Bacillus bombysepticus, an Entomopathogen in Yellow-Spined Bamboo Locust with Biocontrol Potential

Area of Science:

• Agricultural Entomology
• Microbial Biocontrol
• Forest Pest Management

Background:

• Ceracris kiangsu is a major pest of bamboo plantations in Vietnam.
• Effective biocontrol strategies are needed for sustainable bamboo management.

Purpose of the Study:

• To identify potential biocontrol agents against Ceracris kiangsu from its own population.
• To evaluate the efficacy of isolated Bacillus bombysepticus strains as a biopesticide.

Main Methods:

• Bacteria were isolated from parasitized Ceracris kiangsu nymphs.
• Nursery and field trials were conducted to assess nymph mortality and feeding damage reduction.
• Efficacy was compared to a commercial Bacillus thuringiensis product.

Main Results:

• Three Bacillus bombysepticus isolates (FPRC17, FPRC23, FPRC30) caused 63-68% nymph mortality within 9 days.
• These results were comparable to a commercial Bacillus thuringiensis product.
• Field trials showed over 70% reduction in feeding damage 15 days post-application.

Conclusions:

• Bacillus bombysepticus isolates show significant potential as a natural biopesticide for Ceracris kiangsu.
• This discovery offers a sustainable solution for bamboo locust management in Vietnam.
• Further development could lead to a novel, eco-friendly pest control product.