Density-dependent interactions between the nematode Meloidogyne incognita and the biological control agent Agasicles hygrophila on invasive Alternanthera philoxeroides and its native congener Alternantera sessilis

Abstract Alternanthera philoxeroides (Mart.) Griseb. is an invasive herbaceous amphibious weed species in China. A pyralid moth Herpetogramma basalis (Walker) was discovered feeding on A. philoxeroides through field surveys and may be a potentially useful biocontrol agent. To determine the host range of H. basalis and evaluate its potential to control A. philoxeroides, no-choice and multiple-choice tests were conducted. Herpetogramma basalis fed on target weeds and 29 nontarget plant species. In addition to the target weed A. philoxeroides, H. basalis developed to adult on eight other nontarget species. Herpetogramma basalis survived to adulthood successfully on A. philoxeroides and less successfully on several other Amaranthaceae species. In multiple-choice studies, H. basalis showed a strong oviposition preference for A. philoxeroides over Amaranthus tricolor L. (Centrospermae: Amaranthaceae). Amaranthus tricolor was the only crop plant that supported the complete development of H. basalis. We cautiously recommend H. basalis for the biological control of A. philoxeroides in China.

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Evaluation of Efficacy of Paecilomyces Lilacinus as Biological Control Agent of Meloidogyne Incognita Attacking Tomato

Journal of Plant Protection Research ◽

10.2478/v10045-009-0053-x ◽

2009 ◽

Vol 49 (4) ◽

pp. 337-340 ◽

Cited By ~ 17

Author(s):

Elvira Oclarit ◽

Christian Cumagun

Keyword(s):

Biological Control ◽

Meloidogyne Incognita ◽

Biological Control Agent ◽

Control Agent ◽

Paecilomyces Lilacinus ◽

Egg Mass ◽

Root Weight ◽

Egg Masses ◽

Root Sample ◽

Gall Index

Evaluation of Efficacy of Paecilomyces Lilacinus as Biological Control Agent of Meloidogyne Incognita Attacking Tomato The efficacy of Paecilomyces lilacinus strain UP1 as biological control agent of Meloidogyne incognita attacking tomato was evaluated under screenhouse condition pot experiments. P. lilacinus was formulated on rice substrate in powder form. Root weight, gall index rating, number of galls, egg masses and nematodes per one gram root sample were determined and per cent reduction in gall number was computed. Root weight and gall index ratings were significantly higher in untreated plants than those with P. lilacinus and with the commercial fungicide Nemacur. Number of galls, nematodes and egg masses per one gram root sample were significantly reduced by the application of P. lilacinus at all levels and this was comparable with Nemacur. However, egg mass count in plants treated with the lowest concentration of the biocontrol agent was not significantly different from the uninoculated control. Per cent reduction in gall number was the highest at treatment with 7.92 × 106 spores per ml of P. lilacinus.

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Verticillium Chlamydosporium as a Biological Control Agent for Meloidogyne Incognita and M. Hapla in Pot and Micro-Plot Tests

Nematologica ◽

10.1163/187529293x00097 ◽

1993 ◽

Vol 39 (1-4) ◽

pp. 115-126 ◽

Cited By ~ 57

Author(s):

J.A. Dennehy ◽

B.R. Kerry ◽

F.A.A.M. De Leij

Keyword(s):

Biological Control ◽

Meloidogyne Incognita ◽

Biological Control Agent ◽

Control Agent ◽

Verticillium Chlamydosporium

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Isolation and effect of Trichoderma citrinoviride Snef1910 for the biological control of root-knot nematode, Meloidogyne incognita

BMC Microbiology ◽

10.1186/s12866-020-01984-4 ◽

2020 ◽

Vol 20 (1) ◽

Author(s):

Haiyan Fan ◽

Meiling Yao ◽

Haiming Wang ◽

Di Zhao ◽

Xiaofeng Zhu ◽

...

Keyword(s):

Biological Control ◽

Meloidogyne Incognita ◽

Plant Biomass ◽

Biological Control Agent ◽

Control Agent ◽

Vegetable Crops ◽

Root Knot Nematode ◽

Egg Hatching ◽

Tomato Plants ◽

Trichoderma Citrinoviride

Abstract Background Root-knot nematode is one of the most significant diseases of vegetable crops in the world. Biological control with microbial antagonists has been emerged as a promising and eco-friendly treatment to control pathogens. The aim of this study was to screen and identify novel biocontrol agents against root-knot nematode, Meloidogyne incognita. Results A total of 890 fungal isolates were obtained from rhizosphere soil of different crops and screened by nematicidal activity assays. Snef1910 strain showed high virulence against second stage juveniles (J2s) of M. incognita and identified as Trichoderma citrinoviride by morphology analysis and biomolecular assay. Furthermore, T. citrinoviride Snef1910 significantly inhibited egg hatching with the hatching inhibition percentages of 90.27, 77.50, and 67.06% at 48, 72, and 96 h after the treatment, respectively. The results of pot experiment showed that the metabolites of T. citrinoviride Snef1910 significantly decreased the number of root galls, J2s, and nematode egg masses and J2s population density in soil and significantly promoted the growth of tomato plants. In the field experiment, the biocontrol application showed that the control efficacy of T. citrinoviride Snef1910 against root-knot nematode was more than 50%. Meanwhile, T. citrinoviride Snef1910 increased the tomato plant biomass. Conclusions T. citrinoviride strain Snef1910 could be used as a potential biological control agent against root-knot nematode, M. incognita.

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