Study on bacteriostatic activity of bacillus against penicillium extensus and its application to pear

Abstract. Currently, research has shown that Bacillus plays a crucial role in preserving, storing, and transporting fruit and vegetable products, leading to positive economic outcomes. Through the discussion results, it was found that Bacillus polymyxoid HT16 had a remarkable inhibitory effect on Streptospora nigrospora of pear. The observations made using scanning electron microscope and it revealed that the spores of the pathogenic bacteria barely germinated after the treatment of crude protein extraction. Additionally, there was a noticeable ablation phenomenon, with the mycelium appearing twisted and atrophied. Furthermore, the outer epidermis of the mycelium was shed and broken. Similarly, the bacteria used for biocontrol also demonstrated a significant impact on suppressing harmful bacteria in grape plants, contributing to the ongoing research on the mechanisms behind grape biocontrol. Providing a theoretical basis for the application of Bacillus amyloolytica 22T in pear biological control, the antibacterial activity against penicillium extensus was evaluated. This passage provides a review of the inhibitory activity of bacillus against penicillin expansus.