Antibiosis in Soybean Breeding Lines for the Management of Corn Earworm for Sustainable Soybean Production
2007
Dadson, R.B. | Javaid, I. | Hashem, F.M. | Joshi, J.M.
Corn earworm (Helicoverpa zea Boddie), is one of the major insect pests of soybean in many soybean growing areas. A study was conducted during three soybean growing seasons to evaluate the antibiosis type of resistance in soybean breeding lines which were grown in replicated field trials. A plant introduction, 'PI 229358', with a known antibiosis type of resistance against corn earworm was included as a resistant check and four commercial varieties including Hutcheson, Stalwart, Charleston and Croton also were included in the experiments for comparison. The results of antibiosis tests showed that some breeding lines such as 'E3582019' and 'D6874003' provided level of antibiosis to corn earworm comparable to that found in the commercial variety Stalwart. Also, 'M3583009' and 'D358B3010' provided antibiosis to corn earworm which was similar to a commercial variety, Stalwart. However, none of the breeding lines provided the resistance which was similar to 'PI 229358'. The intermediate antibiosis found in some of the breeding lines could play an important role in the management of corn earworm and other insect pests coupled with other desirable agronomic traits such as higher seed yield.
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