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VOL. 4, ISSUE 2 (2019)
Effect of Clavigralla gibbosa ‘spiny brown bug’ infested mulberry leaf on the cocoon and post cocoon parameters of silkworm
Authors
Sanjai Kumar Gupta
Abstract
Mulberry is the main food source for the silkworm Bombyx mori L. The
spiky brown leaves that are infested with insects have a greater impact on the
output of silkworms, affecting both the quantity and quality of the larvae and
cocoons. There are several insects that may attack mulberry leaves, and while
the term often refers to aphids or weevils on legume crops, mulberry plants can
also be affected by similar sucking or boring pests. The nutritional quality of
various mulberry leaves is severely degraded when silkworms (Bombyx mori L.)
are fed mulberry leaves that are infested by sap-sucking insects such as mealy
bugs (which cause 'Tukra' disease) or Clavigralla species, which in turn
greatly hinders their growth and development. Leaf footed bugs or spiny brown
bugs, which belong to the Coreidae family, are common names. This study was
carried out using selected disease-free layings (DFLs) from commercially
popular multivoltine race hybrid silkworms. The DFLs were split into two
groups, each with one DFL per kind, and reared separately with healthy and
infested selected popular four varieties of mulberry leaves. After
installation, on the fifth day, 10 silkworm larvae were harvested by making
sure they were fully grown, and the quantity was noted. Larval parameters, such
as the number of cocoons collected, the weight of the cocoon, the weight of the
cocoon shell, the shell ratio, the total length of the filament, and the length
of the unbreakable filament, were evaluated by maintaining the larvae at a
temperature of (26±1°C, 12±1 hour, and 80±5% RH) during the stop feeding
process. The quality of silk after the cocoon phases was evaluated using the
following cocoon parameters: The statistical computation was used to determine
the variety feeding of randomly chosen Mulberry larvae, and the findings were
documented. Varietal mulberry Morus alba the percentage of loss in the number
of cocoons harvested was 41.90%, the weight of the cocoon was 35.10% gram, the
weight of the cocoon shell was 24% gram, the weight of the cocoon shell was
27.80%, the total length of the filament was reduced by 26.40%, the length of
the unbreakable filament was 40.80%, and the denier reeducation loss was 50%
when compared to healthy and infested mulberry leaf feeding.
Pages:67-72
How to cite this article:
Sanjai Kumar Gupta "Effect of <i>Clavigralla gibbosa </i>‘spiny brown bug’ infested mulberry leaf on the cocoon and post cocoon parameters of silkworm". International Journal of Biology Research, Vol 4, Issue 2, 2019, Pages 67-72
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