Effects of Pseudomonas chlororaphis strain AFS009 and Beauveria bassiana strain GHA against Plumeria rust in Hawaii

This study examined the effects of beneficial rhizobacterium Pseudomonas chlororaphis strain AFS009 and entomopathogenic fungus Beauveria bassiana GHA against plumeria rust Coleosporium plumeriae. Two preemptive or three curative laboratory experiments a field experiment were conducted to examine these commercially available biocontrol products. Treatments included application B. at 1.23 g/L P. 3 9 g/L. Systemic fungicide azoxystrobin applied 0.12 water as positive negative controls, respectively. While its effect was insignificant in the trial, reduced pustule development one two trials. In contrast, suppressed number pustules both experiments, demonstrating potential biological activity rust. observed 14 days post-treatment, suggesting that an interval on infected plants can take under control.