Utilization of Biological Control for Managing Plant-Parasitic Nematodes

Timper, Patricia

doi:10.1007/978-1-4020-9648-8_11

Cited by 43 publications

(24 citation statements)

References 118 publications

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“…However, nematode densities decreased to near and below detectable levels in soil and roots, respectively, at the end of the study in site M10.23, but not in site M10.55, in which RKN was always detected. Agricultural practices such as crop rotation, tillage and organic amendments have been proved to influence the antagonistic potential of soil (Sikora, 1992 ; Kerry and Bourne, 1996 ; Westphal and Becker, 2001 ; Janvier et al, 2007 ; Timper, 2011 ), and could be the reason for the results of this study. For instance, site M10.23 was fertilized with a mixture of sheep and chicken manure but only sheep manure was used at M10.55.…”

Section: Discussionmentioning

confidence: 69%

“…In this study, two suppressive soils to RKN were identified, increasing the list of previous studies reporting this kind of agricultural soil (Stirling et al, 1979 ; Gaspard et al, 1990 ; Pyrowolakis et al, 2002 ; Timper, 2011 ; Adam et al, 2014 ). However, as far as the authors know, this is the first report of suppressive soils to RKN in which vegetables are cultivated organically in plastic greenhouses.…”

Section: Discussionmentioning

confidence: 84%

“…In a suppressive soil, pathogens do not establish, persist, or establish but cause little or no damage (Baker and Cook, 1974 ). Suppressive soils have already been described for many soil pathogens (Weller et al, 2002 ) including plant parasitic nematodes (Timper, 2011 ). Suppressive soils to cyst nematodes and RKN have been intensively studied.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Soil Suppressiveness to Root-Knot Nematodes in Organic Horticulture in Plastic Greenhouse

et al. 2016

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The fluctuation of Meloidogyne population density and the percentage of fungal egg parasitism were determined from July 2011 to July 2013 in two commercial organic vegetable production sites (M10.23 and M10.55) in plastic greenhouses, located in northeastern Spain, in order to know the level of soil suppressiveness. Fungal parasites were identified by molecular methods. In parallel, pot tests characterized the level of soil suppressiveness and the fungal species growing from the eggs. In addition, the egg parasitic ability of 10 fungal isolates per site was also assessed. The genetic profiles of fungal and bacterial populations from M10.23 and M10.55 soils were obtained by Denaturing Gradient Gel Electrophoresis (DGGE), and compared with a non-suppressive soil (M10.33). In M10.23, Meloidogyne population in soil decreased progressively throughout the rotation zucchini, tomato, and radish or spinach. The percentage of egg parasitism was 54.7% in zucchini crop, the only one in which eggs were detected. Pochonia chlamydosporia was the only fungal species isolated. In M10.55, nematode densities peaked at the end of the spring-summer crops (tomato, zucchini, and cucumber), but disease severity was lower than expected (0.2–6.3). The percentage of fungal egg parasitism ranged from 3 to 84.5% in these crops. The results in pot tests confirmed the suppressiveness of the M10.23 and M10.55 soils against Meloidogyne. The number of eggs per plant and the reproduction factor of the population were reduced (P < 0.05) in both non-sterilized soils compared to the sterilized ones after one nematode generation. P. chlamydosporia was the only fungus isolated from Meloidogyne eggs. In in vitro tests, P. chlamydosporia isolates were able to parasitize Meloidogyne eggs from 50 to 97% irrespective of the site. DGGE fingerprints revealed a high diversity in the microbial populations analyzed. Furthermore, both bacterial and fungal genetic patterns differentiated suppressive from non-suppressive soils, but the former showed a higher degree of similarity between both suppressive soils than the later.

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Section: Discussionmentioning

confidence: 69%

Section: Discussionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

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Characterization of Soil Suppressiveness to Root-Knot Nematodes in Organic Horticulture in Plastic Greenhouse

et al. 2016

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“…EC 1107/2009; 459/2010 and 293/2013). Therefore, attention has been focused on alternatives to chemicals at low environmental impact [7][8][9][10][11][12]. An interesting alternative is the use of bio-pesticides which are generally based on the direct effect of fungi and bacteria or their exametabolites [13,14].…”

Section: Introductionmentioning

confidence: 99%

Abamectin Efficacy on the Potato Cyst Nematode Globodera pallida

Sasanelli

Toderaş

Veronico

et al. 2019

Plants

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The potato cyst nematode Globodera pallida is a major pest of the potato crop. Abamectin is a biological pesticide showing high nematicide activity, but its efficacy to control G. pallida has not been investigated to date. In this study, combination of different abamectin concentrations ranging from 1.125 to 36 µg/mL x exposure times from 24 to 384 h were tested on the nematode in a hatching test. Abamectin induced mortality with LD50 value in the range of 13.23 (after 24 h) to 2.90 µg/mL (after 384 h). A glasshouse experiment was also performed in pots filled with soil infected with G. pallida in the presence of sprouted potato tubers cultivar “Spunta”. Abamectin at 4.5, 9.0, 18.0 and 36.0 µg/mL was used in comparison with nematicide fosthiazate. The doses of 18 and 36 µg/mL significantly reduced number of eggs, juveniles, cyst/g soil and reproduction rate in comparison to both untreated control and fosthiazate treatment. Soil applications of abamectin provided significant G. pallida control with LD50 and LD99.9 of 14.4 and 131.3 µg/mL, respectively. These results indicate the efficacy of abamectin to control G. pallida on potato crops and its potential use in organic agriculture or in an integrated pest management program.

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“…The densities of six nematode genera in eggplant and pepper that were intercropped with African marigold were significantly reduced (Alam et al 1977). Rotations with poor or non-host crops for nematodes result in lower pest density in soil and higher yield comparing with continuously growing host crops (Timper 2009(Timper , 2011. As reported by Natarajan in 2006, the plant height, leaf number, and fruit of Lycopersicon esculentum plants treated with whole plant extracts of T. erecta were significantly higher or better than those grown in untreated nematode-infected soils (Natarajan et al 2006).…”

Section: Discussionmentioning

confidence: 87%

Crop rotation and intercropping with marigold are effective for root-knot nematode (Meloidogyne sp.) control in angelica (Angelica sinensis) cultivation

Xie¹,

Cui²,

Dong³

et al. 2016

Can. J. Plant Sci.

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This study was aimed to investigate the control efficiency of crop rotation (CR) and intercropping systems for root-knot nematodes (Meloidogyne sp.) in angelica (Angelica sinensis). Plants of angelica were intercropped with marigold (Tagetes erecta) plants in row-intercropping (RI) and plant-intercropping (PI) models in 2013. The continuous cropping (CC) model and sole cropping (SC) were used as the controls. The density change rate of nematodes in CR models (−83.63% and −72.61%) was lower than those in CC models. The CR model in 2013 showed the highest nematode control efficiency (44.83%), angelica yield (199.49 kg plot −1), and output value (65971.50 yuan Renminbi ha −1), and were the highest amongst the five models. The RI model showed a lower density change rate of nematodes (−23.34%) and a higher control efficiency for disease (36.63%) compared with the SC model. Both the rotation and intercropping models were efficient for controlling nematodes in angelica, and the rotation model was more effective than the intercropping models.

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Utilization of Biological Control for Managing Plant-Parasitic Nematodes

Cited by 43 publications

References 118 publications

Characterization of Soil Suppressiveness to Root-Knot Nematodes in Organic Horticulture in Plastic Greenhouse

Characterization of Soil Suppressiveness to Root-Knot Nematodes in Organic Horticulture in Plastic Greenhouse

Abamectin Efficacy on the Potato Cyst Nematode Globodera pallida

Crop rotation and intercropping with marigold are effective for root-knot nematode (Meloidogyne sp.) control in angelica (Angelica sinensis) cultivation

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