Jujube witches' broom - Candidatus Phytoplasma ziziphi 16SrV-B
Taxonomic Position: Acholeplasmatales : Acholeplasmataceae
Pest Type: Phytoplasma
Pest Code (NAPIS): FEAGMKW
This pest is a member of the following surveys: Stone Fruit
These Approved Methods are appropriate for: 2023
||Product / Instructions
||NAPIS Survey Method
||Collect symptomatic plant material.
||3031 - General Visual Observation
The following are recommendations for executing the survey using the approved methods for pest surveillance. The recommendations are developed through literature review and consultation with subject matter experts.
Signs and Symptoms
Symptoms include the characteristic witches’ broom appearance, in which the plant produces numerous small shoots with smaller than normal leaf size and yellowish green foliage, shortened internodes and excessive branching (Yu et al., 2012). Infection creates a typical yellow dwarf symptom in the whole plant, fruits may shrivel and prematurely drop, and the disease may commonly lead to decline and premature plant death (Wang et al., 2015).
Time of Year to Survey
Survey during the growing season when symptoms are most likely to be visible.
Survey Site Selection
Survey where hosts are present.