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United States Department of Agriculture

Agricultural Research Service

Research Project: Genetic Improvement of Maize and Sorghum for Resistance to Biotic Stress

Location: Crop Genetics and Breeding Research

Title: Field evaluation of maize germplasm lines for both whorl- and ear-feeding insect resistance

Authors
item Ni, Xinzhi
item Xu, Wenwei -
item Blanco, Michael
item Williams, William

Submitted to: Entomological Society of America Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: May 27, 2013
Publication Date: N/A

Interpretive Summary: not required

Technical Abstract: A total of 29 Antigo maize germplasm lines from the Germplasm Enhancement of Maize (GEM) Program received from the Texas Agricultural Experiment Station in Lubbock, TX, were examined for whorl-feeding fall armyworm and ear-feeding corn earworm resistance in 2012 and 2013 with four local resistant and susceptible controls. The germplasm lines were evaluated for the fall armyworm resistance using visual damage ratings on 7 and 14-d after the artificial infestation, and predator abundance was also recorded 7-d after the infestation. The corn earworm resistance was evaluated using the manual infestation, and evaluated with cob damage, husk tightness and extension. The other ear-feeding insect damage (e.g., sap beetles and pink scavenger caterpillar) with natural infestations was also recorded and compared. These newly-identified lines with foliar- and/or ear-feeding insect resistance will be used for new germplasm development in the corn breeding program. KEY WORDS: fall armyworm, corn earworm, husk tightness and extension, sap beetles, and pink scavenger caterpillar

Last Modified: 7/31/2014
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