Wash. 
Wash. 
Wash. 
Wis. 
Wis. 
Wis. 
a 
Investigation of Insecticide Residues with Radioactive 
Tracers. To determine persistence, penetration, and transloca- 
tion of insecticide deposits on plants by means of radioactive 
tracers, chemical analysis and bio-~analysis. 
Ent., Agr. Chem. 1109 
Determination of the Persistence of Pesticide Residues. To 
learn (1) persistence of pesticide residues on agricultural crops; 
(2) if levels of pesticide necessary for control are consistent 
with safe concentrations at time of harvest. 
Ent., Agr. Chem. 1332 
Extraction Procedures for Analysis of Demeton (Systox) 
Insecticidal Residues. Develop a procedure for quantitative 
recovery of Demeton residues. 
Agr. Chem. 1334 (W-45) 
Fundamental Problems Associated with the Accumulation of 
Pesticidal Chemicals in Soils. To determine magnitude of insecti- 
cidal accumulation in midwestern soils, rate and reasons for 
disappearance of typical insecticides from various soil types 
and effect of soil-borne insecticides on soil flora and non- 
insect fauna. 
Ent. 897 (NC-19) 
Interrelationships Between Soil Insecticides and Soil Micro- 
organisms. Study selected insecticides, emphasizing some of the 
more common chlorinated hydrocarbon compounds, to learn their 
effects on normal, and abnormal, and residual amounts on popula— 
tion changes of major groups of microorganisms; micro-biological 
processes fundamental to plant growth (ammonification, nitri- 
fication, carbon dioxide evolution, organic matter decomposition 
mechanisms, nitrogen fixation, etc.); alteration of microbial 
soil properties; the feasibility of devising a microbiological 
assay test comparable to those used in the bioassay of vitamins 
and similar compounds. Throughout the study, focus attention on 
role of various soil types and other chemical and physical factors 
appearing worthy of attention. 
Bact. 897a (NC-19) 
Chemical Nature and Mechanism of Loss of Insecticide Residues 
on or in Food, Feed and Forage Crops. Study chemical nature of 
the insecticide degradation products in and on plants and evaluate 
their toxicological hazard. 
Ent. 980 (NC-33) 
