Endophyte-mediated interactions between cauliflower, the herbivore Spodoptera litura, and the ectoparasitoid Bracon hebetor

Kaur, Tamanreet; Singh, Balbir; Kaur, Amarjeet; Kaur, Sanehdeep

doi:10.1007/s00442-015-3358-7

Cited by 17 publications

(11 citation statements)

References 48 publications

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“…This confirms our initial hypothesis that the development of parasitoids would be influenced by EF-treatment. There are many reports of fungal endophytes generally influencing the development of parasitoids and other natural enemies adversely [ 4 , 5 , 59 , 75 – 81 ]. In most cases, the production of fungal secondary metabolites (alkaloids in general) and subsequent changes to plant chemistry is presumed to be the cause of the observed negative effects.…”

Section: Discussionmentioning

confidence: 99%

Influence of the plant interacting entomopathogenic fungus Beauveria bassiana on parasitoid host choice-behavior, development, and plant defense pathways

et al. 2020

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Inoculating plants with entomopathogenic fungi may influence plant nutrient uptake and growth, and herbivore performance. Knowledge is limited concerning the effects of this symbiosis on higher trophic levels. We examined how fungal treatment of faba bean seeds with the entomopathogenic fungus Beauveria bassiana influenced the choice-behavior and development of the aphid parasitoid Aphidius colemani . We also sampled plant material for analysis of changes in expression of genes related to plant defense pathways. While parasitoids were compatible with plants inoculated with B . bassiana initially (66 vs. 65% parasitization on inoculated and control plants, respectively; similar development times of parasitoids: 9.2 days), the emergence of adult parasitoids originating from aphids on fungus treated plants was significantly lower (67 vs. 76%, respectively). We also found that the defense response changed, similar to induced systemic resistance, when plants were treated with B . bassiana , similarly to what has been found for other plant symbiotic microorganisms. These novel findings show that although the application of entomopathogenic fungi to plants can alter the plants’ defense against herbivores, it may also have an impact on beneficial insects, so their function and use should be evaluated on a case-by-case basis.

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Section: Discussionmentioning

confidence: 99%

Influence of the plant interacting entomopathogenic fungus Beauveria bassiana on parasitoid host choice-behavior, development, and plant defense pathways

et al. 2020

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“…Myzus persicae Aphidius colemani Vierick Reduction of pest development and parasitoid biology [24] Aspergillus flavus, A. niger S. littoralis Bracon hebetor Say Pest resistance and beneficial attraction [115] Neotyphodium lolii Agrotis ipsilon (Hufnagel)…”

Section: Beauveria Bassiana Metarhizium Brunneummentioning

confidence: 99%

From Diverse Origins to Specific Targets: Role of Microorganisms in Indirect Pest Biological Control

Francis

Jacquemyn

Delvigne

et al. 2020

Insects

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Integrated pest management (IPM) is today a widely accepted pest management strategy to select and use the most efficient control tactics and at the same time reduce over-dependence on chemical insecticides and their potentially negative environmental effects. One of the main pillars of IPM is biological control. While biological control programs of pest insects commonly rely on natural enemies such as predatory insects, parasitoids and microbial pathogens, there is increasing evidence that plant, soil and insect microbiomes can also be exploited to enhance plant defense against herbivores. In this mini-review, we illustrate how microorganisms from diverse origins can contribute to plant fitness, functional traits and indirect defense responses against pest insects, and therefore be indirectly used to improve biological pest control practices. Microorganisms in the rhizosphere, phyllosphere and endosphere have not only been shown to enhance plant growth and plant strength, but also promote plant defense against herbivores both above- and belowground by providing feeding deterrence or antibiosis. Also, herbivore associated molecular patterns may be induced by microorganisms that come from oral phytophagous insect secretions and elicit plant-specific responses to herbivore attacks. Furthermore, microorganisms that inhabit floral nectar and insect honeydew produce volatile organic compounds that attract beneficial insects like natural enemies, thereby providing indirect pest control. Given the multiple benefits of microorganisms to plants, we argue that future IPMs should consider and exploit the whole range of possibilities that microorganisms offer to enhance plant defense and increase attraction, fecundity and performance of natural enemies.

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“…Surprisingly, this endophyte still enhanced pest control by deterring the predator from feeding on the plant, thereby increasing its feeding activity on the prey. The parasitoid Bracon hebetor Say, when parasitizing larvae of Spodoptera litura Fabricius feeding on cauliflower inoculated by Aspergillus spp., experienced prolonged development time of the larvae and reduced parasitism rates by the adults (Kaur et al 2015 ). Thus, the use of Class II endophytic fungi for control of herbivorous pests in greenhouses needs to be tested on a case by case basis for each plant-herbivore-natural enemy-interaction.…”

Section: Combining Microorganisms With Arthropod Natural Enemiesmentioning

confidence: 99%

New opportunities for the integration of microorganisms into biological pest control systems in greenhouse crops

et al. 2016

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Biological pest control with mass-produced arthropod natural enemies is well developed in greenhouse crops and has often resulted in the evolution of complex ecosystems with persistent populations of multiple arthropod natural enemy species. However, there are cases where arthropod natural enemies are either not effective enough, not available, or their use is rather costly. For these reasons, biological control based on microorganisms, also referred to as ‘microbials’, represents a complementary strategy for further development. Although commercially available microbials have been around for quite some time, research on and the applied use of combinations of arthropod natural enemies and microbials have remained relatively under explored. Here, we review current uses of entomopathogenic fungi, bacteria and viruses, and their possible direct and indirect effects on arthropod natural enemies in European greenhouses. We discuss how microbials might be combined with arthropod natural enemies in the light of new methodologies and technologies such as conservation biological control, greenhouse climate management, and formulation and delivery. Furthermore, we explore the possibilities of using other microorganisms for biological control, such as endophytes, and the need to understand the effect of insect-associated microorganisms, or symbionts, on the success of biological control. Finally, we suggest future research directions to optimize the combined use of microbials and arthropod natural enemies in greenhouse production.

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Endophyte-mediated interactions between cauliflower, the herbivore Spodoptera litura, and the ectoparasitoid Bracon hebetor

Cited by 17 publications

References 48 publications

Influence of the plant interacting entomopathogenic fungus Beauveria bassiana on parasitoid host choice-behavior, development, and plant defense pathways

Influence of the plant interacting entomopathogenic fungus Beauveria bassiana on parasitoid host choice-behavior, development, and plant defense pathways

From Diverse Origins to Specific Targets: Role of Microorganisms in Indirect Pest Biological Control

New opportunities for the integration of microorganisms into biological pest control systems in greenhouse crops

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