Screening Soybean Genotypes in the Greenhouse for Resistance to Insects

Of seven insect species tested, the corn earworm was the easiest to work with in the greenhouse screening program and required fewer replications than most other species to demonstrate stipulated levels of resistance. For example, a difference of 40% in the overall mean of the experiment between two genotypes required seven replicates with corn earworm and 18 replicates with soybean looper. The greenhouse procedure has been used successfully for 3 yr and is a good complement to field testing in a soybean pest resistance program