Field Efficacy of Entomopathogenic Fungi against Brinjal and Chilli Aphid (<i>Aphis gossypii</i> Glover) (Homoptera: Aphididae)

Ramanujam, B.; Japur, Krishna; Poornesha, B.

doi:10.5958/2249-524x.2018.00026.2

Cited by 5 publications

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“…Cabbage aphid ( Brevicoryne brassicae ) density was reduced by 76–78% in plots treated with preparations of three fungal isolates compared to the high incidence of 107.5 aphids per plant in untreated plots 29 . Similar efficacies were also observed on brinjal and chili treated with the fungal preparations against cotton aphids ( Aphis gossypii ) 30 . Three other fungal preparations suppressed safflower aphid ( Uroleucon compositae ) population by 64–73% after the first spray and 74–85% after the second spray in three consecutive years 31 .…”

Section: Introductionmentioning

confidence: 62%

“…29 Similar efficacies were also observed on brinjal and chili treated with the fungal preparations against cotton aphids (Aphis gossypii). 30 Three other fungal preparations suppressed safflower aphid (Uroleucon compositae) population by 64-73% after the first spray and 74-85% after the second spray in three consecutive years. 31 In contrast, relatively low efficacies (33-50%) of three fungal preparations against cabbage aphids were observed in 2 year field trials.…”

Section: Introductionmentioning

confidence: 99%

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Emulsifiable oil‐formulated Beauveria bassiana competes with imidacloprid for seasonal control of cereal aphids in Zhejiang, China

Qi,

Shao,

Yang

et al. 2024

Pest Management Science

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BACKGROUNDAlternatives to neonicotinoids against cereal aphids are needed to mitigate aphid resistance and non‐target effects. The emulsifiable oil formulations of two Beauveria bassiana strains, namely Bb registered as a mycoinsecticide and TBb overexpressing an endogenous virulence factor, were tested for seasonal control of cereal aphids at the elongating (April 7) to milk ripening (May 12) stages of winter wheat crop in Yuhang, Zhejiang. Each of three field trials consisted of blank control and the treatments (three randomized 100‐m2 plots per capita) of each fungal strain sprayed biweekly at the rates of 1.0×1013 and 1.5×1013 conidia ha−1 and 10% imidacloprid WP sprayed biweekly at a label rate.RESULTSTiller infestation percentage and aphid density in the five‐week field trials after the first spray were reduced to 18.7–22.4% and 9.1–12.4 aphids per tiller in the fungal treatments, and 12.8–25.3% and 2.8–20.9 aphids per tiller in the chemical treatment, contrasting with 49.2–60.3% and 37.1–108.5 aphids per tiller in the control. Percent control efficacies (± SD) computed with weekly aphid densities over the period averaged 84.0±1.6 and 85.3±1.8 versus 78.0±4.0 and 79.9±3.2 in the high‐rate versus low‐rate treatments of Bb and TBb, respectively, and 84.5±7.8 in the chemical treatment. Imidacloprid showed faster kill action but more variable efficacy than the fungal treatments throughout the trials.CONCLUSIONEither Bb or TBb formulation competes with imidacloprid in reducing percent infestation and aphid density. The overall efficacy was significantly higher in the treatments of TBb than of Bb.

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Section: Introductionmentioning

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Emulsifiable oil‐formulated Beauveria bassiana competes with imidacloprid for seasonal control of cereal aphids in Zhejiang, China

Qi,

Shao,

Yang

et al. 2024

Pest Management Science

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“…As a result of probit analysis, the death time% (LT 50 ) was recorded as 6.02 days in B. bassiana isolate and 8.33 days in A. attenuatus isolate (Figure 2,3). When we look at the studies, as a result of the application of B. bassiana Bb-5a isolate to A. gossypii individuals under field conditions, a 75.1% reduction in the pest population was recorded (Ramanujam et al, 2018). As a result of the application of four Beauveria isolates and two Metarhizium isolates to A. gossypii at different temperatures, 73.33-93.33% mortality rates and LT 50 value 3.83-4.98 days at 25 °C; mortality rates of 82.22-100% at 30 °C and LT 50 values were recorded as 3.23-4.02 (Tesfaye and Seyoum, 2010).…”

Section: Resultsmentioning

confidence: 99%

Biological effects of Beauveria bassiana and Akanthomyces attenuatus isolates on Aphis gossypii Glover (Hemiptera: Aphididae)

Erol

Beram

Birgücü

2023

International Journal of Agriculture Environment and Food Sciences

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The biological effects of entomopathogenic species, Beauveria bassiana (Bals.-Criv.) Vuill and Akanthomyces attenuatus Zare & Gams on cotton aphid, Aphis gossypii Glover (Hemiptera: Aphididae) nymphs at 1x108 conidia concentration (ml-1) were investigated at the laboratory conditions. The experiments were conducted at 25°C, 65% relative humidity, and 16:8 hours of lighting in a climatic cabinets. Alive nymphs were recorded on the 1st, 3rd, 5th, 7th, and 9th days of incubation. B. bassiana caused higher mortality of the nymphs than A. attenuatus did. A statistical difference was determined between the isolates on the 7th and 9th days of the experiment. The highest mortality rates were determined in the isolate of B. bassiana with 72% and the isolate of A. attenuatus with 54% on the 9th day. The LT50 value for the isolates of B.bassiana and A. attenuatus was 6.02 days and 8.33 days, respectively.

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“…Sayed [10] reported that in rose production, the population of rose aphids, Macrosiphum rosae L, was reduced from 70.30 to 72.62%, treated with indigenous B. bassiana isolates, at 10 days after the fourth spraying. According to Ramanujam [11], Beauveria bassiana showed a reduction of 75.10% in chilli aphid, Aphis gossypii Glover, in field conditions. In another investigation, Filho [64] stated in their report that the population of M. persicae (Hemiptera: Aphididae) in cabbage plots treated with two isolates of B. bassiana, was significantly reduced from 57 to 60%.…”

Section: Discussionmentioning

confidence: 99%

“…Several entomopathogenic fungi species, viz., Beauveria bassiana, Metarhizium anisopliae, Lecanicillium lecanii, Paecilomyces carneus, and Paecilomyces farinosuss, have been reported to be effective against rose aphid, Macrosiphum rosae L., Aphis gossypii in chilli and brinjal, and insect pests on corn, both in laboratory and field conditions [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Field Efficacy of Proteolytic Entomopathogenic Fungi against Ceratovacuna lanigera Zehntner

2022

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Entomopathogenic fungi (EPF) are regarded as viable alternatives to insect pest control chemicals that contain a large amount of protease enzyme, which degrades the proteinaceous substances in insect cuticles. The aim of this study was to evaluate the field efficacy of protease-producing EPF against Ceratovacuna lanigera, and to assess the persistence of the Ceratovacuna lanigera, on sugarcane leaves. A total of 10 protease-producing fungi isolates were cultured from different agricultural soils, and identified as Purpureocillium lilacinum on the basis of the morphological features and molecular data, using ITS 1-5.8 S-ITS 2 of the rDNA sequences. The proteolytic activity of the isolates was assessed and expressed as an Enzyme Index (EI). Three isolates (PLTP5, PLPS8, and PLMC11) were found to be the best enzyme producers among the isolates, presenting EI values > 2.0 at 24 h, 48 h, and 72 h during incubation. These three isolates also gave the best results in terms of lethal concentrations (LC50 and LC90) and lethal time (LT50 and LT90) values, based on laboratory virulence evaluation, and were therefore selected for field application; commercial B. bassiana (GHA) was applied as standard treatment. An oil-based formulation of conidia (1 × 108 mL−1) of the isolates was applied in a sugarcane field experiment, with an interval of 10 days for four times. The results revealed that P. lilacinum (PLTP5) showed the highest reduction in the C. lanigera population, of 28.75, 56.02, 67.42, and 77.21%, respectively, after the first, second, third, and fourth spraying. The persistence of the conidia of the isolates on the sugarcane leaves was assessed. Per cent reductions in the conidia population, of 36.94–45.23%, 69.36–80.15%, and 81.75–92.96%, respectively, were found after three, six, and nine days of application. The application impact of EPF on the yield component and sugar content was evaluated. Purpureocillium lilacinum (PLTP5) showed the highest increase, of 18.15, 17.83, 15.07, 11.88, 23.73, and 19.38%, respectively, for leaf length, leaf width, cane height, cane girth, cane weight, and sugar content (brix). Our study indicated that P. lilacinum (PLTP5) was the most effective EPF against C. lanigera in field conditions, and also showed the highest proteolytic activity. Consequently, protease was considered the essential factor regulating the efficacy of P. lilacinum against C. lanigera. Protease would be useful, therefore, as an eco-friendly alternative to chemical pesticides, for the sustainable management of C. lanigera.

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Field Efficacy of Entomopathogenic Fungi against Brinjal and Chilli Aphid (Aphis gossypii Glover) (Homoptera: Aphididae)

Cited by 5 publications

References 0 publications

Emulsifiable oil‐formulated Beauveria bassiana competes with imidacloprid for seasonal control of cereal aphids in Zhejiang, China

Emulsifiable oil‐formulated Beauveria bassiana competes with imidacloprid for seasonal control of cereal aphids in Zhejiang, China

Biological effects of Beauveria bassiana and Akanthomyces attenuatus isolates on Aphis gossypii Glover (Hemiptera: Aphididae)

Field Efficacy of Proteolytic Entomopathogenic Fungi against Ceratovacuna lanigera Zehntner

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