Abstract A test was conducted May 2 through May 15 in Roanoke Co, VA, with Larvin 500 to measure the control of alfalfa weevil larva in alfalfa. Furadan 4F was used as a comparison. Applications were made on 200 sq ft plots replicated 4 times using a randomized design. The post-treatment counts were averaged from the 4 replicates. The Larvin 500 was applied at 0.225 lb ai/acre and 0.45 lb ai/acre. The Furadan 4F (4 lb/gal) was applied at 0.5 lb ai/acre. Samples consisted of 25 alfalfa stems collected in a zig-zag pattern across each plot. Larvae were extracted by beating bundles of these stems against the inside of a 5-gal bucket.