title: Insecticide Efficacy and Timing for Control of  Western Bean Cutworm (Lepidoptera: Noctuidae) in  Dry and Snap Beans.
abstract: The western bean cutworm, Striacosta albicosta (Smith) (Lepidoptera: Noctuidae), is a recent pest of corn, dry,and snap beans, in the Great Lakes region, and best practices for its management in beans need to be established.Insecticide efficacy and application timing field studies, conducted in 2011–2013, determined that lambda-cyhalothrin and chlorantraniliprole were capable of reducing western bean cutworm feeding damage in dry beans from 2.3 to 0.4% in preharvest samples, and in snap beans from 4.8 to 0.1% of marketable pods, respectively. The best application timing in dry beans was determined to be 4–18 d after 50% egg hatch. No economic benefit was found when products were applied to dry beans, and despite high artificial inoculation rates, damage to marketable yield was relatively low. Thiamethoxam, methoxyfenozide, and spinetoram were also found to be effective at reducing western bean cutworm damage in dry bean to as low as 0.3% compared to an untreated control with 2.5% damaged pods. In snap beans, increased return on investment between CAD$400 and CAD$600 was seen with multiple applications of lambda-cyhalothrin, and with chlorantraniliprole applied 4 d after egg mass infestation.
authors.forename: L A
authors.initials: LA
authors.lastname: Goudis
authors.forename: C L
authors.initials: CL
authors.lastname: Trueman
authors.forename: T S
authors.initials: TS
authors.lastname: Baute
authors.forename: R H
authors.initials: RH
authors.lastname: Hallett
authors.forename: C L
authors.initials: CL
authors.lastname: Gillard
mesh_terms: D000818:Animals; D006114:Great Lakes Region; D007300:Insect Control; D007306:Insecticides; D007814:Larva; D009036:Moths / Q000254:growth & development; D009570:Nitriles; D027805:Phaseolus / Q000502:physiology; D011722:Pyrethrins; D062367:ortho-Aminobenzoates
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; D062367:ortho-Aminobenzoates; C517733:chlorantranilipole; C037304:cyhalothrin