Conidia production by<i>Isaria fumosorosea</i>on solid substrates and its pathogenicity towards<i>Bemisia tabaci</i>

Murillo-Alonso, Karla Tatiana; Peña-Chora, Guadalupe; Baltazar, Efrén Hernández; Hernández-Velázquez, Víctor Manuel

doi:10.1080/09583157.2014.966649

Biocontrol Science and Technology

2014

DOI: 10.1080/09583157.2014.966649

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Conidia production byIsaria fumosoroseaon solid substrates and its pathogenicity towardsBemisia tabaci

Karla Tatiana Murillo-Alonso

Guadalupe Peña-Chora

Efrén Hernández Baltazar

et al.

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Cited by 9 publications

(1 citation statement)

References 21 publications

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“…However, tomato production is also signifi cantly affected by whitefl ies Bemisia tabaci (Hemiptera: Aleyrodidae). For the control of these insect pests there are many studies reporting promising results following the use of entomopathogenic fungi (Faria & Wraight, 2001;Vicentini et al, 2001;Ramos et al, 2004;Potrich et al, 2011;Murillo-Alonso et al, 2015;Oreste et al, 2016).…”

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Is Isaria fumosorosea selective to Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)?

Potrich¹,

Libardoni²,

Alves³

et al. 2020

Eur. J. Entomol.

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Entomopathogenic fungi and the egg parasitoid Trichogramma pretiosum Riley (Hymenoptera: Trichogrammatidae) might be used together in biological control. However, the effects of these fungi on T. pretiosum are not known. Thus, this study aimed to determine the effect of the entomopathogenic fungus Isaria fumosorosea, on the biological parameters of T. pretiosum. Two isolates of I. fumosorosea (IBCB 367 and IBCB 394) were used for this purpose. (1) In a free choice test: cards (1.0 × 5.0 cm) with non-parasitized eggs of Anagasta kuehniella Zeller (Lepidoptera: Pyralidae) were either sprayed with 0.2 mL of the fungus suspension (1.0 × 10 9 conidia.mL-1) or with sterile distilled water containing Tween ® 80 (0.01%), which were then offered to females of T. pretiosum. (2) No choice test: the isolates were sprayed at a concentration of 1.0 × 10 9 conidia.mL-1 on cards (1.0 × 5.0 cm) with A. kuehniella eggs. The control consisted of spraying sterile distilled water containing Tween ® 80 (0.01%). Individual females of T. pretiosum were confi ned for 24 h with the cards. The number of eggs parasitized, percentage of emergence, longevity, duration of the egg-adult period and sex ratio were evaluated, as well as the longevity of the females that parasitized the eggs and the mortality of the emerging adults evaluated. IBCB 367 isolate repelled T. pretiosum. The pre-parasitism and post-parasitism sprays did not affect the number of eggs parasitized or the sex ratio, however, the pre-parasitism IBCB 394 treatment the females and males survived for longer, whereas the survival of females in post-parasitism treatment with the same isolate was reduced. The presence of conidia on and mycelium of the fungus in T. pretiosum was confi rmed using Scanning Electron Microscopy and a histological analysis. Isolates IBCB 367 and IBCB 394 from I. fumosorosea are selective to T. pretiosum in the laboratory.

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confidence: 99%

Is Isaria fumosorosea selective to Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)?

Potrich¹,

Libardoni²,

Alves³

et al. 2020

Eur. J. Entomol.

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Comparison between superficial and solid-state cultures of Isaria fumosorosea: conidial yields, quality and sensitivity to oxidant conditions

Muñiz-Paredes

Garza-López

Viniegra‐González

et al. 2016

World J Microbiol Biotechnol

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Conidia production and quality from mycoinsecticides in solid-state cultures (SSC) are frequently inferred from superficial culture (SC) results. Both parameters were evaluated for two Isaria fumosorosea strains (ARSEF 3302 and CNRCB1), in SC and SSC, using culture media with the same chemical composition. For both strains, conidia production was higher in SC than SSC in terms of conidia per gram of dry substrate. Germination in both strains did not show significant differences between SC and SSC (>90 %). Similarly, conidia viability in ARSEF 3302 strain did not show differences at early stages between SC and SSC, but was higher in SC compared to SSC in the late stage of culture; in contrast, conidia from CNRCB1 strain did not differ between both culture systems. Some infectivity parameters improved in conidia from SSC, compared to SC at the early stages, but these differences disappeared at the final stage, independently of the strain. Both strains showed decreased conidia production when 26 % O2 pulses were applied; nevertheless, conidiation in SSC was two orders of magnitude more sensitive to oxidant pulses. In SC with 26 % O2 pulses, conidia viability for both strains at early stages, was higher than in normal atmospheric conditions. Infectivity towards Galleria mellonella larvae was similar between conidia from normal atmosphere and oxidant conditions; notably, for the strain ARSEF 3302 infectivity decreased at the final stage. This study shows the intrinsic differences between SC and SSC, which should be considered when using SC as a model to design production processes in SSC.

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Metarhizium and Isaria as biological control agents against Meccus vector of Chagas disease

Toriello

Brunner-Mendoza²,

Navarro-Barranco³

et al. 2022

Int J Trop Insect Sci

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Conidia production byIsaria fumosoroseaon solid substrates and its pathogenicity towardsBemisia tabaci

Cited by 9 publications

References 21 publications

Is Isaria fumosorosea selective to Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)?

Is Isaria fumosorosea selective to Trichogramma pretiosum (Hymenoptera: Trichogrammatidae)?

Comparison between superficial and solid-state cultures of Isaria fumosorosea: conidial yields, quality and sensitivity to oxidant conditions

Metarhizium and Isaria as biological control agents against Meccus vector of Chagas disease

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