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ARS Home » Plains Area » Brookings, South Dakota » Integrated Cropping Systems Research » Research » Publications at this Location » Publication #284700
Title: SOYBEAN.DEFOLIATION.2.SD.2011

Author
item Hesler, Louis

Submitted to: Germplasm Resources Information Network (GRIN)
Publication Type: Other
Publication Acceptance Date: 9/25/2012
Publication Date: 9/25/2012
Citation: Hesler, L.S. 2012. SOYBEAN.DEFOLIATION.2.SD.2011. USDA-ARS Germplasm Resources Information Network (GRIN). Available: www.ars-grin.gov/npgs/.

Interpretive Summary: Various chewing insects feed upon soybean plants, and their infestations may be economically significant in some years in the north-central United States. Soybean lines that are resistant to defoliation may be useful in managing chewing insect pests. Levels of defoliation from chewing insects were characterized among 11 soybean lines near Brookings, South Dakota, in 2010. Soybean plants incurred defoliation mainly during mid- to late season from natural infestations of chewing insects, including green cloverworms, soybean loopers, and grasshoppers, and to a minor extent from bean leaf beetles. Test lines were evaluated using a rating scale that ranged from 1 (light defolatiion) to 3 (severe defoliation). Plants were evluated on 19 Aug by consensus rating of two persons. Lines PI 227687, PI 548654 and KS4202 had average ratings of 1, and PI 548374 had an average rating of 1.33. Other lines had ratings of 2 or greater.

Technical Abstract: Several types of chewing insects feed upon soybean plants, and their infestations may be economically significant in some years in the north-central United States. Soybean lines that are resistant to defoliation may be useful in the management of chewing insect pests. Levels of defoliation from chewing insects were characterized among 11 soybean lines near Brookings, SD, in 2010. Soybean plants incurred defoliation mainly during mid- to late season from natural infestations of chewing insects, including green cloverworms, soybean loopers, and grasshoppers, and to a minor extent from bean leaf beetles. Test lines were evaluated using a rating scale that ranged from 1 (light defolatiion) to 3 (severe defoliation). Plants were evluated on 19 Aug by consensus rating of two persons. Lines PI 227687, PI 548654 and KS4202 had average ratings of 1, and PI 548374 had an average rating of 1.33. Other lines had ratings of 2 or greater.