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Inheritance of Reaction to Toxaphene in Oats¹

The reaction of oats (Avena spp.) to toxaphene insecticide spray was found to be controlled by a single major gene, with susceptibility conditioned by the dominant allele. The effect of toxaphene appeared to be localized, and caused discoloration and eventual death of leaf tissue contacted by spray material. New growth appeared normal. The toxaphene chemical and not the solvent carrier appeared to cause the damage.

Key Words: Avena genetics • Chlorinated hydrocarbon Insecticide • Differential phytotoxic reaction

² Assistant Professor, Texas A&M University Agricultural Research Station at Denton, and Assistant Professor, Department of Soil and Crop Sciences, Texas A&M University, College Station, Texas.

Received for publication December 12, 1969.