Bacillus peptides and the suppression of pathogens and pests in fruit trees

Pathogens and pests are undoubtedly among the most significant stressors for plants, including ornamental, agricultural, and fruit-bearing species.

🐛 Throughout the growing season, fruit trees are exposed to numerous diseases and pests that can significantly reduce yields and plant growth.

🦠 One possible solution may be Bacillus strains, which belong to the group of plant growth-promoting bacteria (PGPR) and represent an ecological alternative to pesticides.

🔬 A 2024 study on the effects of Bacillus species showed that the peptides they produce control effectively:

• moniliosis (Monilinia spp.) in stone fruit trees, such as peaches, apricots, and cherries, by inhibiting the pathogen’s growth,

• fire blight (Erwinia amylovora) in apple and pear trees by damaging cell membranes and causing the pathogen’s cellular contents to leak out,

• bacterial canker (Pseudomonas syringae) by producing siderophores that limit the pathogen’s access to iron.

📖 Bacillus strains also affect fruit tree pests, including:

• the codling moth (Cydia pomonella),

• aphids (Aphididae).

📊 Research indicates that Bacillus strains effectively reduce the incidence of fungal and bacterial diseases, as well as minimize damage caused by insects.

💡 Bacteria of the genus Bacillus not only promote plant growth but also mitigate the negative effects of biotic stresses on fruit trees.