The European corn borer, Ostrinia nubilalis (Hübner), is an important insect pest of corn, Zea mays L., crop in Moghan region. In field experiments, the density of eggs and larvae of O.nubilalis and percentage of eggs and larvae parasitisms were studied on four corn hybrids NS704 (commercial cultivar), NS770, NS640 and MV524 (cultivars with high yield). Furthermore, i...

The European corn borer, Ostrinia nubilalis (Hübner), is an important insect pest of corn, Zea mays L., crop in Moghan region. In field experiments, the density of eggs and larvae of O.nubilalis and percentage of eggs and larvae parasitisms were studied on four corn hybrids NS704 (commercial cultivar), NS770, NS640 and MV524 (cultivars with high yield). Furthermore, i...

Eggs from an ebony stock exposed to 5-5 degrees C prior to syngamy exhibited increased production of genetic mosaics in comparison with untreated eggs from the same females. No increase in mosaic production occurred for cold-shocked cleavage-stage embryos from the ebony stock or from pre-cleavage cold-shocked eggs from a wild-type stock. Heat shock of pre-syngamy eggs also failed to increase th...

Goldschmidt, R. B., "Position Effect and the Theory of the Corpuscular Gene," Experientia, 2, 1-40 (1945). Green, M. M., and Green, K. C., "Crossing Over Between Alleles at the Lozenge Locus in Drosophila Melanogaster," PROC. NATL. AcAD. Sci., 35, 586-591 (1949). Komai, T., and Takaku, T., "A Study on the Closely Linked Genes, Miniature and Dusky in Drosophila Virilis, with Some Considerations ...

H E PARASITIC wasp, Habrobracon, has been considered of special T value in connection with studies of dominant lethals because of its somewhat exceptional method of breeding. In “out-crosses,” now called three-allele crosses because they involve triple alleles a t the sex locus, all fertilized eggs develop into females, unfertilized ones into males (WHITING 1937a, 1940, 1943). It follows, then,...