Pathogenicity of entomopathogenic fungusIsaria fumosoroseaon rugose spiralling whiteflyAleurodicus rugioperculatusand its effect on parasitoidEncarsia guadeloupae

Sumalatha, B. V.; Kandasamy, Selvaraj; Poornesha, B.; Ramanujam, B.

doi:10.1080/09583157.2020.1797632

Cited by 14 publications

(8 citation statements)

References 15 publications

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“…Therefore, in terms of the pathogenicity bioassays, the LC 50 and LT 50 values of S. lanosoniveum exhibited significant biocontrol potential in the management of RSW under laboratory conditions. The results are comparable to the effects produced by the widely studied entomopathogenic fungi like I. fumosorosea [60]. However, S. longisoniveum at 1 × 10 8 conidia/mL tested under field conditions caused 57.8% and 56.3% mortality in the egg and nymphal population of RSW on 14 DAT, which was less than that of laboratory efficacy.…”

Section: Discussionsupporting

confidence: 63%

“…In the present study, the LC 50 values and LT 50 values of S. lanosoniveum against eggs, first instar, second to third instar, and pupae of RSW were 4.72 × 10 4 , 4.94 × 10 4 , 5.11 × 10 5 , 5.92 × 10 5 conidia/mL and 4.27, 4.86, 4.56, 5.89 days, respectively. Similarly to present results, the LC 50 values of I. fumosorosea for eggs, first-second, third and fourth instar nymphs of RSW were estimated to be 2.6 ×10 4 , 2.3 × 10 4 , 3.5 × 10 5 and 9.5 × 10 5 spores /mL respectively and the LT 50 values were4.19, 3.44, 5.62 and 5.69, respectively for corresponding life stages for the concentration of 1 × 10 8 conidia/mL tested [60]. Therefore, in terms of the pathogenicity bioassays, the LC 50 and LT 50 values of S. lanosoniveum exhibited significant biocontrol potential in the management of RSW under laboratory conditions.…”

Section: Discussionmentioning

confidence: 94%

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Entomopathogenic Potential of Simplicillium lanosoniveum Native Strain in Suppressing Invasive Whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), Infesting Coconut

Sujithra

Prathibha

Rajkumar

et al. 2021

JoF

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In 2016, infestation of an exotic polyphagous pest, the rugose spiraling whitefly (RSW), Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), was documented on coconut for the first time in India. Instantaneously, RSW has garnered wide attention owing to its damage severity and rapid spread across the coconut-growing regions of the country. Hence, an attempt was made to devise a sustainable integrated pest management (IPM) module using biological control agents as a mainstay component. The present study documented the identification and characterization of a potential entomopathogenic fungal isolate for the management of RSW. An entomopathogenic fungus isolated from nymphal cadavers of RSW was identified as Simplicillium lanosoniveum based on morphological and phylogenetic analyses. A gradient of five conidial concentrations (1 × 104, 1 × 105, 1 × 106, 1 × 107 and 1 × 108 conidia/mL) of the S.lanosoniveum were tested against eggs, first instars, second to third instars and pupae of RSW. Results revealed that S.lanosoniveum is highly virulent to all developmental stages of RSW by causing mortality rates of 95.20%, 87.33%, 85.38% and 72.85%, in eggs, initial, middle and later instar nymphs of RSW, respectively, at the highest tested concentration (1 × 108 conidia/mL) at seven days after exposure. The LC50 and LT50 values of S.lanosoniveum were 4.72 × 104, 4.94 × 104, 5.11 × 105, 5.92 × 105 conidia/mL and 4.27, 4.86, 4.56, 5.89 days against eggs, initial, middle and later instar nymphs of RSW, respectively. Further, preliminary field trials with S.lanosoniveum strain at 1 × 108 conidia/mL exhibited a significant reduction in the egg and nymphal population by 57.8% and 56.3%, respectively. This report thus demonstrated that the newly isolated S.lanosoniveum is an effective pathogen at suppressing all the developmental stages of RSW. This is the first record of S.lanosoniveum infecting RSW, and it has a great potential to be developed as a mycoinsecticide.

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Section: Discussionsupporting

confidence: 63%

Section: Discussionmentioning

confidence: 94%

Entomopathogenic Potential of Simplicillium lanosoniveum Native Strain in Suppressing Invasive Whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), Infesting Coconut

Sujithra

Prathibha

Rajkumar

et al. 2021

JoF

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“…fumosorosea is a widely used and studied fungus attacking nymphs and adults of whiteflies such as Bemisia spp. (Lacey et al 2008), A. dispersus (Sanchez and Castillo, 2008), Trialeurodes vaporariorum (Boopathi et al 2013), A. rugioperculatus (Sumalatha et al 2020), P. bondari (Ali et al 2015), P. minei and A. atratus (Sumalatha et al 2020) and Singhiella simplex (Avery et al 2019).…”

Section: Discussionmentioning

confidence: 99%

“…I. fumosorosea is widely used to manage A. rugioperculatus and P. bondari infesting coconut in Florida (Ali et al 2015;Kumar et al 2018) and Singhiella simplex infesting ficus (Avery et al 2019). The blastospore formulation of I. fumosorosea (ICAR-NBAIR Pfu-5) has shown potential in managing RSW (Sumalatha et al 2020). However, some insect growth regulators, biopesticides and conventional insecticides showed effectiveness against RSW (Pradhan et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Field efficacy of Isaria fumosorosea alone and in combination with insecticides against Aleurodicus rugioperculatus on coconut

Sandeep

Kandasamy

Kalleshwaraswamy

et al. 2022

Egypt J Biol Pest Control

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Background The rugose spiraling whitefly (RSW), Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), an exotic polyphagous pest and its infestation was documented on coconut (Cocos nucifera L.) for the first time in India during 2016. RSW has attained a serious pest on many economically important crop plants due to its damage severity and rapid spread across the country in a short span of time. Hence, an attempt was made to evaluate the efficiency of the entomopathogenic fungus (EPF), Isaria fumosorosea alone as well as in combination with a reduced dose of few insecticides against RSW on coconut to devise a sustainable integrated pest management module. Thirty-two randomly selected RSW-infested coconut palms were labelled, and eight treatments with four replications were used in a randomized complete block design during the summer months (April and May) during 2021. Two sprays were performed at 15-day intervals, at a rate of 5 L/palm, and observations on infestation/palm (%), intensity (%) and mean live colonies of RSW were recorded. Results The results revealed that the combination of I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l + profenophos 50 EC @ 2 ml/l spray significantly reduced per cent infestation of RSW (82.97%), per cent intensity of RSW (80.49%) and mean RSW live colonies (79.68%) followed by combination of I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l + buprofezin 25% SC @ 1.25 ml/l spray significantly reduced per cent infestation of RSW (79.35%), intensity of RSW (74.79%) and mean RSW live colonies (74.20%) over I. fumosorosea (ICAR-NBAIR Pfu-5) @ 5 ml/l alone and untreated control. A combination of I. fumosorosea (5 ml/l) + profenophos 50 EC (2 ml/l) spray twice at an interval of 15 days was found effective in reducing the RSW population on coconut. Conclusions The present study concludes that the RSW can be controlled effectively by I. fumosorosea alone and in combination with novel insecticides at a reduced rate which showed better toxicity, ovicidal action and preserve natural enemies and reduced environmental load of chemical pesticides.

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“…America (Martin 2004), it was rst reported on coconut plantations of the Pollachi area of Tamilnadu, India in 2016 (Sundararaj and Selvaraj 2017). Further, it spread to many parts of the country, wrecking direct and indirect damages (Sumalatha et al 2020). The polyphagous species has a shorter life cycle of 37-48 days (Pradhan et al 2020), exhibiting phenotypic plasticity and high competitiveness with other native species.…”

mentioning

confidence: 99%

Invasion and escalation of Aleurodicus rugioperculatus (Hemiptera: Aleyrodidae): An alarming pest in east coast region of India

Singh

Samant

Sahoo

et al. 2021

Preprint

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Invasive species causes serious threat to the natural ecosystem. Severe and up surging phenomenon of exotic rugose spiraling whitefly (RSW), Aleurodicus rugioperculatus Martin became a major concern in global crop production. The present study aimed to document and assesses the host range, nature, and intensity of damage caused by this cryptic species. The roving survey was conducted to study the occurrence of RSW in the fruit orchards, vegetable gardens, ornamental crops, and avenues trees plantation in the east-coast region of India. Hierarchical clustering was performed based on its incidence on different host plants and correlated with the dissimilarity index. The RSW was identified based on morphological characteristics and the nature of the damage. RSW infested a total of twenty-seven crops was noticed. Four host plants viz., Cocos nucifera L., Musa sp., Psidium guajava L., and Syzygium cumini L. Skeels showed severe levels of infestation. An important implication from the current study is the occurrence of its incidence on the two new host crops viz., Amaranthus tricolor L. and Solanum torvum that was envisaged firstly to the scientific world. This study provides baseline information about RSW among various stakeholders and helps to develop a sustainable management strategy for timely mitigation of RSW menace.

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Pathogenicity of entomopathogenic fungusIsaria fumosoroseaon rugose spiralling whiteflyAleurodicus rugioperculatusand its effect on parasitoidEncarsia guadeloupae

Cited by 14 publications

References 15 publications

Entomopathogenic Potential of Simplicillium lanosoniveum Native Strain in Suppressing Invasive Whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), Infesting Coconut

Entomopathogenic Potential of Simplicillium lanosoniveum Native Strain in Suppressing Invasive Whitefly, Aleurodicus rugioperculatus Martin (Hemiptera: Aleyrodidae), Infesting Coconut

Field efficacy of Isaria fumosorosea alone and in combination with insecticides against Aleurodicus rugioperculatus on coconut

Invasion and escalation of Aleurodicus rugioperculatus (Hemiptera: Aleyrodidae): An alarming pest in east coast region of India

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