Introduction of lady beetle Oenopia conglobata (L.) as predator of ulmus aphid Tinocallis saltans Nevsky in Guilan province and biology of ladybeetle in laboratory conditions.

The predation activity of larvae and adult of Oenopia conglobata (L.، 1758) as a predator of aphids and psyllids of forest، fruit and crop plants has been reported from the most regions of Iran. In order to determine the biology of this lady beetle on ulmus aphid Tinocallis saltans Nevsky،1929 in Laboratory conditions، different developmental stages from the first reared generations selected and were separately kept in Petri dishes. Egg incubation، larval، prepupa and pupa developmental periods and feeding rate were daily registered. Six pairs of lady beetle were selected for determining rate of egg oviposition، pattern of oviposition and adult feeding rate from this aphid. These insects reared in the growth chamber. All of the experiments were preformed under temperature 25، with RH 65± 5، 14/10 h (L. D) periods with feeding upon ulmus aphid. The results of the experiment showed that mean of developmental periods from egg to adult emergence were 2. 4±0. 03، 2. 13±0. 02، 2. 13±0. 02، 1. 93±0. 01، 4. 33±0. 03، 1 & 4. 33±0. 03 days. Mean of dailly oviposition and total of egg laying female adult were 30. 28± 0. 84 & 1854. 17±92. 31 numbers. Means of daily feeding for 1-4 larvae instars and female adults were 12. 31±0. 69، 24. 46±0. 41، 44. 53±0. 67، 62. 02±0. 8 and 40. 16±0. 4 number