Articles
RESISTANCE TO FALL ARMYWORM (SPODOPTERA FRUGIPERDA) AMONG KENTUCKY BLUEGRASS (POA PRATENSIS) CULTIVARS
Article number
661_71
Pages
525 – 530
Language
English
Abstract
The fall armyworm, [Spodoptera frugiperda (J.E. Smith)] (Lepidoptera: Noctuidae), is a destructive pest of many species of cool- and warm-season turfgrass in the Americas and Caribbean Basin.
Forty-seven cultivars and genotypes of Kentucky bluegrass, (Poa pratensis L.), were characterized for their resistance or susceptibility to fall armyworm larvae in no-choice experiments.
The majority of the Kentucky bluegrasses (32 genotypes) provided 100% mortality before adult emergence.
An additional seven cultivars provided >90% mortality and two more produced >80% mortality.
The most susceptible cultivars were Glade with 8.33% mortality, followed by PTDF22B2 (25%), Kenblue (29%), Connie (58%) and H86-386 (67%). Poa arachnifera x P. pratensis Reveille was 100% resistant, characteristic of the parent, P. pratensis Huntsville, as opposed to the parent, P. arachnifera Syn-1. Overall analysis of the group of Kentucky bluegrass genotypes shows a gradation of resistance, with Wabash killing 100% of larvae within 3 d feeding, an additional nine cultivars killing 100% within 9 d, 20 additional cultivars killing 100% by pupation and two additional cultivars provided 100% kill by adult emergence.
The data indicates Walbash, Adelphi, Eagelton and Monopoly (all producing &gr; 92% mortality within 3 d feeding) present the greatest potential for transferring genetic resistance for the fall armyworm. Poa trivialis Laser (33% mortality at adult emergence) was included as a susceptible standard.
Forty-seven cultivars and genotypes of Kentucky bluegrass, (Poa pratensis L.), were characterized for their resistance or susceptibility to fall armyworm larvae in no-choice experiments.
The majority of the Kentucky bluegrasses (32 genotypes) provided 100% mortality before adult emergence.
An additional seven cultivars provided >90% mortality and two more produced >80% mortality.
The most susceptible cultivars were Glade with 8.33% mortality, followed by PTDF22B2 (25%), Kenblue (29%), Connie (58%) and H86-386 (67%). Poa arachnifera x P. pratensis Reveille was 100% resistant, characteristic of the parent, P. pratensis Huntsville, as opposed to the parent, P. arachnifera Syn-1. Overall analysis of the group of Kentucky bluegrass genotypes shows a gradation of resistance, with Wabash killing 100% of larvae within 3 d feeding, an additional nine cultivars killing 100% within 9 d, 20 additional cultivars killing 100% by pupation and two additional cultivars provided 100% kill by adult emergence.
The data indicates Walbash, Adelphi, Eagelton and Monopoly (all producing &gr; 92% mortality within 3 d feeding) present the greatest potential for transferring genetic resistance for the fall armyworm. Poa trivialis Laser (33% mortality at adult emergence) was included as a susceptible standard.
Authors
J.A. Reinart, J.C. Read, R. Meyers
Keywords
Host plant resistance, insect resistance, integrated pest management, turfgrass
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