Resistance of corn strains to the leaf aphid, Aphis maidis fitch

Snelling, R.O.; Blanchard, R.A.; Bigger, J.H.

Resistance of corn strains to the leaf aphid, Aphis maidis fitch

1940

Snelling, R.O. | Blanchard, R.A. | Bigger, J.H.

Data presented here indicate the possibility of reducing injury caused by Aphis maidis through the use of host resistance. The corn-leaf aphid is an especially serious problem in the production of certain foundation seed stocks which are for use in the production of commercial hybrid seed corn. The infestation was determined by an examination of recently emerged tassels for the presence of aphids. Although the severity of the infestations was measured by classifying all infested plants in one of three infestation classes, in general the total percentage of infestation was considered as a reliable indicator of relative resistance or susceptibility. Data are presented from many yellow and white inbred lines as well as from a sufficient number of single crosses to indicate that resistance to this insect is a heritable character.

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