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[Study on the biology feature and pathogenicities to silkworm of a microsporidium isolated from Barathra brassicae L]
1Institute of Sericulture, Guangdong Academy of Agricultural Sciences, Guangzhou 510640.
Abstract:
A microsporidium (called as Bab-M) was isolated from Barathra brassicae L. captured from suburban vegetable plot of Guang Zhou. The spores were long-ovoid in shape and 4.02 +/- 0.36 microns x 1.99 +/- 0.36 microns in size. Immunologically the microsporidium shared spore surface specific antigen(s) with N. bombycis. The ultrastructure and life cycle of Bab-M were similar to that of N. b.. The rate of transovarian transmission was high. The initial conclusion was that Bab-M should be referred to as Nosema bombycis, but there was variation between them.
Insights
A newly identified microsporidium, Bab-M, from the cabbage armyworm shares antigens with Nosema bombycis. Despite similarities, variations suggest it may be a distinct species, impacting pest control strategies.
Area of Science:
- Entomology
- Microbiology
- Parasitology
Context:
- A novel microsporidium, designated Bab-M, was isolated from the cabbage armyworm (Barathra brassicae L.) in Guangzhou.
- The pathogen was found in a suburban vegetable plot, indicating potential agricultural relevance.
Purpose:
- To characterize the isolated microsporidium (Bab-M) based on morphology, immunology, and life cycle.
- To compare Bab-M with the known microsporidian Nosema bombycis.
- To determine the taxonomic status of Bab-M.
Summary:
- Bab-M exhibits long-ovoid spores (4.02 x 1.99 µm) and shares spore surface antigens with Nosema bombycis.
- Ultrastructural and life cycle analyses reveal similarities between Bab-M and Nosema bombycis.
- A high rate of transovarian transmission was observed in Bab-M.
Impact:
- The findings suggest Bab-M may represent a distinct species within the Nosema genus, necessitating further taxonomic investigation.
- Understanding Bab-M's characteristics is crucial for developing targeted pest management strategies against the cabbage armyworm.
- This research contributes to the knowledge of microsporidian diversity and their impact on insect populations.
