Evaluation location: Idaho, United States
Fifty 50 cages of leafhoppers were maintained through the winter and used to increase cages this in the spring. All 500 cages were increased by May 6. The field had been in grain in 2003, and soil was sampled the middle of March and 40 Ibs of 11 52 0 per acre was applied. Telone was applied to both fields on May 3; the field was disked to seal the soil after the application and bedded the middle of May. The field was planted June 7 and finished June 8. There were two row plots 13 feet long. Plots were replicated twice. Seed emerged well except for the US 41 control. Monohikari was used as a control in place of US 33. Five foot alleyways were cut in the field June 28 29, it was cultivated on June 30 and thinned and weeded July 2 7. Leaf hopper were put of viruliferous plants and July 8. Leafhoppers were released on the field July 15 at 1.0 leafhopper per plant. Leafhoppers were spread by going over the field dragging a trap four times a day for one week. The field was weeded July 21 26 and cultivated July 27. The leafhoppers were sprayed and killed on August 4. Plots were visually evaluated and rated on a Disease Index (DI) scale of 0 to 9 (no symptoms to dead) A third and most severe rating was taken on September 13 and showed more separation than in the first and second ratings. Data are from this last rating