Effect of adjuvants on <i>Lecanicillium lecanii</i> against nymphs of <i>Lipaphis erysimi</i> (Kalt)

Ritika, .; Joshi, N.V.; Sangha, K. S.

doi:10.5958/0974-8172.2019.00125.1

Cited by 4 publications

(4 citation statements)

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“…One ml of this formulated suspension was then added to 100 ml Sabouraud maltose broth (SMB) and incubated at 25± 2°C for 10 days following the methodology of Patil and Jadhav (2016). The surface area coverage was recorded according to Ritika et al (2019) on 7 th day after inoculation (DAI) and the fungal biomass was recorded 10 days after inoculation. There were ten treatments with three replicates each.…”

Section: Methodsmentioning

confidence: 99%

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Evaluation of adjuvants on growth and virulence of Metarhizium rileyi against Spodoptera litura (F.)

Grewal¹,

Joshi

2022

ije

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This study evaluated the effect of adjuvants viz. glycerol, boric acid, carboxy methyl cellulose (CMC) and Tween-80 on the growth of Metarhizium rileyi (Farlow) Kepler, Rehner and Humber isolates. Their virulence against Spodoptera litura (F.) larvae has also been assessed. The isolates were observed to exhibit maximum surface area coverage and biomass with glycerol @ 5% and CMC @ 0.5%. Further, NIPHM isolate of M. rileyi supplemented with mixture of adjuvants- glycerol @ 5% and CMC @ 0.5% when evaluated against S. litura larvae gave maximum mortality (63.33%) and increase over control (without adjuvants- 2.69%). This study demonstrates the possible role of adjuvants in enhancing the growth of M. rileyi and its virulence against S. litura.

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Section: Methodsmentioning

confidence: 99%

“…The application of adjuvants can provide protection and stimulate the establishment of antagonist on the host surface (Guijarro et al, 2018). There is a need for basic research on the standardization of suitable adjuvants for the development of myco-formulations (Ritika et al, 2019). Metarhizium rileyi has a lot of potential as a promising entomopathogen.…”

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Evaluation of adjuvants on growth and virulence of Metarhizium rileyi against Spodoptera litura (F.)

Grewal¹,

Joshi

2022

ije

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“…These additives act as the UV protectant for conidia (Fernandes et al 2015;Wu et al 2020), allowing e conidia for longer survivability (Kaiser et al 2018). Several surfactants have been investigated for use along with L. lecanii bio-pesticides, such as glycerol, tween-20, tween-80, carboxy methyl cellulose, chitin-enriched groundnut oil, and several other surfactants (Nithya and Rani 2019;Ritika et al 2019). None of the available studies examined the potential surfactant with active alkylaryl polyglycol ether or alkyl glycerol phthalate for supporting the L. lecanii bio-pesticide efficacy.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of bio-pesticide Lecanicillium lecanii against soybean-sucking bugs Riptortus linearis during field application

MULYATI,

ZUBAIDAH,

PRAYOGO

2023

Biodiversitas

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Abstract. Mulyati Y, Zubaidah S, Prayogo Y. 2023. Efficacy of bio-pesticide Lecanicillium lecanii against soybean-sucking bugs Riptortus linearis during field application. Biodiversitas 24: 4829-4836. This study aimed to determine the effect of application time and surfactants on the efficacy of Lecanicillium lecanii strain Probolinggo in controlling the soybean pod-sucking bug Riptortus linearis in a field test. The study was conducted in a randomized block design consisting of two treatments, namely time of application (7 am, 10 am, 1 pm, and 4 pm) and type of surfactant (alkyl glycerol phthalate and alkylaryl polyglycol ether). Application time at 4 pm showed 93% highest mortality of R. linearis than the other treatments, with the lowest number of punctures (86 punctures) and the highest soybean dry weight (11.38 g), which were not significantly different from the application time of 10 am. The efficacy of L. lecanii increased by 74.3% after adding alkylaryl polyglycol ether. The efficacy of L. lecanii with alkyl glycerol phthalate was not significantly different from the control. In the parameters of the number of seed punctures and dry weight of soybeans, the surfactant treatment gave similar results to the control. The results showed that in the field test, the highest efficacy of L. lecanii against R. linearis occurred at 4 pm with alkil aril polyglycol ether surfactant.

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“…L. lecanii commences infection via conidia attachment to insect's epicuticle by hydrophobic and electrostatic interactions followed by development of an infected structure. The germinating conidia break insect's cuticle via mechanical and enzymatic degradation and subsequently fungi grows in insect haemolymph by utilizing its nutrients and in turn produces toxins and ultimately kills insect (Anderson et al, 2011;Ritika et al, 2019;Singh and Joshi, 2020). Hydrolyzing enzymes such as chitinase, lipase and protease are major determinant of EPF virulence against target pest.…”

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Chitinase Enzyme Activity and Pathogenicity of Lecanicillium lecanii Against Mustard Aphid Lipaphis erysimi (Kalt.)

Ritika

Joshi

Sharma

2021

ije

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Lecanicillium lecanii (Zimmerman) Zare and Gams is an entomopathogenic fungi used as an alternative biocontrol agent against crop pests. Lipaphis erysimi (Kalt.) is an important pest of Brassica family. The present study evaluates the efficacy of three Lecanicillium lecanii isolates against the nymphs of Lipaphis erysimi (Kalt.). Bioassay revealed nymphal mortality as 66.68, 62.23 and 42.50 % of L. lecanii NIPHM, L. lecanii MTCC 956 and L. lecanii MTCC 2056, respectively at maximum concentration (@12 g/ l). Extracellular enzyme activity of fungal isolates when evaluated revealed variation in the level of enzyme secretion. The maximum chitinase and n-acetyl-β-D-hexosaminidase activity (0.48 and 0.41 U/ ml) were observed in L. lecanii NIPHM on 6th day of incubation.

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Effect of adjuvants on Lecanicillium lecanii against nymphs of Lipaphis erysimi (Kalt)

Cited by 4 publications

References 0 publications

Evaluation of adjuvants on growth and virulence of Metarhizium rileyi against Spodoptera litura (F.)

Evaluation of adjuvants on growth and virulence of Metarhizium rileyi against Spodoptera litura (F.)

Efficacy of bio-pesticide Lecanicillium lecanii against soybean-sucking bugs Riptortus linearis during field application

Chitinase Enzyme Activity and Pathogenicity of Lecanicillium lecanii Against Mustard Aphid Lipaphis erysimi (Kalt.)

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