There are thousands of rodent species in the world. While they provide a number ecosystem functions, unfortunately, some cause significant damage to agriculture. Rodent occurs crops field, but also stored foods, livestock feed, and structures. many methods available reduce populations and/or damage, including both lethal non-lethal methods. advantages disadvantages most methods, regulated by fe...

We studied by the laboratory tests impact of most widespread pesticides (insecticide “Actor”, fungicide “Scooter”, herbicide “Titus-C”) in different concentrations (0,001–1000 mg/L) and water on main ecotoxicological indexes genetic vicaristic “western” “eastern” allospecies great ramshorn Planorbarius corneus s. lato. It was established, ranges toxic action these pollutants (mg/L) are followin...

Received August 26. 1964 A large number of both spontaneous and induced second chromosome recessive lethals in Drosophila melanogaster have been reported. Almost of all these lethals are rather rapidly eliminated from populations under random mating conditions. IVES (1945) and WALLACE (1950) have estimated the number of second chromosome loci of lethal genes as 495 and 400, respectively. Some l...

freshwater fish cirrhinus mrigala were exposed to lethal concentration (5 mg/l) for 1,2,3,4 days and sublethal concentration (1 mg/l) for 1,7,14,21 days of cypermethrin to examine the enzymes activity, in functionally three different tissues namely, gill, liver and muscle. activities of aspartate aminotransferase (aat), alanine aminotransferase (alat) and glutamate dehydrogenase (gdh) increased...

About 20 years ago Drosophila subobscura, a native Palearctic species, colonized both North and South America. In Palearctic populations lethal genes are not associated in general with particular chromosomal arrangements. In colonizing populations they are not randomly distributed and usually are associated to a different degree with chromosomal arrangements caused by the founder event. The per...

Through examination of all available data on lethal and inversion frequencies on the second chromosome in natural populations of Drosophila melanogaster, we have discovered that there is a clear negative correlation between the two quantities. Lethal genes are located more densely on the regions of standard gene arrangement than the inverted regions, and this accounts for the negative correlati...

INTRODUCTION ..................................................................................... 245 I. BACKGROUND OF PIRACY IN CHINA .................................................. 246 A. Piracy Today and the Increase in Internet Users .................. 246 B. History of Piracy as an Acceptable Practice in Chinese Culture .....................................................................

The keratinophilic soil fungus Chrysosporium tropicum was evaluated as a biological control agent against Anopheles stephensi larvae in the laboratory. Culture filtrates of C. tropicum were found to be toxic to An. stephensi larvae at various concentrations. The ranges of the 50% lethal concentration (LC50) values of fungal filtrates were 16.60-17.78, 12.02-12.88, and 34.67-35.48 microl/ml agai...