view:17384 Last Update: 2018-2-6
Nazari, P., Rahmani, H., Kavousi, A., Soleimani, A. and Zarei, Z
Biological characteristics and life table parameters of the olive leaf moth, Palpita unionalis (Hübner) (Lep.: Pyralidae) feeding on three olive varieties in Iran.
The olive leaf moth, Palpita unionalis (Hübner) is an important pest of nurseries, young olive orchards and also on the suckers of old trees and feeds on some other host plants like Ash, Jasmine and Privet. Any pest management program requires the knowledge about the biology and life table parameters of the pest species. In this work, life history traits and life table parameters as well as the population projection of P. unionalis were studied at 25± 1oC, 65±5 % R.H. and 16:8 (L: D) photoperiod on three olive cultivars: Zard, Rowghani and Kronaiki. The age- stage, two-sex life table is used to incorporate both sexes and the variation in developmental rate among individuals and to obtain accurate population parameters. The developmental time of immature stages (egg to adult emergence) on Kronaiki, Rowghani and Zard were 35.05, 33.78 and 36.08 days, respectively. The longevity of female and male adults in the three varieties were (9.33 and 7.00), (10.64 and 10.60) and (10.21 and 8.10) days, respectively. There was no significant difference among the life table parameters of the three tested varieties. The intrinsic rates of population increase on Kronaiki, Rowghani and Zard were 0.044, 0.049 and 0.047 d-1, respectively. The highest net reproductive was found to be 8.61 offspring per individual on Rowghani. Mean generation times (T) on these varieties were 43.56, 42.12 and 42.04, respectively. Overall, Kronaiki is evaluated as the most unsuitable one for this pest. Therefore, considering other advantages of the variety and also considering the other pest species this variety could be recommended for the pest problem reduction.