• Sundaram, K.M.S.
  Chemical Accountability Project, Canadian Forestry Service
  
• Sundaram, A.
  Pesticide Formulations, Canadian Forestry Service
  
• Nott, R.
  Chemical Accountability Project, Canadian Forestry Service
  

Mexacarbate deposits on simulated and live balsam fir needles were measured at different crown heights using aluminum coils as the simulated foliar surface, following aerial application of two spray formulations (one oil based and one water-based) in New Brunswick, Canada. Ground deposits and air concentrations of the material were also measured by using Kromejote card-glass plate units and impingers respectively. Deposits on the aluminum coils and foliar concentrations decreased from the top to the middle, and to the bottom levels in the ratio of 3:1:1. Regression analysis showed an approximately linear relationship between the deposits on the two surfaces. Correlation was good between mean deposits at the tree crown level and those on the ground samplers. the air concentrations shower a poor correlations with the rest of the deposit data, probably due to the trapping of both droplets and vapor, whereas the other samplers collected only the droplets.