Efficacy of lambda-cyhalothrin (Karate Z 2.08 SC) applied at three volumetric application rates and three droplet sizes for control of a natural infestation of heliothine larvae on cotton is discussed. Results generally support the conclusions of bioassays made in 1998 using the same insecticide, droplet sizes and volumetric applications rates. Droplet size did not affect larval numbers. Results pooled across droplet sizes indicated that efficacy tended to decrease as volumetric application rate increased as measured by larval counts and numbers of damaged bolls.