ze Yi9r 
Texe Effects of Insecticides on Plants and Soils. To determine 
the effects of organic insecticides on plants and soils. 
Ent. 946 (S-22) Coop. ARS 
Utah The Effects of Residues of Newer Insecticides on Health. 
To determine (1) under controlled conditions if insecticide 
residues appear in human foods of animal origin in toxic 
quantities, when farm animals consume feeds containing resi- 
dues of Endrin, Heptachlor and other new insecticides; (2) 
effects of residues on calves fed milk from cows which have 
been fed insecticide hay, and when fed known amounts of 
insecticides mixed with feed; and (3) histological changes 
in tissues of various species of animal when fed different 
insecticides. 
Anim. Husb., Chem., Dairy Indus., Vet. Sci., Zool., 
Ent. 424 Coop. HEW-Natl. Inst. Health 
Utah Insect Activity in Relation to Fluoride Content of Plants. 
(1) Survey areas of fluoride injury to plants for purpose of: 
learning role of insects in injury of plants, studying insect 
populations and species on plants injured by fluorine. (2) 
By greenhouse experiments learn if fluoride level of plant 
has any direct effect on activity of insects associated with 
plant under study. 
Entepihls Paths, sBot e462 
Va. The Genetics of Resistance to Insecticides in the German 
Cockroach. To (1) determine if factors for resistance to 
chlordane in German Cockroach are a. simple or complex, b. 
associated with sex chromosomes, carried mainly on autosomal 
chromosomes, transmitted thru cytoplasm, or by a combination; 
(2) determine if resistance development means selection of 
predominately homozygotes or heterozygotes for loci concerned, 
and (3) extend existing knowledge on DDT resistance in relation 
to outline for chlordane study. 
Ent. 86040 
Va. Comparisons of Resistant and Non-Resistant Strains in Two 
Insect Species. To (1) increase magnitude of resistance to 
insecticides in selected strains of the German cockroach; (2) 
compare resistant and non-resistant strains of this cockroach 
for a. length of time in egg stage, b. length of nymphal period, 
ce longevity of adults, d. reproductive response of females and 
e. distinguishing morphological characters; (3) continue develop- 
ment of insecticidally selected strains of large milkweed bug; 
(4) compare selected and unselected strains of large milkweed 
bug for a. number of eggs produced, b. order of resistance to 
insecticides, c. deleterious effects from exposure to insecticides. 
Ent. 86059 
