New guinea sugarcane weevil - Rhabdoscelus obscurus
Effective: April 2, 2013
Resources:
Pest Tracker
CAPS Pest Datasheet
Screening Aids:
| Rhabdoscelus obscurus - Sugar Cane Weevil Screening Aid |
Taxonomic Position:
Coleoptera : Curculionidae
Pest Type:
Insects
Pest Code (NAPIS):
INASDHA
This pest is a member of the following lists:
| Palm |
|---|
These Approved Methods are appropriate for:
2023, 2022, 2021, 2020, 2019, 2018, 2017, 2016, 2015
Major Hosts identified in the Host Matrix:
Sugarcane
This list includes important economic or environmental hosts but does not represent all major hosts of the pest. Check CAPS pest datasheet for complete list of hosts.
This list includes important economic or environmental hosts but does not represent all major hosts of the pest. Check CAPS pest datasheet for complete list of hosts.
Human and Animal Pathogens Transmitted:
Not known to transmit any human or animal pathogens.
Plant Pathogens and Organisms Vectored:
Not known to vector any pathogens or other associated organisms but damage may lead to invasion by secondary pests.
Survey
Approved Method(s):
| Method | Product Name / Instructions | NAPIS Survey Method |
|---|---|---|
| Trap |
26 - Palm Weevil Bucket Trap |
3001 - General Trapping Procedure |
| Trap |
23 - Homemade 5-Gallon Bucket Trap |
3001 - General Trapping Procedure |
| Visual | See the CPHST pest datasheet for detailed survey instructions. |
3031 - General Visual Observation |
Method Notes:
Visual surveys may be used to detect larval populations before adults emerge. A trap and lure combination may be used to detect adult populations. See the CPHST Pest Datasheet for survey instructions. See USDA (2010) for instructions on making a Home-made 5 gallon bucket trap.
Approved Lure(s):
| NAPIS Code | Product Name | Dispenser | Effectiveness | Compound(s) |
|---|---|---|---|---|
| 107 | Rhabdoscelus obscurus Aggregation Lure | polysleeve | 42 days |
2-methyl-4-octanol |
| Palm Weevil Lure, Ethyl Acetate | polysleeve | 42 days |
ethyl acetate |
|
| Food bait (Rhabdoscelus obscurus) | N/A | 7 days |
split sugarcane |
Lure Notes:
Do not include lures for other palm pests in the same trap when trapping for R. obscurus.
Identification
Approved Method(s):
ID/Diagnostic: Morphological
Morphological. The genus Rhabdoscelus can be identified through morphological characteristics. Key characteristics include: mesocoxae separated by more than the width of a mesocoxa, spotted or blotched elytra, pile raised in irregular vittae and pustules, and moderately large elytral strial punctures (Zimmerman, 1993).
Brodel (2013a) provides important morphological characters of Dryophthoridae, showing how to differentiate this family from Curculionidae.
A Dryophthoridae key by Zimmerman (1968) as modified by C. F. Brodel (2013) is found in Brodel (2013b).
A key to domestic and PPQ-intercepted genera of Dryophthorinae can be found in Brodel (2002). This key includes several genera of importance, including Metamasius, Rhabdoscelus, and Rhynchophorus.
Mistaken Identities:
Rhabdoscelus obscurus resembles in shape, size, and coloration other sugarcane- and palm-attacking dryophthorid weevils distributed throughout the Americas and Southeast Asia. See the CPHST Pest Datasheet for a detailed list.
References
- Brodel, C.F. 2002. A key to domestic and PPQ-intercepted genera of Dryophthorinae (Coleoptera: Curculionidae). USDA-APHIS-PPQ, Miami, FL. 6 pp.
- Brodel, C.F. 2013a. Important morphological characters of Dryophthoridae. USDA-APHIS-PPQ. 1 p.
- Brodel, C.F. 2013b. Dryophthoridae key by Zimmerman (1968) as Modified by C. F. Brodel (2013).
- USDA-APHIS-PPQ-EDP. 2010. New Pest Response Guidelines: Red Palm Weevil, Rhynchophorus ferrugineus.Riverdale, Maryland.