Field biology studies of three grain aphids, Macrosiphum
avenae (Fabr.), Acyrthosiphon dirhodum (Walker), and Rhopalosiphum
padi (L.) were conducted near Corvallis, Oregon, from 1961 to
1964.
Populations of M. avenae were found on grain plants, and
alatae entering spring barley may have been from wheat fields. Specimens
were found more...
Statement of the problem:
The study sought to determine whether certain
measurable differences existed between students who had
withdrawn after acceptance into the accelerated mathematics
classes in the Portland schools and students who
had persisted after acceptance into the program. Examined
were: scores on the Iowa Tests of Basic Skills,...
The increasing demand for vocational-technical training at the
community college level stems from four interrelated factors: the
impact of automation and technology, the rapid population increase,
he social awareness of the economic plight of minority groups, and
concern for the non-college-bound high school graduate or drop-out.
As a result, community...
A study of the immature stages of the subfamily Troginae in
North America was conducted from the spring of 1963 through the
spring of 1965, Larvae of Trox and Omorgus were easily reared in
the laboratory, but all attempts to rear the larvae of Glaresis were
unsuccessful,
The suberosus group,...