GB/T 33124-2016 in English

Basic information and biological characteristics of poplar leaf rust

Chinese name:Poplar leaf rust
Scientific name:Melampsora medusa Thümen, 1878
Host range:Poplar, black cottonwood, American black poplar and pine

Transmission pathways and symptoms

Mainly spread over long distances through summer spores and winter spores. It appears as light yellow spots on the host plant, and in severe cases, the leaves dry up and fall off.

Detection and identification methods

Sample collection and preparation

• Symptom inspection: Start from the lower leaves and check for diseases layer by layer
• Sampling method: Random or targeted sampling, follow SN/T2122 standard
• Sample preparation: Including slice and needle puncture preparation techniques

Key points of morphological identification

Focus on the morphological characteristics of summer spores, such as size, shape, wall thickness and spine structure. The table compares the differences between poplar leaf rust and similar species, especially Alberta poplar and poplar leaf rust.

Implementation suggestions

1. Optimization of detection process:It is recommended to use ultra-low temperature preservation to preserve summer spores to ensure long-term sample availability.

2. Specimen management:Standardize the dry specimen production process to ensure the specimen shelf life and quality.

3. Technical training:Strengthen the microscopic operation skills and pathogen identification capabilities of testing personnel.