Grass selections including 10 zoysiagrasses, 18 paspalums, 34 Bermuda grasses, tall fescue, creeping red fescue, and perennial ryegrasses with and without endophyte were evaluated for potential resistance to fall armyworm, Spodoptera frugiperda (J. E. Smith), larvae. Laboratory evaluations assessed the degree of antibiosis among >70 grass lines to first-instar fall armyworms. When all parameters measured were considered, the trend in resistance to fall armyworm among endophyte-infected (E ) and endophyte-free (E-) cool season grasses from greatest to least was: ‘Dawson’ E > APR 1234 > ‘Dawson’ E- > ‘Rosalin’ E > Lp 5425, ‘Rosalin’ E-, ATF 480 > ‘Tulsa’ or: E slender creeping red fescue > E turf- type perennial ryegrass > E- slender creeping red fescue > E forage-type perennial ryegrass > E- forage-type perennial ryegrasses, and E tall fescue > E- turf-type tall fescue. Among warm season grasses larval weight gain was reduced on all zoysiagrasses. Larval weight gain also was lower on the Bermuda grasses ‘Tifsport’, ‘Tifgreen’, 97–4, 97–14, 97–22, 97–28, 97–39, 97–40, 97–54, 98–15, 98–30, and 98–45 than when larvae were fed ‘Tulsa’ tall fescue or the diet control. Only APR1234 and ‘Dawson’ creeping red fescue reduced larval survival to the same extent that was observed for zoysiagrasses. Survival on Bermuda grasses was least on 97–8. Seashore paspalums were only rarely less susceptible to fall armyworm than tall fescue, although pupal weights were consistently lower on ‘Temple 1’ and ‘Sea Isle 1’ paspalums than that on ‘Tulsa’ tall fescue. Genetic resistance to key grass pests can reduce insecticide use and simplify management of these cultivars.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 95 • No. 2