.423 in black mulberry leaves and in white mulberry leaves was 1.986 gm. Average weight of larvae in 5
th
instar was ranged from 0.738 to 3.364
gm. in back mulberry leaves, and white mulberry leaves was 0.781 to
1.769 gm.
The resulted had significant differences in durations of the fourth and
fifth instars of the two leaves of mulberry.
On the other hand, the weight of fourth and fifth larvae instars which
on back mulberry leaves gave the weight highest of larvae that fed on
white mulberry leaves. The resulted had no significant differences when
feeding on mulberry leaves on weight of 4
th
and 5
th
instars larvae during
2011, 2012 and 2013 years.
2. Effect of different supplements on the weight of larvae:
a) Add Pollen grains:
Fourth instar:
Maximum mean of larval weight in 4
th
instar was 1.058, 0.972 and
1.055gm with feeding on Pollen grains additive to black mulberry leaves
during years 2011, 2012 and 2013, respectively. And in white mulberry
leaves was 0.860, 0.866 and 0.872 gm. through years 2011, 2012 and
2013, respectively.
Fifth instar:
Maximum mean of larval weight in 5
th
instar was 3.595, 3.913
and3.743 in black mulberry leaves when add Pollen grains through years
2011, 2012 and 2013, respectively. And in white mulberry leaves was
3.481, 2.836 and 3.605 during years 2011, 2012 and 2013, respectively.