Greenhouse and field assessment of biological and chemical agents against guava decline

Alves, Cintia da Silva; Starling, Renan Zappavigna Costa; Rodrigues, Lilian Lagen; Nascimento, Maria Laura Urbano; Vargas, Amanda Dutra de; Reis, Ualace Oliveira dos; Camara, Guilherme de Resende; Moraes, Wilian Bucker; Xavier, André da Silva; Alves, Fábio Ramos

doi:10.1590/0100-5405/225806

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…and the fungus Trichoderma and/or biofertilizers. These antagonists can occur naturally, by manipulating the environment or by introducing one or more antagonistic organisms into crop areas (Lima et al, 2002;Ferreira et al, 2008;Alves et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Quantification of Damage and Yield Losses and Management of Meloidogyne Exigua in Arabica Coffee Treated With Biofertilizers, Biopesticides and Chemical Nematicide

Figueiredo

Barbosa

Moraes

et al. 2023

Preprint

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The objective of this work was to verify if biofertilizers, biopesticides and chemical nematicide reduced the population of M. exigua in coffee in 2019 and 2020. The treatments were: T1: Organic biofertilizer containing Bacillus subtilis, B. licheniformis and Lactobacillus sp. (Bio1); T2: Bio1 + Bio1; T3: Bio1 + 100% organic biofertilizer rich in organic matter, humic and fulvic acids (Bio2); T3: Bio1 + Bio2; T4: biopesticide based on B. subtilis and B. licheniformis (Bio3); T5: biopesticide based on Trichoderma harzianum (Bio4); T6: Fluensulfone; T7: Bio1 + Fluensulfone and T8: Control. The experiment was carried out in a field of arabica coffee cv. Catuaí in a randomized block design in an 8x6 factorial scheme (8 treatments x 6 collection periods) with four blocks. The evaluations were carried out at 0, 120, 180, 240, 360 and 420 days after application of the products (DAA). Yield losses and relative efficiency (RE) of the treatments was calculated. The treatment that most reduced the population of M. exigua in the roots was T7 (50.91) and in the soil was T6. The RE ranged from 34.77–45.04%. At 180 and 420 DAA we observed reduction of the nematode in the roots. The highest yields in 2019 were observed in plants treated with T1 and T5, whereas in 2020 it was in plants that received T2, T6 and T7. In 2019, except for T6, all treatments resulted in increased productivity. In 2020, the treatments that brought the most profit to the coffee grower were T6 and T7.

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Section: Introductionmentioning

confidence: 99%

Quantification of Damage and Yield Losses and Management of Meloidogyne Exigua in Arabica Coffee Treated With Biofertilizers, Biopesticides and Chemical Nematicide

Figueiredo

Barbosa

Moraes

et al. 2023

Preprint

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Biological attributes of Salibro™, a novel sulfonamide nematicide. Part 3: biocompatibility with beneficial soil fungi

Thoden¹,

Alkader

Markakis³

et al. 2022

Nematol.

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Summary Over the last few years, novel synthetic nematicides, such as Salibro™ nematicide (a.s. fluazaindolizine - Reklemel™ active), Velum Prime® (a.s. fluopyram) or Nimitz® (a.s. fluensulfone), have been commercialised in various regions around the world. Whilst considerable scientific information exists on their field efficacy against plant-parasitic nematodes, very little has been published on their bio-compatibility with beneficial soil fungi. In this paper in vitro studies are presented with various nematophagous (Athrobotrys, Monacrosporium, Harposporium, Purpureocillium), entomoparasitic (Beauveria, Isaria) and disease-suppressive (Trichoderma) fungi that were exposed to these nematicides under laboratory conditions. Assessments were made on their impact on radial growth and sporulation of those fungi. Clear differences in sensitivity to the nematicides were seen between the different fungi. Intrinsically, fluopyram showed the strongest adverse effects on the tested fungi that often became already visible at a concentration of 5 ppm (a.s.). Negative effects were significant at higher concentrations of 50 ppm. Fluensulfone showed limited adverse impacts on the tested fungi at 5 ppm (a.s.) but clearly inhibited most of the fungi at 50 ppm (a.s.). Fluazaindolizine had the least impact of the novel nematicides, with no adverse effects recorded on any species at 5 ppm (a.s.), and very minor growth reductions at 50 ppm (a.s.). Even when tested at 250 ppm (a.s.) fluazaindolizine still showed no impact on Purpureocillium lilacinum, as well as only a weak impact on some Trichoderma species. Vydate (a.s. oxamyl), which was often included as a traditional carbamate nematicide in the test, also showed excellent bio-compatibility with the tested fungi at concentrations of from 5 to 50 ppm (a.s.). Overall, the studies showed that beneficial soil fungi differ in their intrinsic sensitivity to these modern nematicides. These interactions may be considered when designing integrated nematode management programmes that leverage endemic or introduced biocontrol agents. However, it should be noted that additional studies under field conditions with recommended label rates of the products are needed to confirm the trends seen in these laboratory data.

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Greenhouse and field assessment of biological and chemical agents against guava decline

Cited by 2 publications

References 12 publications

Quantification of Damage and Yield Losses and Management of Meloidogyne Exigua in Arabica Coffee Treated With Biofertilizers, Biopesticides and Chemical Nematicide

Quantification of Damage and Yield Losses and Management of Meloidogyne Exigua in Arabica Coffee Treated With Biofertilizers, Biopesticides and Chemical Nematicide

Biological attributes of Salibro™, a novel sulfonamide nematicide. Part 3: biocompatibility with beneficial soil fungi

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