The transition process from the Soviet economical system to the market economy in fisheries has received
relatively little attention from fisheries researchers. This study analyze how overall changes in political and economical life
of Estonia during the last decade have affected the complex system of the environmental, economic, social and...
The toxicity of chlorobenzene (CB) was investigated in rainbow
trout following acute ip administration (1. 0 ml/kg, 1:1 in corn oil)
and chronic exposure (2. 1 ppm and 2. 9 ppm) via the water in a continuously
flowing system for 15 and 30 days.
In the acute study, overt toxicity...
The relative accuracy of solutions to chaotic systems was examined using the Lorenz
system as a case study. The classical fourth order Runge-Kutta method was employed to
generate solutions using various step sizes, and the resultant solutions were compared. A
second set of solutions was then computed using one of...
Barley yellow dwarf (BYD) is a damaging luteovirus disease responsible for reduced tillering, delayed heading, sterility, and stunting in many cereals worldwide. Well-characterized resistance genes to barley yellow dwarf viruses (BYDV) are scarce and genes conferring tolerance to BYDV are limited in wheat. In an attempt to generate plants with...
Agrobacterium tumefaciens is a plant pathogenic bacteria which incites
crown gall tumors. Although virulence has been associated with a
97-156 Mdalton "tumor-inducing" (Ti) plasmid, few potential plasmid gene
products have been identified. The objective of this study was to
identify plasmid-coded gene products through a comparison of protein
fingerprints of...
The Pacific Northwest has become one of the nation’s premier sweet cherry,
Prunus avium, production areas. As production of sweet cherries has flourished in
Oregon and Washington, so has powdery mildew, caused by the fungus
Podosphaera clandestina, which infects both foliage and fruit causing severe
economic damage to growers. Sweet...
Phytophthora vignae, causal agent of stem and root
rot of cowpea (Vigna unguiculata), was reported for the
first time in Sri Lanka. The pathogen was found in cowpea
field soils from 3 of 5 geographic regions sampled. Only
one site however, had plants exhibiting disease symptoms.
Of the eight cowpea...
Pallidosis is a disease of strawberry identified in 1957 with an unknown etiology. Two previously uncharacterized viruses in strawberry, Strawberry pallidosis associated virus (SPaV) and Beet pseudo-yellows virus (BPYV), have been found associated with disease symptoms. The complete nucleotide sequence of both viruses was determined and molecular detection protocols developed....
Fusarium spp. are among the most important pathogens of Douglas-fir
(Pseudotsuga menziesii) seedlings in bareroot nurseries. Currently the most effective
disease control method is soil fumigation with methyl bromide. As methyl bromide is
phased out, however, other disease management strategies may become more important.
We explored two alternative approaches to...