Abstract:
:Oryctes rhinoceros Linn. is one of the most serious pests of coconuts and other palms. Following bioassay guided method, a larvicidal compound, 22-hydroxyhopane has been isolated for the first time from methanol extract of leaves of Adiantum latifolium Lam. against the pest (LC50 value 20.81 μg/g). It is a hopanoid triterpene with molecular mass of 442.42 g/mol. The compound exhibited antibacterial activity against symbiotic gut bacteria, caused histolysis of midgut tissues and inhibited secretion of digestive enzymes such as protease, amylase and trehalase resulting in weight loss of larvae. Enzyme immunoassay showed an elevation of 20-hydroxyecdysone level in haemolymph causing disruption of metamorphosis of larvae.
journal_name
Pestic Biochem Physioljournal_title
Pesticide biochemistry and physiologyauthors
Pradeep Kumar R,Dinesh Babu KV,Evans DAdoi
10.1016/j.pestbp.2018.11.018subject
Has Abstractpub_date
2019-01-01 00:00:00pages
161-170eissn
0048-3575issn
1095-9939pii
S0048-3575(18)30312-2journal_volume
153pub_type
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