Distribution and Dynamics of Larval Instars of Leopard Moth Zeuzera pyrina(L) (Lepidoptera: Cossidae) on Apple Orchards in Lattakia Governorate in Syria

Abdulnabi Mohamed Basher, Louai Hafez Aslan, Jounar Aziz Ibrahim

Abstract


The study was conducted in two apple orchards in Lattakia governorate (Aramo and Rabiia). The main objective of this study was to detect the larval instars of leopard moth Zeuzera pyrina (L) by using the Brooks-Dyar rule, period of the larval stage, distribution and dynamics of its larval instars and duration of its generation. The results of this study showed that there were eight larval instars, a constant size ratio and a geometric increase for the range of larval length and its capsule-width from instar to instar. The coefficient of increase was 1.6 and 1.3 for the length and capsule-width, respectively. The larval stage lasted 13 and 12 months in Aramo and Rabiia, respectively, and the insect has one generation a year in the study regions overwintering in the larval ages 4,5 and 6.

Keywords


Leopard moth, Brooks- Dyar rule, Head capsule, Length, Larval instars, Aramo, Rabiia, Syria

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