Effects of Phytoplasma Infection on Aster Leafhopper (Macrosteles quadrilineatus) Settling Behavior and Development on Brassica napus

Aster yellows phytoplasma (AYp) is a mollicute that infects numerous crops, including canola (Brassica napus L.), in which it is pathogenic, and is transmitted by the aster leafhopper (Macrosteles quadrilineatus Forbes). Understanding how AYp infection alters vector behavior and development is critical for predicting disease dynamics in agricultural systems. We used two‐choice and no‐choice bioassays to assess settling preferences and developmental performance of AYp‐infected and uninfected leafhoppers on AYp‐infected and uninfected B. napus. Arabidopsis thaliana L. was included as a reference host for developmental comparisons. At 2 weeks post‐infection, leafhoppers showed a significant preference for AYp‐infected plants; by 4 weeks, this preference disappeared. Uninfected leafhoppers produced significantly more nymphs on AYp‐uninfected plants than on AYp‐infected plants, although survival on B. napus was poor, and no individuals completed development. Phytoplasma titers in plants increased over time and corresponded with symptom severity. These results show that while AYp infection briefly influences vector settling behavior, B. napus is a marginal host that does not support full development, providing insight into vector–pathogen interactions and disease epidemiology in canola systems.

• Publication year

  2025

• Venue

  Entomologia Experimentalis et Applicata

• Publication date

  2025-11-18

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1111/eea.70036
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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