A study has been done on eriophyids (Eriophyoidea), especially in Yugoslavia, and on the taxonomy of this group of animals. On the basis of an extensive research of literature, consise, up-to-date ...discoveries were given, about fundamental sciences of eriophyids: classification and nomenclature, phylogeny and evolution, morphological characteristics, life cycle and economic importance. Work methods are then described; test material is given, along with suggested solutions for eriophyid classification.
Feeding behavior of the corn earworm, Heliothis zea (Boddie), was studied by administering known quantities of sugar solutions (0, 6.25, 12.5, 25, and 50%) to restrained, unmated moths. Feeding rates ...decreased over time, within a feeding bout (for concentrations less than or equal to 12.5%) and from day to day. The rate of volume intake reached a maximum at 12.5%, although the rate of sucrose intake peaked at 50%. The kind of sugar (sucrose, fructose, or glucose) did not significantly affect feeding rate. At concentrations of 12.5 to 50%, moths ingested more solution on the first day after emergence than on subsequent days; distilled water was taken only in minute quantities on the first day. A curvilinear relationship existed between sucrose intake and both fecundity and longevity. Sugar type did not significantly affect fecundity or longevity.
A study of chemical composition and organic matter digestibility of cattle diets was conducted on semidesert grassland in southern New Mexico during different seasons. Forage quality was highest in ...the spring. Fall diets were lower in digestibility, contained less crude protein and the least estimated digestible energy. Level of protein in fall diets was greater than requirements for dry cows but was less than recommended levels for lactating cows or growing calves. A stepwise regression equation showed that protein accounted for more variation in in vitro digestibility than did other components.
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