A study of some important biological parameters of Coccinella septempunctata L (Coleoptera : Coccinellidae) and its predation efficiency against Aphis fabae(Homoptera :Aphididae)

This study was conducted on predator Coccinella septempunctata at laboratory conditions , under average of temperature 20± 2Cº. Results confirmed: Average of life cycle time was :27.3±4.1 days ( egg development time 6.5±0.5 , larvae 13.2±0.5 , pupa 7.5±0.5 days).Also the study of predation efficiency showed that the average number of aphids consumed by each of the four instars larvae were (57.9±10.6 , 63.7±9.4 , 66.5±8.3 , and 348±43.4) respectively. Therefore the fourth larva instar seemed more predation efficiency, as compared to other three instars ,it consumed double that the three instars consumed, but adult consumed 121±4.5 number of aphids in one day.

Identification of some species of aphids deployed in bean fields and citrus orchards in Latakia and the possibility of its transfer of local isolate of Cucumber mosaic virus

The research aims to Identify some species of aphids on plant families, and test the possibility of transfer to the local isolate of Cucumber mosaic virus. Two species of aphids in bean fields and citrus orchards have been defined, namely: Black bean aphid Aphis fabae and Cotton aphid Aphis gossypii, respectively, depending on the specialized classification keys. The infection proved vital feedback and testing the function using plants: Nicotiana tabacum and Chenopodium quinoa transfer each of the A. fabae and A. gossypii local isolate of Cucumber mosaic virus.