Mo. 
Nebr. 
Nebr. 
= 3S 
A Study of Methods of Estimating Insect Abundance and 
Relating Population Density to Insect Damage. fo(i) review and 
evaluate the methods now used to estimate insect population 
numbers 3 (2) study the comparative effectiveness of methods 
under a variety of environmental conditions; (3) determine 
effect of population size on efficiency of various methods; 
and (4) evaluate the use of one or more sampling techniques 
in a study of population fluctuations of different types of 
insects over a sufficiently long period of time. 
Ent., Econ. Zool. 1721 
Investigations and Control of the Codling Moth and Other 
Fruit _and Vegetable Insects. To @) develop more efficient 
spray program for control of insects and mites attacking tree 
fruits; (2) develop effective program to control insects and 
mites attacking small fruits; (3) study biology of arthropod 
pests of vegetable crops and develop better methods for their 
control; (4) study residues of chemicals applied to fruits and 
vegetables under field and laboratory ccnditions. 
Ent. 31 
Further Studies on the Influence of the Different Elements 
and Plant Nutrients on the Well-Being and Fecundity of the House 
Cricket and Other insects. To determine effect varying amounts of 
different soil minerals, minor elements and other nutrients, as 
laid down in plants, may have on rate of growth, longevity and re- 
productive potential of the house cricket and other insects when 
fed upon growing plants or parts of plants. 
Ent. 74 
The Effects of Visible Spectrum Irradiation on Growth and 
Development in Several Species of Insects. (1) Measure effects of 
exposure by irradiation of delimited areas of the visible spectrum 
to German cockroach, common milkweed bug, and other selected in- 
sects; (2) Learn location of "receptor sites" within insect which 
are most probably altered as a result of irradiation; 
(3) Identify particular hormone(s) involved and learn changes 
resulting from visible spectrum irradiation. 
Ent. 569 
Physiological Effects of 2 to 40 Megacycle Radio-Frequency 
Electric Fields on Insects. Learn (1) internal temperatures with- 
in different areas of several species of insects immediately follow- 
ing exposure to high-frequency electric fields; (2) water loss in 
several species resulting from exposure to high-frequency electric 
fields and learn nature or source of loss; (3) possible damage to 
nerve tissue, especially the brain and ventral nerve cord, which 
may result from exposure to high-frequency electric fields. 
Ent. 578 Coope ARS 
