An assessment of ecofriendly insecticidal toxicity of Ocimum sanctum, Croton tiglium and Zingiber officinale extractives against Bihar hairy caterpillar, Spilarctia obliqua Walker (Lepidoptera: Arctiidae)
Author(s): Shail Bajpai and BS Chandel
Abstract: The Bihar hairy caterpillar,
Diacrisia (
Spilarctia)
obliqua Walker are sporadic in nature has been in regular occurrence in northern Indo-Gangatic reigion, causing considerable damage to cruciferous crops and vegetables in our country. An experiment was conducted to test the insecticidal efficacy of six naturally occurring plant extracts against third instar larvae of
Diacrisia (
Spilarctia)
obliqua Walker under the laboratory conditions. The bio-efficacy of six plant materials
viz.,
Croton tiglium Linn.,
Datura alba Linn,
Ocimum santum Linn,
Spilanthes acmella Murr,
Thavetia nerfolia Linn. and
Zingiber officinale Linn. were prepared with the help of the soxhlet apparatus under the laboratory conditions and one untreated control
used for detail study. The laboratory trial was done in three glass petridishes (10cm diameter and replicated thrice by using each selected extracts per petridish. To record the mortality of ten larvae of
Spilarctia obliqua were released inside each pair of petridishes and allow them to remain for 24 hours. These petridishes were kept as such under control conditions and mortality count was taken after 6, 12, 24 hours of exposure. The result observed that
O. santum registered highest mortality (65.61%) to the 3
rd instars larvae of
Spilarctia obliqua Walk. when compared to other plant extracts as;
C. tiglium (57.39) >
Z. officinale (55.84) >
S. Acmella (51.70) >
T. Nerfolia (51.56) >
D. Alba (37.93), respectively. The aforesaid results have focused on natural plant products as alternatives for insect-pest control.
DOI: 10.33545/27068919.2020.v2.i3b.134Pages: 98-103 | Views: 993 | Downloads: 365Download Full Article: Click HereHow to cite this article:
Shail Bajpai, BS Chandel.
An assessment of ecofriendly insecticidal toxicity of Ocimum sanctum, Croton tiglium and Zingiber officinale extractives against Bihar hairy caterpillar, Spilarctia obliqua Walker (Lepidoptera: Arctiidae). Int J Adv Acad Stud 2020;2(3):98-103. DOI:
10.33545/27068919.2020.v2.i3b.134
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