Duration of development, survival, and fecundity of Coccinella septempunctata l. (Coleoptera, Coccinellidae) at artifi cial cultivation on diff erent fodder mixes

Miniyarov F. T., Pavlov S. I., Yaitsky A. S.

For artificial cultivation of C. septempunctata (Coleoptera, Coccinellidae), two feed mixtures with control from natural food (Macrosiphum rosae L. (Hemiptera, Aphididae)) were used. A statistical analysis of the experimental results showed that the composition of the feed significantly affected the survival of C. septempunctata only upon transition to the stage of 1st instar larvae, pupae and adults, and on the developmental duration at all stages of the life cycle. According to the results of the study, it was found that when using feed from aphids, coccinellids at each stage of growing (from eggs to adults) showed a survival rate of over 92% (total 72%), rapid development (about 26 days) and high female productivity (average 34 eggs almost every 3 days). Statistically similar biological parameters were found in females of a seven-spotted ladybird, feeding on a feed mixture based on decapsulated eggs of Artemia salina L. (Anostraca, Artemiidae). The results of the cultivation of C. septempunctata in this feed mixture at the pre-imaginal stages showed a survival rate of over 80% (total 43%) and developmental duration of about 32 days. Adult C. septempunctata beetles grown on a feed based on pork liver had an overall survival rate of 27% and lack of fertility. Thus, for the successful cultivation of coccinellids, it is necessary to include in the composition of the feed ingredients consisting of arthropods as a basis or additive, which will allow obtaining similar biological indicators of coccinellids eating natural food.

Keywords:coccinellids; larva; Coccinella septempunctata; imago; insectarium; Artemia salina; life cycle; Macrosiphum rosae; survival; fertility; aphids; pupa; pork liver; egg-laying; developmental duration; fodder mixture