Walnut twig beetle - Pityophthorus juglandis
EEffective: May 16, 2011 - May 23, 2012
Resources:
Pest Tracker
Screening Aids:
| Pityophthorus juglandis - Walnut Twig Beetle Screening Aid |
Taxonomic Position:
Coleoptera : Scolytidae
Pest Type:
Insects
Pest Code (NAPIS):
INBQTOA
| No manual – See Host Matrix |
These Approved Methods are appropriate for:
Human and Animal Pathogens Transmitted:
Not known to transmit any human or animal pathogens.
Plant Pathogens and Organisms Vectored:
Pityophthorus juglandis vectors the Geosmithia morbida fungus which causes "thousand cankers disease" (TCD) in walnut trees.
Survey
Approved Method(s):
| Method | Product Name / Instructions | NAPIS Survey Method |
|---|---|---|
| Visual | Follow instructions in the survey protocol: Thousand Cankers Disease Survey Guidelines for 2011 (USDA FS and PPQ, 2011). |
3031 - General Visual Observation |
Identification
ID/Diagnostic: Morphological
Morphological. Pityophthorus is a large genus (>100 species in North America) and identification to species can be difficult since these are very small beetles and the distinguishing characters are often hard to discern without high magnification and good optics. To screen samples, refer to the screening aid by Labonte and Rabaglia (2010) and the TCD Guidelines for 2012. Suspect specimens should be submitted to an identification specialist for verification (follow the instructions in the TCD Guidelines for 2012).
Mistaken Identities:
Other native Pityophthorus spp.
References