Potentiating Effects of Neem on Nucleopolyhedrovirus Treatment of Spodoptera litura Fab.

Murugan, Kadarkarai; Sivaramakrishnan, S.; Kumar, Nikhil; Jeyabalan, D.; Senthil-Nathan, Sengottayan

doi:10.1017/s1742758400019524

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…Lingappa et al (2000) also reported that Econeem (a neem-based formulation) in combination with HaNPV reduced damage by 70.36% to 71.99% and led to maximum cotton yield. Murugan et al (1999), however, observed that combining neem products with S. litura NPV resulted in threefold enhancement of percent mortality even at reduced concentrations. In the present study with different botanicals, neem seed kernel extracts with different solvents were found to be superior to other botanicals, viz., E. adenophorum and A. brevifolia, because neem inflicts multiple stresses at the same time on the insect, signifying a greater reduction in LC 50 values of PbGV.…”

Section: Discussionmentioning

confidence: 92%

Effect of botanical extracts on the biological activity of granulosis virus against Pieris brassicae

et al. 2009

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A granulosis virus strain infecting Pieris brassicae (PbGV) was isolated from the dry temperate region of northwestern Himalayas as a potential microbial agent for its management. The effect of different botanicals (having insecticidal action against P. brassicae) on the bioefficacy of PbGV was evaluated under laboratory conditions using leaf disc bioassays on cabbage for improving the insecticidal performance of the PbGV. The synergistic action of different botanical extracts was evident in terms of reduction in LC 50 values against different botanical extracts. Among different extracts, petroleum-ether extract of neem seed kernel (NSK) when combined with PbGV resulted in maximum reduction of LC 50 value (4.39×10 2 occlusion bodies [OBs] ml −1 ) followed by methanolic extract (7.38×10 2 OBs ml −1 ) and aqueous extract (9.36×10 3 OBs ml −1 ) as compared with PbGV alone (1.85×10 4 OBs ml −1 ) for 2nd instar larvae of the test insect. These trends were found analogous in cases of 3rd and 4th instars of P. brassicae with different solvent extracts of NSK. The other botanicals evaluated, viz., Eupatorium and Artemesia, also resulted in reduction of LC 50 values for 2nd, 3rd and 4th instars as compared with PbGV alone when different extracts were combined with virus for bioassays. The studies suggest that the PbGV in combination with botanical pesticides could be more useful as a bio-pesticide against cabbage butterfly (P. brassicae) in IPM programs.

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Section: Discussionmentioning

confidence: 92%

Effect of botanical extracts on the biological activity of granulosis virus against Pieris brassicae

et al. 2009

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“…These plant-based compounds include insecticides, ovicides, antifeedents and attractants, among other qualities. (Muruganm et al, 1998) [12] . Majority of insects have particular semiochemicals.…”

Section: Discussionmentioning

confidence: 99%

Bioefficacy of Nerium oleander leaf extract on the growth of Heliothis armigera H. (Lepidoptera: Noctuidae)

Sharma,

Jawalkar,

Patil

et al. 2023

J. Entomol. Zool. Stud.

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The current study evaluated the effect of various solvents extract from Nerium oleander leaves on developing stages in Heliothis armigera. To study the reproductive aspects of Heliothis armigera, leaf extract of Nerium oleander was prepared in chloroform and methanol solvents. After 24 and 96 hours of treatment, both chloroform and methanol extract were interrupt their life cycle and the notable changes had been observed such as increased mortality and emergence of adults were decreased.

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“…Antifeedant and toxic properties of several plant extracts against different insects have been assessed by various workers -I. carnea against Achaea janata (Arivudainambi and Nachiappan 1993); Nicotiana tabacum and Datura metal against S. litura (Murugan et al, 1998); D. stromonium against Manduca sexta (Katanyukul and Thurston, 1979); Eucalyptus spp. against Plutella xylostella (Dwivedi and Mathur, 1999) and against Plecoptera reflexa (Meshram, 2000).…”

Section: Discussionmentioning

confidence: 99%

Comparative Efficacy of Plant Extracts Alone and in Combination With Bacillus Thuringiensis Sub Sp. Kurstaki Against Spodoptera Litura Fab. Larvae

Rajguru

2011

JBiopest

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Efficacy of crude aqueous extracts of eight plant species was assessed against Spodoptera litura larvae at 25, 50, 75 and 100 % concentrations alone and in combination with Bacillus thuringiensis sub sp. kurstaki Berliner (Btk) under controlled laboratory conditions. Leaf extracts of Acacia arabica and Annona squamosa were found most promising causing 76.66 % and 83.33 % larval mortality respectively at 25 % concentration within 3 days of treatment. Leaf extract of Datura stramonium inflicted 93.33 % larval mortality at 50 % concentration within 4 days. When used in combination with Btk, increased larval mortality could be observed vis-à-vis plant extracts alone in cases of seed extracts of A. arabica, A. squamosa and D. stramonium and leaf extract of Pongamia pinnata only on 3 days of treatment and onwards indicating synergistic effect. However, leaf extracts of A. arabica, A. squamosa,D.stramonium, Eucalyptus globulus, Ipomoea carnea, Lantana camara and Nicotiana tabacum had antagonistic effect when used in combination with Btk.

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Potentiating Effects of Neem on Nucleopolyhedrovirus Treatment of Spodoptera litura Fab.

Cited by 8 publications

References 17 publications

Effect of botanical extracts on the biological activity of granulosis virus against Pieris brassicae

Effect of botanical extracts on the biological activity of granulosis virus against Pieris brassicae

Bioefficacy of Nerium oleander leaf extract on the growth of Heliothis armigera H. (Lepidoptera: Noctuidae)

Comparative Efficacy of Plant Extracts Alone and in Combination With Bacillus Thuringiensis Sub Sp. Kurstaki Against Spodoptera Litura Fab. Larvae

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