Publication: Effects of black boxing duration on the hatching performance of silkworm egg
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Date
1998-03
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Publisher
Don Mariano Marcos Memorial State Univeristy - South La Union Campus
Abstract
This experimental study was conducted at DMMMSU-NLUC. Bacnotan, -
La Union from December 1996 to January 1997, to determine the effects of
black boxing duration on the hatching performance of silkworm eggs.
Specifically, it sought to answer the following questions:
1. What is the effect of black boxing duration on the hatching
performance of silkworm eggs In terms of:
a.) percentage nurnber of hatched eggs
b.) percentage number of unhatched eggs, and
c.) percentage number of dead eggs
2. What is the best black boxing duration on the hatching performance
of silkworm eggs?
There were 9 layings which were distributed Into 3 treatments: T1- 2
days, T2- 3 days (control), and T3- 4 days. The Completely Randomized
Design (CRD) was used in this study.
The Analysis of Variance (ANOVA) was used to determine whether the
differences betwen and among treatment means is significant set at 0.05
and O.O~ levels. The, Duncan's Multiple Range Test (DMRT) was also us to
analyze further the' differences within the treatments.
To determine the effect of black boxing duration, counting was done as
to the color of the eggs: milky white color- hatched eggs; black color-hatched eggs; and brown color- dead eggs. This was done by using
microscopes.
According to our findings, T1 and T2 are the best duration of -black
boxing because they have the higher percentage number of hatched eggs. In
T1 98% of hatched eggs were produced, while T2 has 99% of hatched
eggs. This means that both T1 and T2 are comparable and either treatment
could be used in synchronizing egg hatching.
According to our findings two days and three days are the best
duration of black boxing because they have the highest percentage number
of hatched eggs.
On the other hand, T3 (4 days) or prolonged black boxing affects the
hatching performance of silkworm eggs. The longer H was subjected to black
boxing, the more dead and/ or unhatched eggs result.
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Citation
Agas, L. S. & Navera, T. J.