ASSESMENT OF SEXUAL AND REPRODUCTIVE CORRELATION IN THE SEASONAL DYNAMICS OF THE AGROTIS SEGETUM POPULATION AT IMAGO STAGE
TUDOR NASTAS, IULIANA RUSU Institute of Genetics, Physiology and Plant Protection, PÄdurii Str., 20, ChiĆinÄu, Republic of Moldova, e-mail: tudor_nastas@mail.ru
During seasonal activity A. Segetum has been shown to evolve over three generations. The development of the first generation was noted during the first decade of May and the second decade of June. The development of the second and third generations was established between the first decade of July and the second decade of September. The assessment of the sexual correlation of imago Agrotis segetum during crop growing, showed the ratio of males to females is 1,3 : 0,8. The Agrotis segetum phytophagus has been shown that the present climate of the Republic of Moldova, increased aggressiveness on crops, and the number of eggs in the egg tubes of the females does not depend on the number of copulatory acts (estimated by the number of spermatophores in the copulatory bags of females). Analysis of the females showed that the copulative bags contained between 1 and 6 sperm, which means that they were paired with the males up to six times. Females with 2 pairs (30%) and 3 pairs (23%), representing 53% of the total number of captured females.
