دراسة بيولوجية فراشة اللوز الحرشفية Aporia crataegi (L.)‎ في وسط سورية

الملخص EN

The Black-veined white butterfly (Aporia crataegi L.) is an important pest on apples and almonds.

It causes defoliation, weakness and low productivity.

The aim of the present investigation was to study the biology of A.

crataegi on almond trees during the period 2008-2009.

The central region (Homs) was chosen for being the main region of almond cultivation in Syria.

The duration of each stage was determined under the field, incubator and laboratory conditions starting from egg to adult.

The duration of the egg stage was 20.2, 15.2 and 15.5 days, the first larval stage 10.8, 11.7 and 15.4 days, the second larval stage 8.3, 9.7 and 11.9 days, the third larval stage 10.6, 4.9 and 7.1 days, the fourth larval stage 18.6, 9.8 and 8.2 days, the fifth larval stage 17.6, 13.9, and 16.2 days, the pupal stage 16.5, 10.0 and 11.8 days, and the adult stage 11.7, 6.6 and 9.0 days, under field, incubator and laboratory conditions, respectively.