Evaluation of efficacy of 18 strains of entomopathogenic nematodes (Rhabditida) against Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) under laboratory conditions

Negrisoli, C. R. de C. B.; Júnior, Aldomário Santo Negrisoli; Botton, Marcos; Garcia, Mauro Silveira; Bernardi, Daniel

doi:10.1016/j.exppara.2013.02.002

Cited by 7 publications

(1 citation statement)

References 9 publications

(4 reference statements)

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“…The IJs can survive for long periods in the soil without feeding, while remaining in a dormant state ( Adams and Nguyen, 2002 ; Ehlers, 2001 ; Glazer, 1996 ; Womersley, 1990 ). The nematodes have a mutualistic association with Xenorhabdus and Photorhabdus bacterial species, for the Steinernematidae and Heterorhabditidae, respectively, and based on the insecticidal properties of this partnership they have been successfully exploited for biocontrol ( Holajjer et al, 2014 ; Negrisoli et al, 2013 ; Stock and Blair, 2008 ; Shapiro-Ilan et al, 2011 ). EPNs occur naturally in the soil and their survival, host range, persistence, reproductive capacity, and infectivity can be affected by soil physio-chemical properties, temperature, soil organic matter, nutrient availability, and soil moisture ( Kung et al, 1990b ; Shapiro et al, 2000 ; Stock et al, 1999 ; Sun et al, 2016 ; Yadav, 2012 ), including and not limited to storage temperature ( Ramakuwela et al, 2015 ; Strauch et al, 2000 ).…”

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Quantification of pH tolerance levels among entomopathogenic nematodes

Khathwayo¹,

Ramakuwela²,

Hatting³

et al. 2021

Journal of Nematology

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Soil pH affects the availability of nutrients, which impacts plant growth and development. Similarly, soil pH may also influence microorganisms in the soil, either beneficial or nonbeneficial. One such group of beneficial microorganisms is entomopathogenic nematodes (EPN), parasites of soil-inhabiting insects. Entomopathogenic nematodes have a number of attributes that make them good alternatives to chemical insecticides. The objective of this study was to investigate pH tolerance of 11 steinernematids and six heterorhabditids post exposure to different pH levels. Entomopathogenic nematode populations were exposed to varying pH levels (pH2 to pH11) made up from two different chemical solutions (ammonium-acetate and citrate-phosphate). Entomopathogenic nematode populations are expected to have varying tolerance to different pH levels. The highest infective juvenile survival was obtained from pH3 to pH10 in citrate-phosphate, where all populations displayed >50% survival. Steinernema carpocapsae populations had >90% survival at pH3 to pH11 in citrate-phosphate solutions. Overall, the steinernematids had a higher survival range in ammonium-acetate pH solutions compared with the heterorhabditids. Moreover, Steinernema spp., S. carpocapsae (ScCxrd, ScAll, and ScItalian) and S. riobrave showed consistently higher survival in both acidic and alkaline solutions, when compared to the other steinernematids, suggesting that they may be applied in both acidic and alkaline soils. These findings can be of use when selecting EPNs for biological control purposes in the two countries, respectively.

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mentioning

confidence: 99%

Quantification of pH tolerance levels among entomopathogenic nematodes

Khathwayo¹,

Ramakuwela²,

Hatting³

et al. 2021

Journal of Nematology

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Assessment of combined effects of some common agrochemicals and different entomopathogenic nematode species on the control of Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) under controlled conditions

Mamuk,

Yüksel,

Canhïlal

2024

Int J Trop Insect Sci

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Virulence of two entomopathogenic nematode species, Steinernema sp. (strain PQ16) and Heterorhabditis indica (strain KT3987), to nymphs of the coffee cicada Dundubia nagarasingna

Nguyen

Trinh

et al. 2019

Nematol.

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SummaryThe virulence and efficacy of two species of entomopathogenic nematodes, Steinernema sp. (strain PQ16) and Heterorhabditis indica (strain KT3987), against nymphs of the coffee cicada, Dundubia nagarasingna, was evaluated under laboratory and glasshouse conditions. The highest mortality rates of coffee cicada nymphs caused by these two nematode strains were 93.5 and 100%, respectively, at an inoculation dose of 600 infective juveniles (IJ) nymph−1. The virulence (LC50) was established as 137.5 IJ and 149.1 IJ for strains S-PQ16 and H-KT3987, respectively. The highest IJ yields of these nematode strains were 66 × 103 IJ (for S-PQ16) and 134.4 × 103 IJ (for H-KT3987) at a dose of 500 IJ nymph−1. The efficacies of the two nematode strains to coffee cicadas at treated dose of 60 × 103 IJ pot−1 were 84.4 and 88.9% after 30 days, higher than the efficacies at treated dose of 40 × 103 IJ pot−1. The number of IJ in 250 ml of soil at 10, 20 and 30 days after treatment, increased from 0.38 × 103 to 4.80 × 103 IJ in soil treated with a dose of 40 × 103 IJ and from 0.66 × 103 to 5.02 × 103 IJ in soil treated with a dose of 60 × 103 IJ (for S-PQ16). Similarly, for H-KT3987 the number of IJ increased from 0.43 × 103 to 8.99 × 103 IJ and from 0.62 × 103 to 9.64 × 103 IJ, at the respective doses. Based on results of a pot trial from glasshouse modelling, an IJ application dosage for biological control of coffee cicada nymphs in coffee plantations was proposed.

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Evaluation of efficacy of 18 strains of entomopathogenic nematodes (Rhabditida) against Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) under laboratory conditions

Cited by 7 publications

References 9 publications

Quantification of pH tolerance levels among entomopathogenic nematodes

Quantification of pH tolerance levels among entomopathogenic nematodes

Assessment of combined effects of some common agrochemicals and different entomopathogenic nematode species on the control of Planococcus citri (Risso, 1813) (Hemiptera: Pseudococcidae) under controlled conditions

Virulence of two entomopathogenic nematode species, Steinernema sp. (strain PQ16) and Heterorhabditis indica (strain KT3987), to nymphs of the coffee cicada Dundubia nagarasingna

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