Insecticidal activity of the extract, fractions, and pure steroidal saponins of Trillium govanianum Wall. ex D. Don for the control of diamondback moth (Plutella xylostella L.) and aphid (Aphis craccivora Koch)
- PMID: 32985778
- DOI: 10.1002/ps.6107
Insecticidal activity of the extract, fractions, and pure steroidal saponins of Trillium govanianum Wall. ex D. Don for the control of diamondback moth (Plutella xylostella L.) and aphid (Aphis craccivora Koch)
Abstract
Background: Plutella xylostella L. is the major pest of crucifers globally, causing significant yield loss. Aphis craccivora Koch is the main sucking pest of legumes that transmit viral diseases, leading to economic yield reduction. To minimize loss due to pests, farmers/growers use synthetic insecticides frequently for their control, which led to insecticide resistance, detrimental to natural enemies of pest, environment, etc. Therefore, in this study, the insecticidal activity of plant extract, fractions, and pure steroidal saponins from Trillium govanianum was evaluated for their bio-efficacy against targeted pests.
Results: Parent extract was found more effective (LC50 = 1541.2 mg L-1 ) against larvae of P. xylostella after 96 h than n-butanol, n-hexane, and ethyl acetate fractions (LC50 = 3030, 3578 and 3878.1 mg L-1 , respectively). For A. craccivora, ethyl acetate fraction (LC50 = 2186.3 mg L-1 ) was most effective after 96 h than n-hexane fraction (LC50 = 2234.6 mg L-1 ), n-butanol fraction (LC50 = 2696.3 mg L-1 ) and parent extract (LC50 = 3709.1 mg L-1 ). Among pure molecules, govanoside B was found more effective (76% mortality, LC50 = 3279.5 mg L-1 ) followed by borassoside E (74%, LC50 = 3467.1 mg L-1 ) against A. craccivora after 96 h.
Conclusion: Parent extract/fractions of T. govanianum showed promising efficacy against larvae of P. xylostella and A. craccivora. Further, field study is required for its bio-efficacy against targeted pests for validation and formulation development.
Keywords: Aphis craccivora; Plutella xylostella; Trillium govanianum; efficacy; plant extracts/fractions; steroidal saponins.
© 2020 Society of Chemical Industry.
References
REFERENCES
-
- Gu X, Tian S, Wang D and Gao G, Interaction between short-term heat pretreatment and fipronil on 2nd instar larvae of diamondback moth, Plutella xylostella (Linn). Dose Response 8:331-346 (2010).
-
- Verkerk RHJ and Wright DJ, Multitrophic interactions and management of the diamondback moth a review. Bull Entomol Res 86:205-216 (1996).
-
- Zalucki MP, Shabbir A, Silva R, Adamson D, Liu SS and Furlong MJ, Estimating the economic cost of one of the world's major insect pests, Plutella xylostella (Lepidoptera: Plutellidae): just how long is a piece of string? J Econ Entomol 105:1115-1129 (2012).
-
- Talekar NS and Shelton AM, Biology, ecology and management of the diamondback moth. Annu Rev Entomol 38:275-301 (1993).
-
- Furlong MJ, Wright DJ and Dosdall LM, Diamondback moth ecology and management: problems, progress, and prospects. Annu Rev Entomol 58:517-541 (2013).
MeSH terms
Substances
LinkOut - more resources
Full Text Sources
