Study of effect of the variety and ecological facterson and distribution of the diferent life stages of olive pssylla,Euphyllura olivine costa, in Qunietra-Kan Aarnba
2011
Sperij, M. | Aslan, L. | Qasis, W.
The spread and distribution of Euphyllura olivine stages in Daraa were studied on five olive varieties: Frountoyo italic , Qaysi , Sorani , Dan , and Khudyri during the 2008-2009 seasons. The obtained Results showed that the insect overwintering as adult, which resume its activity when the temperature raised up to 15-11°C, after that the insect started to lay eggs on the new twigs at the early March with the appearance of flowers as the insect put their eggs at the base of flower. When the temperature arise above 20°C, the females stop laying eggs and adult enter into aestivation state The highest level of egg laying and the individuals of first nymphal instar and adult were recorded at 15-11 °C and RH 61-70%,on the other hand and the third and fourth and fifth nymphal instar and the fifth instar at 21-25°C and RH, 41-50%. Two generation were recorded in this investigation as they appear in Spring time, While the Autumn generation did not appear and that was in contrary with the literatures. The susceptibility of olive varieties varied among olive varieties with the highest level of infection with variety (qaysi) 18,59%, then sorani l2,72%, dan 9,26%, kudayri 8,80%, and the lowest infestation with the variety (frontoyo italic)7,67% .
Mostrar más [+] Menos [-]Palabras clave de AGROVOC
Información bibliográfica
Este registro bibliográfico ha sido proporcionado por Ain Shams University