Conotrachelus retentus Scorecard

Common Name:  black walnut curculio

Scorecard created on
Last Updated on

Results

Impact Total:13 / 35Impact = ( Spread + Damage - Benefit )

Ability to Respond Total:18 / 25Ability to Respond = ( Ease of Response + Tools in Place )

Confidence:Medium

Confidence Notes:

Impact

SpreadNotesScore
Spread RateLarvae of this pest can move within infested nuts, the adults are not very mobile.2
Spread AmountFound in the eastern US from Missouri eastward.5
DamageNotesScore
EcologicalIncreased insecticide usage would result to manage this pest if it established - this would threaten environmental quality; could also impact seed production in walnuts in natural settings.3
AgriculturalReported as a pest of black walnut; other walnut types would also likely be damaged, larvae infest the nuts and cause nut drop.3
Infrastructure0
Cultural0
Health0
BenefitNotesScore
Ecological0
Agricultural0
Infrastructure0
Cultural0
Health0
Total13

Ability to Respond

Ease of ResponseNotesScore
DetectionInspection of nuts is the best way to detect the larvae, adults can be sampled by banding trees and with non-pheromone traps but these methods would only be effective locally; adult feeding and larval infestation leave signs that can be observed.3
ControlWell-timed insecticide applications made to commercial walnuts are commonly used.3
Tools in PlaceNotesScore
EntryA-rated pest from CDFA.5
ControlA-rated pest from CDFA.5
OutreachKnowledge of this pest is high within the potentially affected industry; widespread outreach is lacking.2
Total18