Rizobacteria in the control of pest insects in agriculture

Abstract

Biological control of pest insects in agriculture is the focus of many studies, because of the risks in the continuous use of synthetic insecticides, which can cause resistant pests or the occurrence of secondary pests. The use of microorganisms like endophytic bacteria has been performed separately or combined with other forms of control in the Integrated Pest Management. Endophytic bacteria live inside host plants, without causing any apparent damage or pathogenicity symptom. Besides performing many functions important to the host, these microorganisms are potentially useful in agriculture, since they are capable of substituting chemical products. By performing biocontrol actions and/or promoting plant growth, these microorganisms are favoring environmental preservation and are thus identified as a viable alternative for ecologically and economically sustainable agricultural production systems. Given the above, this review aimed to present a panorama of the potential application of plant growth-promoting bacteria in the control of pest insects in agriculture, in view of the great biotechnological advances.

Endophytic Strain Bacillus subtilis 26DCryChS Producing Cry1Ia Toxin from Bacillus thuringiensis Promotes Multifaceted Potato Defense against Phytophthora infestans (Mont.) de Bary and Pest Leptinotarsa decemlineata Say

“…In consortiums, the set of relationships between microorganisms can lead to incalculable effects in plants under the influence of multiple biotic factors. Thus, we assume that recombinant endophytic B. subtilis strains are capable of protecting crops from a number of pathogens or insect pests [8,11,21,26].…”

Bacillus velezensis YC7010 Enhances Plant Defenses Against Brown Planthopper Through Transcriptomic and Metabolic Changes in Rice

“…Systemic resistance induced in plant by certain beneficial PGPR or endophytic bacteria commonly found inside roots against insect pests (Pineda et al, 2010; Van de Mortel et al, 2012; de Oliveira Araujo, 2015). These bacteria with ability to enhance plant growth and development have the potential to be utilized for biological control of numerous insect pests.…”

Potential of ribonuclease-sinthesizing plant growth promoting rhizobacteria in plant defence against viruses

“…Bacterial endophytes have an advantage over bacteria inhabiting the rhizo-or phyllosphere, since living within a plant's tissues represents an opportunity to always be in "contact" with the plant's cells and, therefore, to more readily exert a direct beneficial effect on plant hosts, and to reduce the influence of the environmental conditions on PGPB. It was shown (Araújo et al, 2015) that a number of Bacillus strains have fungicidal, insecticidal, aphycidal (Araújo et al, 2015;Yang et al, 2017) and growth-promoting activities (Pieterse et al, 2014), synthesize antibiotics and biosurfactants (De Vleesschauwer, Höfte 2009), promote induced systemic resistance (ISR) against pathogens and pests (Rashid, Chung 2017). There is a wealth of data on endophyte influence on plant viability, and the most recent are investigations of the problem of artificial plant microbial community on the basis of growth-promoting bacteria (Moronta-Barrios et al, 2018).…”