Insect Control in Early Snap Beans, 1983

Experimental and registered insecticides were evaluated for efficacy against snap bean insects at the Tobacco Experiment Station, Greeneville, Tenn. Snap beans were planted in 38-in rows on 26 May. Plots were four rows by 20 ft with one untreated row between plots. Treatments were replicated five times in a randomized complete block design. Insecticides were applied 8 July using a 2-gal compressed-air handsprayer at 50-gal/acre spray. One treated row per plot was sampled by taking five sweeps along the row with a 15-in. diameter insect net. Pretreatment means were: leafhoppers (LH) 14.75, Mexican bean beetle larvae (MBBL) 2.5, and adults (MBB) 0.17. A different row was sampled on each date to reduce plant damage. Three row feet were hand harvested from the second treated row on 2 2 July.