Christmas berry webworm - Cryptoblabes gnidiella
Effective: August 5, 2013
Taxonomic Position: Lepidoptera : Pyralidae
Pest Type: Insects
Pest Code (NAPIS): ITBMDPA
This pest is a member of the following surveys: Grape
These Approved Methods are appropriate for: 2024, 2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015
Pest Information
CAPS Pest Datasheet: https://download.ceris.purdue.edu/file/3064
Pest Tracker: https://pesttracker.org/pest/ITBMDPA
Hosts Identified in the CAPS Host Matrix:
Avocado; Citrus; Grape; Pomegranate
Human and Animal Pathogens Transmitted:
Not known to transmit any human or animal pathogens.
Pest Pathogens and Organisms Vectored:
When grapes are attacked by larvae close to harvesting, juice leakage can lead to rot by secondary pathogens which can reduce wine quality. Grape grey mold can increase with high population densities of C. gnidiella on grape
Survey
Approved Method(s)
| Method | Detail | NAPIS Survey Method |
|---|---|---|
| Trap | 22 - Wing Trap Kit, Paper | 3001 - General Trapping Procedure |
| Trap | 27 - Wing Trap Kit, Plastic | 3001 - General Trapping Procedure |
| Trap | 18 - Plastic Bucket Trap | 3001 - General Trapping Procedure |
Trap Spacing:
When trapping for more than one species of moth, separate traps for different moth species by at least 20 meters (65 feet).
Method Notes:
Plastic Bucket Trap Protocol
4/23/18: Mesh screens are now available for purchase through IPHIS survey supply. Product name: Plastic Bucket Traps, Mesh Screen.
Both the wing trap and plastic bucket trap are approved traps for this species.
The wing trap is available in a plastic or paper version; either type may be used for this target.
The Plastic Bucket Trap is also known as the unitrap. The trap has a green canopy, yellow funnel, and white bucket and is used with a dry kill strip. See Brambila et al. (2010) for instructions on using the plastic bucket trap.
4/23/18: Mesh screens are now available for purchase through IPHIS survey supply. Product name: Plastic Bucket Traps, Mesh Screen.
Both the wing trap and plastic bucket trap are approved traps for this species.
The wing trap is available in a plastic or paper version; either type may be used for this target.
The Plastic Bucket Trap is also known as the unitrap. The trap has a green canopy, yellow funnel, and white bucket and is used with a dry kill strip. See Brambila et al. (2010) for instructions on using the plastic bucket trap.
Approved Lure(s)
| NAPIS Code | Product | Dispenser | Effectiveness | Compound(s) | 61 | Cryptoblabes gnidiella Lure | rubber septum | 28 days | Z11-16Ald Z13-18Ald |
|---|
Lure Attachment:
IMPORTANT: Do not include lures for other target species in the trap when surveying for this target.
Survey Recommendations
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.
Key Diagnostic or Identification
Approved Method(s)
ID/Diagnostic:
Morphological. Confirmation of C. gnidiella is by morphological identification. Adults of C. gnidiella are easily confused with many North American species; genitalia must be examined for confirmation. Mature larvae and adults can be identified. A screening aid for CAPS target Pyraloidea (males), including C. gnidiella, can be found in Passoa (2009). A description of this species is found in Neunzig (1986).
Mistaken Identities:
Larvae could be confused with larvae of the carob moth (Ectomyelois ceratoniae). A diagnostic comparison between the two pests can be found in Avidov and Gothilf (1960). Pre-imaginal stages of Lobesia botrana and C. gnidiella can look similar. Tio et al. (1994) give characteristics to distinguish the two larval species.
References
- Avidov, Z. and S. Gothilf. 1960. Observations on the honeydew moth (Cryptoblabes gnidiella Milliere) in Israel. Ktavim, 10:109-124.
- Neunzig, H. H. 1986. The Moths of America North of Mexico. Fascicle 15.2. Pyraloidea, Pyralidae (Part). The Wedge Entomological Research Foundation.
- Solis, M.A. 2006. Key to selected Pyraloidea (Lepidoptera) larvae intercepted at U.S. ports of entry: revision of Pyraloidea in 'Keys to some frequently intercepted lepidopterous larvae' by Weisman 1986. 58 pp.
- Tio, R. del, R. Ocete, and M. E. Ocete. 1994. Practical indications for differentiating preimaginal stages of Lobesia botrana (Denis and Schiffermuller, 1775) (Lepidoptera: Tortricidae) and Cryptoblabes gnidiella (Milliere, 1867) (Lepidoptera: Pyralidae), two vine pests in Jerez, Spain. Sociedad Hispano-Luso-Americana de Lepidopterologia (SHILAP) 22(86):119-125.
If you are unable to find a reference, contact STCAPS@usda.gov. See the CAPS Pest Datasheet for all references.