Entomopathogenicity ofbeauveria bassianaandmetarhizium anisopliaeto the cowpea aphid,aphis craccivorakoch (homoptera: Aphididae)

Ekesi, Sunday; Akpa, A. D.; Onu, I.; Ogunlana, Michael O.

doi:10.1080/03235400009383341

Cited by 17 publications

(12 citation statements)

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“…Another study was conducted on Aphis craccivora (Koch) individuals; 77.50 to 100% mortality rates were reported in application of B. bassiana, M. anisopliae, V. lecanii, Hirsutella thompsonii, and Cladosporium oxysporum isolates at the concentration of 10 8 conidia ml −1 (Saranya et al 2010). According to Ekesi et al (2000), mortality rates at the 4 different concentrations of B. bassiana CPD 11, and M. anisopliae CPD 4 and 5 isolates were recorded as 58-91, 64-93, and 66-100%, respectively. In a study with other aphids and as a result of the application of C. oxysporum isolate at 10 8 conidia ml −1 concentration against Aphis fabae individuals, the mortality rate was 67.90% (Bensaci et al 2015).…”

Section: Resultsmentioning

confidence: 99%

Effects of some entomopathogenic fungi on the aphid species, Aphis gossypii Glover (Hemiptera: Aphididae)

Erol

Abdelaziz

Birgücü

et al. 2020

Egypt J Biol Pest Control

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Background Effects of the entomopathogenic fungi Beauveria bassiana, Verticillium alfalfae, and Trichoderma viride; secondary metabolites of MS1 (B. bassiana) and MS2 (V. alfalfae); and Dimethoate active substances on the aphid species, Aphis gossypii Glover (Hemiptera: Aphididae), were tested. Main body of the abstract Fungus isolates were prepared as 107 conidia ml−1 of spore suspensions and applied on the 2nd instar nymphs of A. gossypii. After the applications, evaluations were made on the 1st, 3rd, 5th, and 7th days by counting the live individuals. Obtained data were 100 and 93% mortality rate at MS1 (B. bassiana) and MS2 (V. alfalfae), and secondary metabolites were recorded in the 3rd day count results. On the 5th day counts, the highest mortality rates after secondary metabolites were statistically at the same group with B. bassiana, T. viride, and dimethoate. On the 7th day, counting results of all experiment groups were analyzed statistically and were found effective. Short conclusion Obtained results showed that the fungal secondary metabolites might be useful when utilized as a biocontrol agent against the aphids.

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Section: Resultsmentioning

confidence: 99%

Effects of some entomopathogenic fungi on the aphid species, Aphis gossypii Glover (Hemiptera: Aphididae)

Erol

Abdelaziz

Birgücü

et al. 2020

Egypt J Biol Pest Control

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“…Additionally, distribution of infective spores has been shown to be influenced by formulation; for example, conidia formulated in oil are usually evenly distributed on the insect cuticle and leaf surface while aqueous spore formulations remain as drops on the surface after application and thereby enhancing the efficacy of EPF-based biopesticides (Inglis, Ivie, Duke, & Goettel, 2000;Inyang et al, 2000;Wraight, Filotas, & Sanderson, 2016). Previous studies have reported pathogenicity of M. anosopliae isolates against A. craccivora under laboratory studies (Ekesi, Akpa, Onu, & Ogunlana, 2000;Mweke et al, 2018;Sahayaraj & Borgio, 2010;Saranya, Ushakumari, Jacob, & Philip, 2010). However, these isolates were not evaluated under field conditions neither of them was commercialized for control of A. craccivora.…”

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confidence: 99%

Efficacy of aqueous and oil formulations of a specific Metarhizium anisopliae isolate against Aphis craccivora Koch, 1854 (Hemiptera: Aphididae) under field conditions

Mweke

Akutse

Ulrichs

et al. 2019

J Applied Entomology

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Cowpea (Vigna unguiculata) production is constrained by biotic and abiotic factors, among which Cowpea aphid (Aphis craccivora) is ranked a key insect pest that severely limits its potential for provision of food and nutritional security to millions of people in sub‐Saharan Africa. The use of entomopathogenic fungi for A. craccivora management has been recently demonstrated at laboratory and field levels as alternative to synthetic insecticides, but with low adoption in Africa. This study assessed the efficacy of aqueous and oil formulations of Metarhizium anisopliae ICIPE 62 against A. craccivora under field conditions. Metarhizium anisopliae formulations and a commonly used insecticide Duduthrin® were applied using knapsack sprayers with target output of 350 L/ha. Data on aphid infestation levels were collected weekly. ICIPE 62 efficacy in inducing mortality was also assessed 24 hr post‐treatment coupled with mycosis test. Further, leaf and grain yields were determined. After six weeks post‐treatment in the wet season, there was no significant reduction in aphid density in fungus‐treated plots compared to control and Duduthrin®‐treated plots. However, in the dry season six weeks after applying the treatments, oil formulation spray resulted low aphid density compared to control and Duduthrin®‐treated plots. ICIPE 62 formulations did not negatively affect the natural enemies’ population. Leaf yield from the various treatments did not differ significantly in the wet season, but the two fungal formulations recorded higher yields in dry season compared to other treatments. Grain yields in wet and dry seasons were lower in control and Duduthrin®‐treated plots compared to both ICIPE 62 formulations. This study showed that both M. anisopliae ICIPE 62 formulations are effective in suppressing A. craccivora population under field conditions without adverse effects on its beneficial insects. The study also revealed that efficacy of fungal‐based biopesticides is highly dependent on environmental conditions.

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“…Ekesi et al (2000) reported similar results, detecting 91 and 93% mortality of Aphis craccivora C.L.Koch, in the seventh day after the spraying Loureiro and Moino (2006). reported that 1 × 10 6 , 1 × 10 7 and 1 × 10 8 conidia/mL treatments testing B. bassiana and M. anisopliae non-commercial strains resulted in 100% mortality of third instars of A. gossypii and M. persicae.…”

mentioning

confidence: 53%

Entomopathogenic Fungi Tested in Planta on Pepper and in Field on Sorghum, to Control Commercially Important Species of Aphids

Ek-Ramos

Mantzoukas

Tamez‐Guerra

et al. 2021

Preprint

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Given the aphids high reproductive capacity, assessing their biocontrol by using entomopathogenic fungi is crucial; to determine their potential, fungi were tested in planta and in field conditions. Significant decrease of Myzus persicae (Sulzer) population was observed in planta after applying Beauveria bassiana (strain 7R), Trichoderma gamsii (strain Z) or Metarhizium brunneum (strain Meta Br1) at 1 × 107 or 1 × 108 conidia/mL on pepper plants. Significant differences of aphids’ populations were detected between fungus concentration and control (F = 68.743, df = 6.980, P <0.001), where M. brunneum at 1 × 108 conidia/mL reduced aphids population close to zero. At 20 °C, dead aphids’ mycosis by B. bassiana and T. gamsii was 78% and 84%; at 25 °C was 83% and 88%; and at 30 °C was 75% and 79%, respectively. Mexican PTG4 and commercial GHA B. bassiana strains were tested in field (treating seeds with 1 × 106 conidia/mL) against the Melanaphis sacchari (Zehntner) aphid populations, on naturally infested sorghum plants. Results showed that plant germination and emergence were not affected, whereas yield (grams of sugar/plant) was significantly higher among treated compared with untreated plants. The aphid population decreased in plants from PTG4 treated seeds; indeed, this treatment had a significant positive effect on the flowering index, whereas the stem fresh weight and juice volume was significantly increased among plants from GHA treated seeds. Taken together, tested strains can be used as a tool to control aphids’ population on several crops such as pepper and even increase the yield in sorghum.

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Entomopathogenicity ofbeauveria bassianaandmetarhizium anisopliaeto the cowpea aphid,aphis craccivorakoch (homoptera: Aphididae)

Cited by 17 publications

References 12 publications

Effects of some entomopathogenic fungi on the aphid species, Aphis gossypii Glover (Hemiptera: Aphididae)

Effects of some entomopathogenic fungi on the aphid species, Aphis gossypii Glover (Hemiptera: Aphididae)

Efficacy of aqueous and oil formulations of a specific Metarhizium anisopliae isolate against Aphis craccivora Koch, 1854 (Hemiptera: Aphididae) under field conditions

Entomopathogenic Fungi Tested in Planta on Pepper and in Field on Sorghum, to Control Commercially Important Species of Aphids

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