Patogenicidade de isolados de fungos entomopatogênicos à Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae)

Thomazoni, Dhyego; Formentini, Marina Andressa; Alves, Luís Francisco Angeli

doi:10.1590/1808-1657001162012

Cited by 11 publications

(8 citation statements)

References 12 publications

(10 reference statements)

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“…In its native habitat, FAW is attacked by several natural enemies including parasitoids and entomopathogenic fungi [ 22 , 23 , 24 , 25 ] which target different development stages [ 21 , 26 , 27 , 28 ] causing significant mortality on its population [ 29 , 30 , 31 ]. Around 17 different parasitoid species of FAW are known in its native range [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

First Report of Native Parasitoids of Fall Armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in Mozambique

Caniço

Mexia

Santos

2020

Insects

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The alien invasive insect pest Spodoptera frugiperda Smith (Lepidoptera: Noctuidae), commonly referred to as fall armyworm (FAW), is causing significant losses to maize production in Africa since its detection in 2016. As an emergency response, governments in several countries distributed and/or promoted massive use of synthetic insecticides among smallholder farmers to fight FAW. The inappropriate use of synthetic insecticides by non-trained and ill-equipped farmers raises environmental and health concerns. This study aimed to assess the occurrence of native parasitoids of FAW, their parasitism rates, and relative abundance in the central province of Manica, Mozambique. A field collection of FAW egg masses and larvae was conducted from May to August 2019 (dry season of the 2018/2019 cropping season) and in December 2019 and January 2020 (rainy season of 2019/2020 cropping season). A total of 101 egg masses and 1444 larvae of FAW were collected from infested fields. Five larval parasitoids were recorded, but no egg parasitism was observed. Coccygidium luteum Brullé (Hymenoptera: Braconidae) and Drino quadrizonula Thomson (Diptera: Tachinidae) were the primary parasitoids. Maximum parasitism of 23.68% and 8.86% and relative abundance of 100 and 96.3 were recorded for C. luteum and D. quadrizonula, respectively. Total parasitism by different parasitoid species was at 9.49%. Cultural practices favoring the action of these parasitoids should be advocated.

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Section: Introductionmentioning

confidence: 99%

First Report of Native Parasitoids of Fall Armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in Mozambique

Caniço

Mexia

Santos

2020

Insects

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“…strains caused 100% mortality of second‐instar FAW larvae soaked in aqueous conidial suspensions. Thomazoni et al . documented that not one of 49 Beauveria bassiana (Bals.)…”

Section: Introductionmentioning

confidence: 99%

“…strains caused 100% mortality of second-instar FAW larvae soaked in aqueous conidial suspensions. Thomazoni et al 14 documented that not one of 49 Beauveria bassiana (Bals.) Vuillemin strains caused mortality >44.9% on third-instar larvae immersed in conidial suspensions for 10 s, and García et al 15 found that only three of 97 strains, belonging to three species, provided relevant infectivity (69-97%) on neonate FAW larvae.…”

Section: Introductionmentioning

confidence: 99%

“…This leads to multiple applications or high dosages which reduce populations of this pest, but also affect beneficial insects, pollute agricultural soils and water, and pose health risks for farm workers and consumers . FAW larvae are also difficult to control with entomopathogenic fungi, as suggested by a number of laboratory studies that highlight the scarcity of entomopathogenic fungal strains that are capable of causing significant mortality of this pest, even at doses as high as 1 × 10 9 mL ‐1 . Carneiro et al .…”

Section: Introductionmentioning

confidence: 99%

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Interaction of Beauveria bassiana and Metarhizium anisopliae with chlorpyrifos ethyl and spinosad in Spodoptera frugiperda larvae

Rivero-Borja

Guzmán‐Franco

Rodríguez‐Leyva

et al. 2018

Pest Management Science

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The synergistic mortality and improved fungal performance observed here support the hypothesis that combinations of low insecticide doses and entomopathogenic fungi can enhance integrated pest management programs and reduce the environmental impact of insecticides. Antagonism shows that some particular combinations and application sequences may produce disadvantages in pest control. © 2018 Society of Chemical Industry.

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“…Thus these applications are not always efficient and can cause several problems to human and the environment. The damage magnitude caused by S. frugiperda has induced the development of alternative methods such as the use of biological control (Thomazoni et al, 2014), resistant plants (Toscano et al, 2016), plants with insecticidal action (Almeida et al, 2017) and resistance elicitors (War et al, 2015). The induction of resistance is a viable alternative, being a management practice that can be done with applications of abiotic inducers.…”

Section: Introductionmentioning

confidence: 99%

Effect of resistance elicitors on the biology and feeding preference of Spodoptera frugiperda (J.E.Smith) (Lepidoptera: Noctuidae) in corn

Mondego¹,

Machado²,

Oliveira³

et al. 2018

Aust J Crop Sci

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This study searches for efficient and low environmental impact alternatives to control Spodoptera frugiperda. Application of elicitors capable of inducing resistance in plants has already been highlighted. The elicitors trigger the plant's defense capacity against attack of herbivores and phytopathogenic organisms. Thus, the present study aimed to evaluate the effect of resistance elicitors on some biological aspects and food preference of Spodoptera frugiperda (J. E. Smith) in corn in laboratory conditions. The treatments consisted of: Control (distilled water); Biofertilizer (25 mL L-1); Acibenzolar-S-methyl-ASM (2 mg mL-1); Potassium silicate (10 mL L-1) and T5: Potassium silicate (10 mL L-1) + ASM (2 mg mL-1). The treatments were foliar application of elicitors with adjustable jet pressure sprayer to the whole plant with an amount of 20 mL of the solution per plant. The larval phase (weight at 7 and 14 days, duration and viability); pupal phase (weight after 24 h, duration and viability) and adult phase (number of eggs / female, number of eggs/posture/female and longevity of adults) were evaluated. Free-choice and no-choice food preference test experiments were also carried out on 1st and 3rd instar caterpillars, after which the leaves collected at 5 and 10 days after spraying. The results showed that Acibenzolar-S-methyl induces resistance in corn plants when applied either alone or together with potassium silicate. Therefore, it adversely affects development of S. frugiperda. The leaves treated with Potassium Silicate + ASM were less preferred and consumed by 1st and 3rd instar caterpillars in free-choice food preference test.

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Patogenicidade de isolados de fungos entomopatogênicos à Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae)

Cited by 11 publications

References 12 publications

First Report of Native Parasitoids of Fall Armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in Mozambique

First Report of Native Parasitoids of Fall Armyworm Spodoptera frugiperda Smith (Lepidoptera: Noctuidae) in Mozambique

Interaction of Beauveria bassiana and Metarhizium anisopliae with chlorpyrifos ethyl and spinosad in Spodoptera frugiperda larvae

Effect of resistance elicitors on the biology and feeding preference of Spodoptera frugiperda (J.E.Smith) (Lepidoptera: Noctuidae) in corn

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